WO2020071160A1 - State determination device, state determination method, and state determination program - Google Patents

Abstract

Provided is a state determination device capable of suitably providing alerts and cancelling alerts without such alerts being canceled despite being in a state where caution is necessary, or conversely, without such alerts being sustained for a prolonged period despite not being in a state where caution is necessary. A state determination device according to a mode of the present invention comprises an acquisition unit which acquires a measurement value of a subject to be measured and an output unit which outputs alert information if the acquired measurement value is out of range of a first upper threshold and lower threshold, and the output unit, while outputting the alert information, references the measurement value over a prescribed period of time against a first cancellation threshold value, which is set to a value different from the first upper threshold and lower threshold, and halts the output of the alert information.

Description

State determination device, state determination method, and state determination program

The present invention relates to a state determination device, a state determination method, and a state determination program.
Priority is claimed on Japanese Patent Application No. 2018-188965 filed on October 4, 2018, the content of which is incorporated herein by reference.

In recent years, for the purpose of detecting failures of machinery and equipment, preventing accidents, and predicting natural disasters, the target is monitored with inspection equipment, measuring equipment, monitoring cameras, etc., and abnormalities etc. are automatically detected based on the monitoring information and The technology for issuing warnings is under development. As an example of the monitoring device as described above, Patent Literature 1 discloses that in a gas flow rate measuring device 38, after a gas flow rate matches an abnormality determination condition and outputs an abnormal signal, the gas flow rate is determined to be abnormal. Describes a technology for automatically resetting an abnormal state by outputting an abnormal state canceling signal when a different abnormal state canceling condition is met, and automatically restoring the state. Japanese Patent Application Laid-Open No. H11-163873 discloses that in the electronic article monitoring device 100 using the resonance tag 40, when a signal exceeding the detection level L1 'is detected, the detection level is set to a level L2' higher than the detection level L1 '. Thus, a technique for suppressing the generation of unnecessary alarms due to false reports is described.

JP 2012-107969 A JP 2009-259029 A

However, the state determination method described in Patent Literature 1 releases an abnormality when the value becomes equal to or more than an abnormality release establishment value. Therefore, when the fluctuation of the measured value is large, the abnormal state and the normal state can be repeated in a short time. There is. Further, according to Patent Literature 1, even if the abnormality clear condition is not met after a predetermined time elapses, the automatic recovery is performed. Therefore, there is a possibility that the abnormality is released in a state where the abnormality cannot be released. Further, in Patent Literature 2, when the detection level exceeds the detection level L1 ', the detection level is set to a high level L2', so that an abnormal state that should be detected at the original detection level L1 'may not be detected as abnormal. is there.

One embodiment of the present invention is to cancel the alert even though the state requires attention, or conversely, to continue the alert for a long time even though the state does not require attention. It is an object of the present invention to provide a state determination device that can perform alerting and canceling the alert more appropriately without causing any trouble.

In order to solve the above problem, a state determination device according to an aspect of the present invention includes an acquisition unit that acquires a measurement value of a measurement target, and an acquired measurement value that is outside a range of a first upper threshold and a lower threshold. And an output unit that outputs the attention information when the value becomes the value.The output unit, during the output of the attention information, for a predetermined time during the measurement value, the first upper threshold and the lower threshold are The output of the caution information is stopped with reference to the value of the first release threshold set to a different value.

According to one embodiment of the present invention, the alert is released in a state that requires attention, or conversely, the alert continues for a long time even in a state that does not require attention. It is possible to provide a state determination device that can more appropriately issue a warning and release the warning without doing so.

It is a block diagram showing composition of a state judging device by a 1st embodiment. It is a conceptual diagram showing a judgment value table and a judgment result table. 5 is a graph illustrating a change over time of a measured value according to the first embodiment. It is a flowchart which shows the processing procedure of a monitoring process. 5 is a flowchart illustrating a procedure of a determination process according to the first embodiment. 9 is a flowchart illustrating a procedure of another determination process according to the first embodiment. 9 is a flowchart illustrating a processing procedure of still another determination processing according to the first embodiment. It is a graph which shows the measured value by a 2nd embodiment. 9 is a flowchart illustrating a procedure of a determination process according to the second embodiment. It is a flowchart which shows the processing procedure of a maximum value calculation process. 13 is a graph showing measured values according to the third embodiment. 13 is a flowchart illustrating a procedure of a determination process according to a third embodiment. It is a block diagram showing the composition of the state judging device by a 4th embodiment. It is a conceptual diagram showing a judgment value table, a judgment result table, a judgment state table, and an output table according to the fourth embodiment. It is a graph which shows the measured value by a 4th embodiment. It is a flow chart which shows a processing procedure of judgment processing by a 4th embodiment. It is a conceptual diagram showing an output result by a 4th embodiment. It is a graph which shows the measured value by a 5th embodiment. It is a flow chart which shows a processing procedure of judgment processing by a 5th embodiment. It is a graph which shows another measurement value by a 5th embodiment. It is a flow chart which shows a processing procedure of another judging processing by a 5th embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a block diagram illustrating a configuration of a state determination device 1 according to the present embodiment. As illustrated in FIG. 1, the state determination device 1 receives information on the mechanical device 3 from the monitoring device 2. The state determining device 1 determines the state of the mechanical device 3 based on the information acquired from the mechanical device 3 and transmits information based on the determined determination result to the determination result output device 4 via a communication line or the like.

The state determination device 1 is composed of a computer such as an open server or a mainframe computer. The state determination device 1 and the monitoring device 2 are connected via a communication line. Similarly, the state determination device 1 and the determination result output device 4 are connected via a communication line. The communication line may be wired or wireless, a public network may be used, a dedicated communication line may be used, or a technology such as VPN (Virtual Private Network) may be used.

The state determination device 1 includes a CPU 5, a volatile memory 6, a nonvolatile memory 7, and a communication unit 8, which are connected to each other via a bus or the like, and mutually transmit and receive data such as calculation results. The non-volatile memory 7 transmits data used by the CPU 5 to the volatile memory 6, and the CPU 5 transmits an operation result calculated using the data of the volatile memory 6 to the communication unit 8. The CPU 5 communicates with a communication line via the communication unit 8.

The volatile memory 6 is a random access memory (RAM) or the like, and the nonvolatile memory 7 is a hard disk drive (HDD) or a solid state drive (SSD). The volatile memory 6 and the non-volatile memory 7 store various data and programs such as tables necessary for processing by the CPU 5, which is a CPU (Central Processing Unit). The volatile memory 6 includes a dictation acquisition unit 10, a determination unit 11, and an output unit 12, and the non-volatile memory 7 includes a determination value database unit 13 and a determination result database unit 14, which will be described later.

The monitoring device 2 is a device that monitors, inspects, and measures the status of the mechanical device 3 to be monitored, and transmits information obtained by communicating with the communication unit 8 of the status determination device 1.

The monitoring device 2 includes a monitoring unit 15 for monitoring, inspecting, and measuring the state of the monitoring target. The information acquired by the monitoring unit 15 from the monitoring target includes temperature, humidity, color, length, area, volume, position, flow rate, water level, concentration, speed, acceleration, density, mass, voltage, current, Magnetic force, radiation dose, illuminance and so on.

The monitoring unit 15 is configured by a device that measures the above information (for example, a thermometer, an illuminometer, a camera, and the like). In the present embodiment, for example, the temperature of the monitoring target is measured by a thermometer.

The determination result output device 4 that receives information based on the determination result of the state determination device 1 determining the state of the mechanical device 3 by communicating with the communication unit 8 of the state determination device 1 outputs a determination result output that outputs a determination result. A section 16 is provided. The determination result output unit 16 is, for example, a display device such as a liquid crystal display, a lighting device such as an LED, or an acoustic device such as a speaker.

If the judgment result output unit 16 is a display device, the judgment result is output by displaying the state of the monitoring target on the display in color or characters. For example, when the status of the monitoring target is displayed in color, yellow is displayed on a part or the whole of the display when the determination result is caution, and blue is displayed on a part or the front of the display when the determination result is normal. When the status of the monitoring target is displayed in characters, characters such as caution and normal are displayed on the display.

If the determination result output unit 16 is a lighting device, the determination result is output by blinking the lighting color or the lighting of the monitoring target state. For example, when the state of the monitoring target is displayed in the lighting color of the illumination, the lighting color of the illumination is set to yellow if the determination result is caution, and the lighting color of the illumination is set to blue if the determination result is normal. Further, when the state of the monitoring target is displayed by lighting or blinking of the lighting, the lighting is blinked when the judgment result is cautionary, and the lighting is turned on when the judgment result is normal.

When the determination result output unit 16 is an audio device, the determination result is output by outputting a warning sound such as a beep sound to the state of the monitoring target. For example, if the determination result is caution, a beep sound is output from the audio device, and if the determination result is normal, no output from the audio device is made.

Although FIG. 1 shows a configuration in which the monitoring device 2 including the monitoring unit 15 and the determination result output device including the determination result output unit 16 are connected to the status determination device 1, the status determination device 1 includes the monitoring unit 15. And a determination result output unit 16.

In the case where the monitoring unit 15 and the determination result output unit 16 are provided inside the state determination device 1, a series of processes from monitoring to output of the determination result are performed in the state determination device.

Although the state determination device 1 is configured to include the CPU 5, the volatile memory 6, and the non-volatile memory 7 in FIG. 1, the present embodiment is not limited thereto, and the acquisition unit 10, the determination unit 11, and the output unit 12 It may be a dedicated electronic circuit.

FIG. 2 is a conceptual diagram of the judgment value table TB1 held by the judgment value database unit 13 and the judgment result table TB2 held by the judgment result database unit 14. The determination value table TB1 includes an alert lower threshold (hereinafter, this may be referred to as a lower threshold) TH1 and an alert upper threshold (hereinafter, this may be referred to as an upper threshold) TH2 used by the determiner 11 when making a determination. And a warning release threshold value (hereinafter, this may be referred to as a release threshold value) TH3 of 10, 40, 20 is held.

The values of the alert lower limit threshold TH1, the alert upper limit threshold TH2, and the alert release threshold TH3 are set when the state determination device 1 is initialized. Note that the value of the alert lower limit threshold TH1, the alert upper limit threshold TH2, and the alert release threshold TH3 may be changed by using a setting tool or the like while the state determination device 1 is operating.

The determination result table TB2 holds a value designating the output method. In the present embodiment, as shown in the determination result table TB2, the determination result indicates a state in which attention is not required for the measurement target. Normal (NORMAL) and a state in which attention is required for the measurement target. (CAUTION).

グ ラ フ FIG. 3 shows graphs 21 to 24 showing the change over time of the measured value TH measured by the monitoring unit 15 for the mechanical device 3. The temperature of the mechanical device 3 changes with the influence of the temperature of the surrounding environment and the use of the mechanical device 3. Since the mechanical device 3 cannot operate normally depending on the temperature, a temperature range in which normal operation is possible is set, and the temperature is constantly measured during use, and the temperature is within the temperature range in which normal operation is possible. Need to be confirmed.

In FIG. 3, the vertical axis represents temperature and the horizontal axis represents time. The alert lower limit threshold value TH1 is a threshold value indicating the lower limit value of the temperature under the normal operation condition for the machine device 3 to operate normally. Further, the alert upper limit threshold value TH2 is a threshold value indicating the upper limit value of the temperature under the normal operation condition. The alert release threshold TH3 is a threshold for canceling the alert, and is used when the state of the measurement target is determined to be normal after the state of the measurement target is determined to be caution by the state determination device 1. If the measured value TH is equal to or greater than the alert lower threshold TH1 and equal to or less than the alert upper threshold TH2, the state determination device 1 determines that the state of the mechanical device 3 is normal.

As shown in the graph 21, the measured value TH is larger than the alert upper limit threshold value TH2 at the time T1, and is out of the range of the temperature under the normal operation condition. At the time T2, the measured value TH is again lower than the alert upper limit threshold value TH2. The temperature has returned to the normal operating range.

Since the measured value TH has become larger than the alert upper limit threshold value TH2 at time T1, the state determination device 1 determines that the state of the mechanical device 3 is caution. The determination result output device 4 outputs the attention information based on the attention information that is the determination result received from the state determination device 1.

The processing of the state determination device 1 when the output of the caution information is stopped or the normal information is output instead of the output of the caution information will be described with reference to graphs 22 to 24 showing the measured values TH due to aging.

As shown in the graph 22, the measured value TH becomes larger than the alert upper limit threshold value TH2 at time T1, becomes TH2 or less at time T2, and becomes larger than the alert upper limit threshold value TH2 again at time T3. Like the measured value TH shown in the graph 22, even when the measured value TH becomes larger than the alert upper limit threshold TH2 and then falls below the alert upper limit threshold TH2, the measured value TH is again set to the alert upper limit in a short period of time. It may be larger than the threshold value TH2.

For this reason, immediately after the measured value TH falls below the alert upper limit threshold value TH2, the possibility that the state needs to be watched again is not low. Therefore, when the alert value falls below the alert upper limit threshold value TH2, the state determination device 1 It is preferable that the state of the mechanical device 3 is determined to be caution for a predetermined time without being determined to be normal.

If the state determination device 1 determines that the state of the mechanical device 3 is normal when the measured value TH falls below the alert upper threshold TH2, the determination result output device 4 outputs the warning information and the normal information in a short time. The output may be repeated. From such a viewpoint, it is preferable that the state determination device 1 determines that the state of the mechanical device 3 is cautionary without determining that the state is normal for a predetermined time.

Further, as shown in the graph 23, the measured value TH becomes larger than the alert upper limit threshold TH2 at the time T1, becomes less than the alert upper limit threshold TH2 at the time T2, and changes from the alert upper limit threshold TH2 or less after the time T2. I have. Unlike the graph 22, the measured value TH in the graph 23 once falls below the alert upper limit threshold TH2, and does not become larger than the alert upper limit threshold TH2 again for a certain period of time, for example, from time T2 to time T4.

However, in the graph 23, the measurement value TH measures a value near the alert upper limit threshold TH2 even after the time T2, and there is a possibility that the measured value TH becomes larger than the alert upper limit threshold TH2 again due to a minute change of the measured value TH over time. Not low. For this reason, even if the state in which the measured value TH has fallen below the alert upper limit threshold value TH2 in the graph 23 has continued for a predetermined period of time, the state determination device 1 determines that the state of the mechanical device 3 is cautionary without determining that the state is normal. Is preferred.

に お い て In the graph 23, the measured value TH may continue to be a value near the alert upper limit threshold TH2 even when the measured value TH falls below the alert upper limit threshold TH2. Therefore, it is preferable that a criterion other than the alert upper limit threshold value TH2 is provided in order for the state determination device 1 to determine that the state of the mechanical device 3 is normal. Therefore, in one embodiment of the present invention, it is preferable to set the alert release threshold TH3 that is smaller than the alert upper threshold TH2, separately from the alert upper threshold TH2.

As shown in the graph 24, the measured value TH becomes larger than the alert upper limit threshold value TH2 at the time T1, and becomes equal to or less than the alert upper limit threshold value TH2 at the time T2. The measured value TH of the graph 24 becomes equal to or less than the alert release threshold TH3 at time T5, becomes larger than the alert release threshold TH3 again at time T6, and is greater than the alert release threshold TH3 and the alert upper limit threshold after time T6. It has remained below TH2.

In the graph 24, the measured value TH once drops below the alert upper limit threshold TH2 and then drops below the alert release threshold TH3, which is a value sufficiently smaller than the alert upper threshold TH2. Different from the measured value TH.

At time T5, the measured value TH of the graph 24 falls below the alert release threshold value TH3 and immediately after the state determination device 1 determines that the state of the mechanical device 3 is normal, the measured value TH becomes larger than the alert upper limit threshold value TH2 again, and the state is determined. It is unlikely that the device 1 will determine the state of the mechanical device 3 as being alert.

However, in the graph 24, the measured value TH falls below the alert release threshold TH3 at time T5, and then becomes larger than the alert release threshold TH3 again at time T6 within a short time, and becomes equal to or less than the alert release threshold TH3. The period is short.

場合 If the period during which the measured value TH is equal to or less than the alert release threshold TH3 is short, the measured value TH equal to or less than the alert release threshold TH3 may have been a low measured value TH due to a measurement error or the like. For this reason, it is preferable that the state determination device 1 determines that the state of the mechanical device 3 is cautionary without determining that the state of the mechanical device 3 is normal for a predetermined time after the alert release threshold value TH3 or less.

に お い て In the graph 21, the measured value TH becomes larger than the alert upper limit threshold value TH2 at the time T1, and becomes equal to or less than the alert upper limit threshold value TH2 at the time T2. Further, in the graph 21, the measured value TH becomes equal to or less than the alert release threshold TH3 at the time T5, and changes from the alert release threshold TH3 or less after the time T5.

The measured value TH in the graph 21 is different from the measured value TH in the above-described graph 24, and after falling below the alert release threshold TH3 at time T5, a predetermined time (the period P is equal to or more than a predetermined value), for example, from time T5. It does not become larger than the alert release threshold TH3 again until time T6. Therefore, after a lapse of a predetermined time from time T5, the state determination device 1 determines that the state of the mechanical device 3 is normal.

FIG. 4 is a flowchart showing a processing procedure of a monitoring process periodically performed by the state determination device 1. As illustrated in FIG. 4, the acquisition unit 10 performs an acquisition process S1 of acquiring the measurement value TH from the monitoring device, and transmits the acquired measurement value TH to the determination unit 11. The determination unit 11 performs a determination process S2 of determining the state of the mechanical device 3 based on the measurement value TH received from the acquisition unit 10, and transmits the determined information to the output unit 12. The output unit 12 performs an output process S3 of outputting the information determined by the determination unit 11 to the determination result output device 4.

FIG. 5 is a flowchart showing the procedure of the determination process S2. First, the determining unit 11 determines whether the measured value TH is larger than the alert upper threshold TH2 or whether the measured value TH is smaller than the alert lower threshold TH1 in order to determine whether or not the alert is within the alert threshold range. (S10).

If the measured value TH is within the range of the alert threshold (S10: YES), the determination unit 11 determines whether the determination result is normal (S11). If the determination result is normal (S11: YES), the determination unit 11 sets the determination result to caution (S12), and ends the determination process S2. If the determination result is not normal (S11: NO), the determination unit 11 ends the determination process S2 as it is.

If the measured value TH is out of the range of the alert threshold (S10: NO), the determination unit 11 determines whether the determination result is caution (S13). Note that the determination result is set to normal as an initial value when the state determination device 1 is initialized, and is set to caution or normal again in step S12 or step S17 described below. If the determination result is caution (S13: YES), the determination unit 11 determines whether the period P has not been measured (S14).

If the period P has not been measured (S14: YES), the determination unit 11 starts measuring the period P (S15), and if the period P has been measured (S14: NO), the determination unit 11 leaves the period as it is. It is determined whether P is equal to or greater than a predetermined value (S16).

If the period P is equal to or longer than the predetermined value (S16: YES), the determination unit 11 sets the determination result to normal (S17), ends the measurement of the period P (S18), and ends the determination process S2. When the period P is less than the predetermined value (S16: NO), the determination unit 11 ends the determination processing S2.

If the judgment result is not cautionary (S13: NO), the judgment unit 11 ends the measurement of the period P (S18), and ends the judgment processing S2.

In the present embodiment, the determination unit 11 may perform the determination process S2 without using the alert release threshold TH3 as shown in FIG. 5, but as shown in FIG. 6, the alert release is performed in step S20. It is preferable to perform the determination processing S2 using the threshold value TH3.

As shown in the flowchart of FIG. 6 showing the procedure of another determination process S2 according to the present embodiment, the process of FIG. 6 is the same as the process of FIG. 5 except that step S20 is added. If the measured value TH is outside the range of the alert threshold (S10: NO), the determination unit 11 determines whether the measured value TH is equal to or less than the alert release threshold TH3 (S20), and the measured value TH alerts. If it is equal to or smaller than the release threshold TH3 (S20: YES), the determination unit 11 proceeds to step S13. If the measured value TH is larger than the alert release threshold TH3 (S20: NO), the determination unit 11 proceeds to step S18.

As described above, in the state determination device 1 of the present embodiment, the alert is released in addition to the alert upper limit threshold TH2 which is a determination criterion for notifying the user that the measurement target needs attention. The alert release threshold TH3, which is a criterion for performing the alert, is provided.

In the state determination device 1 of the present embodiment, the state of the mechanical device 3 is determined to be normal when the measured value TH becomes equal to or less than the alert release threshold TH3 which is smaller than the alert upper threshold TH2 for a predetermined time. I do. For this reason, the state determination device 1 determines that the state of the mechanical device 3 is normal even though the state needs attention, or conversely, the state determination device 1 The state of the device 3 is not determined to be caution. As described above, the state determination device 1 according to the present embodiment can appropriately alert and release the alert.

In the present embodiment, the case where the alert release threshold TH3 is set to a value smaller than the alert upper threshold TH2 has been described. However, the alert release threshold TH3 is set to the alert lower threshold TH1 for the alert lower threshold TH1. What is necessary is just to set to a value larger than TH1.

As described above, in the present embodiment, the state determination device 1 determines that the state of the mechanical device 3 is normal by referring to the attention release threshold TH3 after determining that the state of the mechanical device 3 is attention. Note that the alert release threshold TH3 may be provided separately for the alert upper threshold TH2 and the alert lower threshold TH1, or one common value may be provided.

The time required for the measurement value TH to continue to be equal to or less than the alert release threshold TH3, which is necessary for making the determination to cancel the alert, can be appropriately set according to the measurement target. For example, it may be set according to the frequency of maintenance work on the measurement target. If the maintenance of the measurement target is performed once a day, if the state determination device 1 determines that the state of the measurement target is caution for at least one day, it is possible to confirm that the state of the measurement target is cautionary at the time of maintenance. .

Further, for example, if the measurement target is a repetition of the operation state and the operation stop state, the timing at which the transition to the operation state or the operation stop state may be canceled may be performed, or may be canceled at the timing when the two transitions are confirmed. Is also good. Note that it is desirable to use the alert release threshold TH3 also when the determination unit 11 determines the state of the measurement target using the driving state and the driving stop state.

FIG. 7 is a flowchart showing a processing procedure of still another determination processing S2 according to the present embodiment, focusing on transition to the operation state or the operation stop state. First, the determining unit 11 determines whether the measured value TH is larger than the alert upper threshold TH2 or whether the measured value TH is smaller than the alert lower threshold TH1 in order to determine whether or not the alert is within the alert threshold range. (S10).

If the measured value TH is within the range of the alert threshold (S10: YES), the determination unit 11 determines whether the determination result is normal (S11). When the determination result is normal (S11: YES), the determination unit 11 sets the determination result to caution and ends the determination process S2. When the determination result is not normal (S11: NO), the determination unit 11 ends the determination process S2 as it is.

If the measured value TH is out of the range of the alert threshold (S10: NO), the determination unit 11 determines whether the determination result is caution (S13). If the determination result is caution (S13: YES), it is determined whether the operating state has transitioned (S25).

When the operating state has transitioned (S25: YES), the determination unit 11 sets the determination result to normal (S17), ends the determination processing S2, and when the operating state does not transition (S25: NO), the determination unit 11 remains as it is. The determination processing S2 ends. If the determination result is not cautionary (S13: NO), the determination unit 11 ends the determination processing S2.

When confirming the two transitions, the confirmation of the two transitions confirms that the alert release threshold value TH3 or less is maintained in both the operation state and the operation stop state. Therefore, it is possible to release the alert after confirming that the alert can be released in any of the driving states.

For example, if there are a plurality of operating states to be measured, the timing at which the operating state has transitioned may be set as the timing to cancel, or the timing may be canceled at the timing when it is confirmed that all the operating states have changed.

By confirming the transition to all driving states, it is confirmed that the value of the alert release threshold value TH3 or less continues in all operating states, and therefore, the release of the alert in any driving state It is preferable to be able to release the alert after confirming that it is possible.

[Second embodiment]
In the state determination device 1 according to the first embodiment, the determination result is set normally when the measured value TH is equal to or less than the alert release threshold TH3 during the period P. On the other hand, the state determination device 1 according to the present embodiment determines that the state of the mechanical device 3 is normal based on a local change that is a change within a predetermined period due to the lapse of time of the measured value TH. The configuration of the state determination device 1 according to the present embodiment is the same as that of the first embodiment, and a description thereof will be omitted.

FIG. 8 shows graphs 31 and 32 showing the change over time of the measured value TH measured by the monitoring unit 15 for the mechanical device 3. The temperature of the mechanical device 3 changes with the influence of the temperature of the surrounding environment and the use of the mechanical device 3. Since the mechanical device 3 cannot operate normally depending on the temperature, a temperature range in which normal operation is possible is set, and the temperature is constantly measured during use, and the temperature is within the temperature range in which normal operation is possible. Need to be confirmed.

In FIG. 8, the vertical axis represents temperature and the horizontal axis represents time. The alert lower limit threshold value TH11 is a threshold value indicating a lower limit value of the temperature under normal operating conditions for the machine device 3 to operate normally. The alert upper limit threshold TH12 is a threshold indicating the upper limit of the temperature under the normal operation condition. If the measured value TH is equal to or greater than the alert lower threshold TH11 and equal to or less than the alert upper threshold TH12, the state determination device 1 determines that the state of the mechanical device 3 is normal.

The alert release threshold TH13 is a threshold for canceling the alert, and is used when the state of the measurement target is determined to be caution by the state determination device 1 and then determined to be normal. Note that the alert release threshold TH13, which is a criterion for canceling the alert, is set to a value smaller than the alert upper threshold TH12.

As shown in the graph 31, the measured value TH exceeds the alert upper limit threshold value TH12 at the time T11 and is out of the range of the temperature under the normal operating condition. At the time T12, the measured value TH becomes equal to or less than the alert release threshold value TH13. At time T13, the measured value TH becomes larger than the alert release threshold TH13 again, and after time T13, the measured value TH changes before and after the alert release threshold TH13.

In the graph 31, after the measured value TH falls below the alert release threshold TH13 at time T12, for example, for a certain period of time until time T16, the alert release threshold TH13 is exceeded but the alert upper limit threshold TH12 is maintained. ing. However, since the measured value TH in the graph 31 vibrates up and down over time, it is not unlikely that the measured value TH will become larger than the alert upper limit threshold value TH12 again.

The state determination device 1 according to the present embodiment is a change within a predetermined period of time of the measured value TH after the measured value TH becomes lower than the alert release threshold TH13 after the measured value TH becomes larger than the alert upper limit threshold TH12. The state of the mechanical device 3 is determined based on the local change.

Specifically, for example, in FIG. 8, if the later-described maximum value TH_LMAX after time T12 at which the measured value TH falls below the alert release threshold TH13 is equal to or less than the alert release threshold TH13, the state determination device 1 determines that the state of the mechanical device 3 is Judge as normal.

Conversely, if the maximum value TH_LMAX is larger than the alert release threshold TH13, the state determination device 1 keeps determining that the state of the mechanical device 3 is caution. In the graph 31, the measured value TH is the local maximum value TH_LMAX at the time T14 and is larger than the alert release threshold TH13. Therefore, at the time T14, the state determination device 1 keeps the state of the mechanical device 3 determined to be caution.

On the other hand, the measured value TH in the graph 32 becomes larger than the alert upper limit threshold TH12 at the time T11, becomes less than the alert release threshold TH13 at the time T12, and changes from the alert release threshold TH13 or less after the time T12. doing. In the graph 32, the measured value TH has the maximum value TH_LMAX at the time T15 after the time T12, and the maximum value TH_LMAX at the time T15 is equal to or less than the alert release threshold TH13.

Therefore, at time T15, the state determination device 1 determines that the state of the mechanical device 3 is normal. When the state determination device 1 determines that the state of the mechanical device 3 is normal after the local maximum value TH_LMAX becomes equal to or less than the alert release threshold TH13, it is unlikely that the measured value TH becomes larger than the alert release threshold TH13 again. This is desirable in the present embodiment.

The state determination device 1 may determine the release of the alert based on the first and second two maximum values TH_LMAX. As shown in the graph 32, the measurement value TH records the first maximum value TH_LMAX at time T15, and then records the second maximum value TH_LMAX at time T16. It is as follows.

Assuming that the alert release condition is that two consecutive maximum values TH_LMAX are equal to or less than the alert release threshold TH13, at time T16, the state determination device 1 determines that the state of the mechanical device 3 is normal, and the alert is released. Is done.

Since the state determination device 1 makes a determination based on the two local maximum values TH_LMAX, the possibility that the measured value TH becomes larger than TH13 again after the determination is further higher than in the case where the determination is performed based on the first local maximum value TH_LMAX. Since the alert can be released in a low state, this embodiment is preferable.

Note that if the measured value TH vibrates finely vertically over time due to the influence of an error, noise, or the like, the local maximum value TH_LMAX may frequently occur in a short time. In this case, by using the maximum value TH_LMAX indicated by the measurement value TH in which the influence of the error or the noise is reduced by averaging the measurement value TH or the like, the measurement value itself in which the influence of the error or the noise is reduced is used. The state determination device 1 can determine the state of the mechanical device 3 based on the indicated fluctuation characteristics.

FIG. 9 is a flowchart showing the procedure of the determination process S30 in the present embodiment. Note that the monitoring processing other than the determination processing S30 is the same as in the first embodiment, and a description thereof will not be repeated.

First, the determination unit 11 determines whether the measured value TH is larger than the alert upper threshold TH12 or whether the measured value TH is smaller than the alert lower threshold TH11 in order to determine whether or not the alert threshold is within the range. (S31).

If the measured value TH is within the range of the alert threshold (S31: YES), the determination unit 11 determines whether the determination result is normal (S32). If the determination result is normal (S32: YES), the determination unit 11 sets the determination result to caution (S33) and ends the determination process S30. When the determination result is not normal (S32: NO), the determination unit 11 ends the determination process S30 as it is.

If the measured value TH is out of the range of the alert threshold (S31: NO), the determination unit 11 determines whether the measured value TH is equal to or less than the alert release threshold TH13 (S34). If the measured value TH is equal to or less than the alert release threshold TH13 (S34: YES), the determination unit 11 determines whether the determination result is caution (S35). If the determination result is caution (S35: YES), the determination unit 11 determines whether the maximum value TH_LMAX has been calculated after the maximum value calculation processing S40 described below (S36).

If the maximum value TH_LMAX has been calculated (S36: YES), the determination unit 11 determines whether the maximum value TH_LMAX is equal to or less than the alert release threshold TH13 (S37). When TH_LMAX is equal to or less than the alert release threshold TH13 (S37: YES), the determination unit 11 sets the determination result to normal, and ends the determination processing S30.

け れ ば If the measured value TH is larger than the alert release threshold value TH13 (S34: NO), the determination unit 11 ends the determination processing S30. When the determination result is not cautionary (S35: NO), the determination unit 11 ends the determination process S30. When the local maximum value has not been calculated (S36: NO), the determination unit 11 ends the determination processing S30. When the maximum value TH_LMAX is larger than the alert release threshold value TH13 (S37: NO), the determination unit 11 ends the determination processing S30.

FIG. 10 is a flowchart showing the procedure of the maximum value calculation processing S40. As shown in FIG. 10, the maximum value TH_LMAX is a maximum value during a predetermined time. First, the determination unit 11 determines whether or not the measured value TH is equal to or greater than the previous measured value TH_OLD which is the measured value TH measured in the previous monitoring process (S41).

When the measured value TH is equal to or greater than the previous measured value TH_OLD which is the measured value TH measured in the previous monitoring process (S41: YES), the determining unit 11 determines whether or not the period P has been measured (S42). .

If the period P has not been measured (S42: YES), the determination unit 11 starts measuring the period P (S43). If the period P has been measured (S42: NO), the determination unit 11 continues to measure the measurement value TH. The value is set to the previous measurement value TH_OLD (S44), and the local maximum value calculation processing S40 ends.

If the measured value TH is smaller than the previous measured value TH_OLD which is the measured value TH measured in the previous monitoring process (S41: NO), the determining unit 11 determines whether or not the period P is equal to or more than a predetermined value (S45). When the period P is smaller than the predetermined value (S45: NO), the determination unit 11 ends the local maximum value calculation processing S40.

When the period P is equal to or longer than the predetermined value (S45: YES), the determination unit 11 sets the value of the previous measurement value TH_OLD to the maximum value TH_LMAX (S46), ends the measurement of the period P (S47), and calculates the maximum value. The process S40 ends.

As described above, in the present embodiment, the alert release determination is performed based on the local maximum value TH_LMAX after the measured value TH has become equal to or less than the alert release threshold TH13.

With the above configuration, the state determination device 1 can release the alert in a state where the possibility of returning to the state requiring attention again is sufficiently low, and the alert is not continued for a long time, It can alert and release it.

In addition, with respect to the alert lower limit threshold TH11, in the state determination device 1, the alert release threshold TH13 is set to a value larger than the alert lower limit threshold TH11. Based on the minimum value recorded after the measured value TH exceeds the alert release threshold TH13, the state determination device 1 performs the alert release cancellation determination. As described above, in the present embodiment, the state determination device 1 may perform the release determination of the alert by using not only the maximum value TH_LMAX but also an extreme value.

[Third Embodiment]
In the state determination device 1 according to the first and second embodiments, one alert release threshold TH3, TH13, which is a threshold for release of alert, is used. However, in the state determination device 1 according to the present embodiment, In addition to the alert release threshold TH23, another alert release threshold TH24 is used. The configuration of the state determination device 1 according to the present embodiment is the same as that of the first and second embodiments, and a description thereof will be omitted.

グ ラ フ FIG. 11 shows graphs 41 and 42 showing a temporal change of a measurement value TH obtained by measuring the mechanical device 3 by the monitoring unit 15. The temperature of the mechanical device 3 changes with the influence of the temperature of the surrounding environment and the use of the mechanical device 3. Since the mechanical device 3 cannot operate normally depending on the temperature, a temperature range in which normal operation is possible is set, and the temperature is constantly measured during use, and the temperature is within the temperature range in which normal operation is possible. Need to be confirmed.

In FIG. 11, the vertical axis represents temperature and the horizontal axis represents time. The alert lower limit threshold value TH21 is a threshold value indicating a lower limit value of the temperature under normal operating conditions for the machine device 3 to operate normally. The alert upper limit threshold value TH22 is a threshold value indicating the upper limit value of the temperature under the normal operation condition. If the measured value TH is equal to or greater than the alert lower threshold TH21 and equal to or less than the alert upper threshold TH22, the state determination device 1 determines that the state of the mechanical device 3 is normal.

The alert release thresholds TH23 and TH24 are thresholds for canceling the alert, and are used when the status of the measurement target is determined to be normal after the status determination device 1 determines that the status of the measurement target is caution. The alert release threshold TH23 is smaller than the alert upper threshold TH22, and the alert release threshold TH24 is greater than the alert lower threshold TH21 and smaller than the alert release threshold TH23.

The alert release threshold TH24 indicates one value when the measurement target is in a normal state, and is, for example, an intermediate value between the alert lower threshold TH21 and the alert upper threshold TH22 (the alert lower threshold TH21 and the alert lower). The value obtained by adding the upper limit threshold value TH22 and halving the sum). Note that the alert release threshold TH24 does not necessarily need to be an intermediate value, and may be any value as long as the state determination device 1 does not need to pay attention to the measurement target and can determine that it is normal.

に お い て In the graph 41, the measured value TH becomes larger than the alert upper limit threshold TH22 at time T21, and becomes equal to or less than the alert release threshold TH23 at time T22. After time T22, the value has changed to a value equal to or less than the alert release threshold TH23 without being equal to or less than the alert release threshold TH24, but has changed to a value close to the alert release threshold TH23 after time T22.

Therefore, if the judgment is made based only on the alert release threshold TH23, the alert can be released. However, the alert is in a state close to the state requiring attention, and it may be better not to release the alert. is there. In order not to release the alert when the measured value changes like the measured value TH in the graph 41, the alert release threshold TH23 may be set to a value sufficiently smaller than the alert upper limit threshold TH22.

However, if the alert release threshold TH23 is set to an excessively small value, the measured value TH does not satisfy the condition for canceling the alert (the state determination device 1 determines that the state of the measurement target is normal after being determined to be caution). There is a possibility that the state determination device 1 may continue to determine the state of the mechanical device 3 as being unnecessarily.

In the present embodiment, the alert release threshold TH24 is set to a value smaller than the alert release threshold TH23 separately from the alert release threshold TH23, and the state in which the measured value TH is equal to or less than the alert release threshold TH23 for a predetermined time continues. When the measured value TH becomes equal to or less than the alert release threshold value TH24 at least once, the state determination device 1 determines that the state of the measurement target is normal.

For example, in the graph 42, the measured value TH becomes larger than the alert upper limit threshold TH22 at the time T21, becomes less than the alert release threshold TH23 at the time T22, and becomes less than the alert release threshold TH24 at the time T23. In the graph 42, the measured value TH has been changed to a value equal to or less than the alert release threshold TH23 after the time T22.

The measured value TH of the graph 42 is different from the measured value TH of the graph 41 in that the measured value TH of the graph 42 is equal to or less than the alert release threshold TH24 after the time T23. It can be said that the value has decreased to a value sufficiently smaller than TH22.

Therefore, the measurement value TH in the graph 42 is, for example, a value equal to or less than the alert release threshold TH23 for a predetermined time from time T22 to time T23 and is equal to or less than the alert release threshold TH24. It is determined that the state of the measurement target is normal.

FIG. 12 is a flowchart showing a processing procedure of determination processing S50 in the present embodiment. Note that the monitoring processing other than the determination processing S50 is the same as that of the first and second embodiments, and thus the description is omitted.

First, the determination unit 11 determines whether the measured value TH is larger than the alert upper threshold TH22 or whether the measured value TH is smaller than the alert lower threshold TH21 in order to determine whether or not the alert threshold is within the range. (S51).

If the measured value TH is within the range of the alert threshold (S51: YES), the determination unit 11 determines whether the determination result is normal (S52). When the determination result is normal (S52: YES), the determination unit 11 sets the determination result to caution (S53), and ends the determination process S50. When the determination result is not normal (S52: NO), the determination unit 11 ends the determination process S50 as it is.

If the measured value TH is outside the range of the alert threshold (S51: NO), the determination unit 11 determines whether the measured value TH is equal to or less than the alert release threshold TH23 (S54). If the measured value TH is equal to or less than the alert release threshold TH23 (S54: YES), the determination unit 11 determines whether the determination result is caution (S55). When the determination result is caution (S55: YES), it is determined whether or not the period P for measuring the predetermined time has been measured (S56).

If the period P has not been measured (S56: YES), the determination unit 11 starts measuring the period P (S57), and if the period P has already been measured (S56: NO), the measurement is continued. It is determined whether the value TH is greater than the alert release threshold TH24 (S58).

If the measured value TH is larger than the alert release threshold TH24 (S58: YES), if the measured value TH is less than the alert release threshold TH24 (S58: NO), the flag F is set (S59), and the period P is set. It is determined whether the value is equal to or more than a predetermined value (S60).

The flag F is information for storing information indicating whether or not the measured value TH has become equal to or less than the alert release threshold TH24. When the flag F is set, 1 is set to the flag F, and when the flag F is reset. Is set to 0 in the flag F. Note that the flag F is set to 0 when the state determination device 1 is initialized.

When the flag F is set to 1, it indicates that the measured value TH has become equal to or less than the alert release threshold TH24 at least once during the measurement of the period P. When the flag F is set to 0, it indicates that the measurement value TH has never become equal to or less than the alert release threshold TH24 during the measurement of the period P.

If the period P is equal to or longer than the predetermined value (S60: YES), the determination unit 11 determines whether the flag F is set (S61). When the flag F is set (S61: YES), the determination unit 11 sets the determination result to normal (S62), ends the measurement of the period P (S63), resets the flag F (S64), and determines The process S50 ends.

If the period P is smaller than the predetermined value (S60: NO), the determination unit 11 ends the determination processing S50. When the flag F is not set (S61: NO), the determination unit 11 ends the determination processing S50. If the measured value TH is larger than the alert release threshold TH23 (S54: NO), the determination unit 11 ends the measurement of the period P (S63), resets the flag F (S64), and ends the determination process S50. If the determination result is not cautionary (S55: NO), the determination unit 11 ends the measurement of the period P (S63), resets the flag F (S64), and ends the determination process S50.

As described above, in the present embodiment, the state determination device 1 sets the alert release threshold TH23, which is a criterion for canceling the alert, to a value smaller than the alert upper threshold TH22. In addition to the alert release threshold TH23, the alert release threshold TH24 is set to a value smaller than the alert release threshold TH23.

Note that, in the present embodiment, the case where the measured value TH exceeds the alert upper limit threshold TH22 has been described. However, even when the measured value TH becomes less than the alert lower limit threshold TH21, the alert release threshold TH23 is also different. The alert release threshold TH24 may be set.

When the measured value TH is less than the alert lower limit threshold TH21, the alert release threshold TH23 is set to a value larger than the alert lower threshold TH21, and the alert release threshold TH24 is set to a value greater than the alert release threshold TH23. .

In the present embodiment, after the measured value TH becomes equal to or less than the alert release threshold TH23, the state determination device 1 performs the alert release determination based on whether or not the alert value is equal to or less than the alert release threshold TH24.

As described above, in the present embodiment, in a state where the possibility that the mechanical device 3 returns to the state requiring attention again is sufficiently low, the state determination device 1 can determine to release the alert. Further, in the present embodiment, since the alert release threshold TH23 does not need to be set too strictly, the state determination device 1 determines the state of the mechanical device 3 as being unnecessarily continued for an unnecessarily long time (alert). ) It is possible to alert and release the alert without continuing.

[Fourth Embodiment]
In the state determination device 1 according to the first to third embodiments, one alert upper threshold TH2, TH12, and TH22 is used. However, in the status determination device 1 according to the present embodiment, in addition to the alert upper threshold TH32, Another alert upper threshold value TH33 is used.

FIG. 13 is a block diagram showing a configuration of the state determination device 1 according to the present embodiment. In the state determination device 1 according to the present embodiment, in addition to the configuration of the first to third embodiments, the nonvolatile memory 7 further includes a determination information database unit 46 and an output database unit 47.

In addition, as shown in the determination value table TB11 according to the present embodiment in FIG. 14, the determination value database unit 45 is different from the alert upper limit threshold TH32 used by the determiner 11 when making a determination, and is a value of another alert upper limit threshold TH33. (For example, 30).

The judgment information database unit 46 holds a judgment information table TB12 shown in FIG. 14 that holds judgment information different from judgment results directly linked to the output output from the judgment result output unit. The determination information is information based on the measurement result before the previous time, and is, for example, four pieces of information: alert stop (STOP), alert start (START), alert ongoing (CONTINING), and alert release (CANCEL). . The determination information is, for example, information on setting or canceling the alert for the measurement target.

(4) The output database unit 47 holds information for output that holds a measured value for each time, a determination result, and determination information, as in an output table TB13 illustrated in FIG. In the example of FIG. 14, at time T31, the measured value is 45, the determination result is caution, and the determination information is a warning start.

Similarly, at time T32, the measured value is 20, the determination result is normal, and the determination information indicates that the alert is being continued. At the time T33, the measured value becomes 35, the judgment result becomes caution, and the judgment information indicates that attention is being continued. At the time T34, the measured value becomes 20, the determination result becomes normal, and the determination information indicates that the alert is released. At time T35, the measured value becomes 35, the determination result becomes normal, and the determination information indicates that the alert is stopped.

FIG. 15 shows a graph 51 showing a temporal change of a measured value TH obtained by measuring the mechanical device 3 by the monitoring unit 15. The temperature of the mechanical device 3 changes with the influence of the temperature of the surrounding environment and the use of the mechanical device 3. Since the mechanical device 3 cannot operate normally depending on the temperature, a temperature range in which normal operation is possible is set, and the temperature is constantly measured during use, and the temperature is within the temperature range in which normal operation is possible. Need to be confirmed.

In FIG. 15, the vertical axis represents temperature and the horizontal axis represents time. The alert lower limit threshold value TH31 is a threshold value indicating the lower limit value of the temperature under the normal operation condition for the machine device 3 to operate normally. The alert upper limit threshold value TH32 is a threshold value indicating the upper limit value of the temperature under the normal operation condition. If the measured value TH is equal to or greater than the alert lower threshold TH31 and equal to or less than the alert upper threshold TH32, the state determination device 1 determines that the state of the mechanical device 3 is normal.

The alert upper limit threshold TH33 is a value smaller than the alert upper limit threshold TH32, and replaces the alert upper limit threshold TH32 when the determination information for the measurement target of the state determination device 1 is alerting start and alerting ongoing. Is a threshold value indicating the upper limit value of the temperature under normal operating conditions.

As described above, when the determination information for the measurement target of the state determination device 1 is that the alert is started and the alert is being continued, the measurement value width in which the state of the measurement target is determined to be alert by the state determination device 1 is not ( (While alerting is stopped and alerting is canceled). Since the measurement value range in which the state of the measurement target is determined to be caution is widened, the measurement result of the measurement target by the state determination device 1 is easily determined to be caution.

As shown in the graph 51, the measured value TH becomes larger than the alert upper limit threshold value TH32 at the time T31, the state determination device 1 determines the state of the mechanical device 3 as being alert, and sets the determination information to be alert initiation.

In the graph 51, at time T32, the measurement information TH has exceeded the alert upper limit threshold value TH32 before the time T32, so that the determination information is set to alert start. Therefore, the state determination device 1 compares the measured value TH with the alert upper limit threshold value TH33, and determines that the state of the mechanical device 3 is normal because the measured value TH is equal to or less than the alert upper limit threshold value TH33. It should be noted that the state determination device 1 sets the alerting continuation because the period P used for the determination of the determination information is not longer than the predetermined time, for example.

In the graph 51, at time T33, the measured value TH remains at the time T33 because the period P is not equal to or greater than the predetermined value. The arousal upper threshold TH33 is used. Since the measured value TH is larger than the alert upper limit threshold value TH33, the state determination device 1 determines the state of the mechanical device 3 to be caution.

In the graph 51, at the time T34, the measured value TH becomes the alert release because the period P has become equal to or more than the predetermined value, and the alert upper limit threshold TH32 is used as the threshold indicating the upper limit of the temperature under the normal operation condition. . At time T34 in the graph 51, the measured value TH is equal to or less than the alert upper limit threshold value TH32, so the state determination device 1 determines that the state of the mechanical device 3 is normal.

に お い て In the graph 51, at the time T35, the measured value TH is the alert release in the determination state, and the alert upper limit threshold TH32 is used as the threshold indicating the upper limit value of the temperature under the normal operation condition. At time T35 in the graph 51, the measured value TH is equal to or lower than the alert upper limit threshold value TH32, so the state determination device 1 determines that the state of the mechanical device 3 is normal. Since the alert release continues as the determination information, the state determination device 1 sets the determination information to the alert stop.

The determination result of the state determination device 1 at the time T33 and the T time 35 of the measured value TH in the graph 51 indicates that, although the measured value TH is the same value (35 in the output table TB13 in FIG. 14), attention is paid to each. It is normal.

Since the determination information of the state determination device 1 is different between time T33 and T time 35 in the graph 51, the alert upper limit threshold TH33 is used at time T33, and the alert upper limit threshold TH32 is used at time T35, and the determination of the determination result is performed. This is because the thresholds used are different.

By changing the alert upper limit thresholds TH32 and TH33, which are the criteria for determining the determination result in accordance with the determination information, even if the measurement values are the same, it is more important that the alert information continues to be alerted. It is easier for the state determination device 1 to determine that the determination result is caution than when the arousal is stopped.

When the measurement target is in the alert state such as the alert start or the alert continuing, even if the measurement value TH is once determined to be normal by the state determination device 1, the determination result is again noted by the state determination device 1. Probability is high.

FIG. 16 is a flowchart showing a processing procedure of determination processing S70 in the present embodiment. Note that the monitoring processing other than the determination processing S70 is the same as in the first to third embodiments, and a description thereof will be omitted.

First, the determination unit 11 determines whether the measured value TH is larger than the alert upper threshold TH32 or whether the measured value TH is smaller than the alert lower threshold TH31 to determine whether or not the alert threshold is within the range. (S71).

If the measured value TH is within the range of the alert threshold (S71: YES), the determination unit 11 determines whether the alert information is stopping alert or canceling alert (S72). Note that the determination information is set such that the alert is stopped as an initial value at the time of initialization of the state determination device 1 or the like, and is set again, for example, at the start of alert or during the ongoing alert at step S73 or step S77 described later. You.

When the determination information is during the suspension of the alert or the release of the alert (S72: YES), the determination unit 11 sets the determination information to the start of the alert (S73), and sets the determination result to the attention (S74). S70 ends. When the determination information is not during the alerting stop or the alerting is not canceled (S72: NO), the determining unit 11 ends the determination process S70 as it is.

If the measured value TH is out of the range of the alert threshold (S71: NO), the determining unit 11 determines whether the alert information is the alert start or alert ongoing (S75). When the determination information is not the start of the alert or the alert is not continued (S75: NO), the determination unit 11 determines whether the determination information is the release of the alert (S86), and when the determination information is the release of the alert (S87: YES), the determination information is set to stop alerting (S87), and the determination processing S80 ends. If the judgment information is not the alert release (S86: NO), the judging unit 11 ends the judgment processing S70 as it is.

When the judgment information is the start of the alert or the continuation of the alert (S75: YES), the determination unit 11 determines whether the alert information is the continuation of the alert (S76), and when the determination information is the continuation of the alert, It is set that the alert is ongoing in the determination information (S77).

Next, the determination unit 11 determines whether the measured value TH is equal to or less than the alert upper limit threshold value TH33 (S78). When the measured value TH is equal to or smaller than the alert upper limit threshold TH33 (S78: YES), the determination unit 11 sets the determination result to normal, and when the measured value TH is larger than the alert upper limit threshold TH33 (S78: NO), the determiner 11 sets the judgment result carefully.

Next, the determination unit 11 determines whether the period P has not been measured (S81). If the period P has not been measured (S81: YES), the measurement unit 11 starts measuring the period P (S82).

Next, the determination unit 11 determines whether or not the period P is equal to or greater than a predetermined value (S83). If the period P is smaller than the predetermined value (S83: NO), the determination processing S70 ends. When the period P is equal to or longer than the predetermined value (S83: YES), the determination unit 11 sets the determination information to the alert release (S84), ends the measurement of the period P (S85), and ends the determination process S70.

FIG. 17 is a conceptual diagram showing an output result 60 output by the determination result output unit 16 according to the present embodiment. As shown in FIG. 17, the output result 60 includes a graph display unit 61, a time-lapse result display unit 62, and a determination result display unit 63.

(4) The graph display section 61 displays a change in the measured value TH with the passage of time as a graph. The aging result display unit 62 displays the contents of the output table TB13 as a table. The determination result display section 63 displays the determination result as characters.

As described above, the state determination device 1 according to the present embodiment can quickly determine that the determination result is attention again by setting the strict determination criteria. In addition, the state determination device 1 according to the present embodiment can output the determination information to grasp the current state of the measurement target and allow the user of the state determination device 1 and its related persons to appropriately understand the determination result. It becomes possible.

The alert upper limit threshold TH33 is different from the alert release thresholds TH13, TH23, TH24 in the first to third embodiments. The determination as in the first to third embodiments may be performed simultaneously with the present embodiment. However, there are cases where the alert upper limit threshold value TH33 matches the alert alert release threshold values TH13, TH23, and TH24.

In the present embodiment, a case has been described in which two upper thresholds are provided, such as the alert upper thresholds TH32 and TH33. However, the lower alert threshold TH31 is also larger than the alert lower threshold TH31. 'Etc. may be provided.

The alert lower limit threshold TH31 'is a threshold indicating the lower limit value of the temperature in the normal operating condition instead of the alert lower threshold TH31 when the determination information for the measurement target of the state determination device 1 is alert start and alert ongoing. It is.

[Fifth Embodiment]
In the first to fourth embodiments, the state determination device 1 determines the state of the measurement target based on the measurement value of one measurement target. On the other hand, the state determination device 1 according to the present embodiment measures by changing the alert upper limit threshold WL3 based on the measurement value WL_U of another measurement target different from the measurement target in addition to the measurement value WL_L of the measurement target. Determine the state of the target.

構成 The configuration of the state determination device 1 in this embodiment is the same as that of the first to fourth embodiments, but the monitoring device 2 measures not the temperature of the mechanical device 3 but, for example, the water levels at a plurality of points in a river.

FIG. 18 shows a graph 71 showing the measured value WL_U of the observation point A upstream of the river and a graph 72 showing the measured value WL_L of the observation point B downstream of the river. In FIG. 18, the vertical axis represents the water level and the horizontal axis represents the time, and the horizontal axes of the graphs 71 and 72 are shown to match.

In FIG. 18, the alert upper limit threshold WL1 is a threshold for determining that the water level at the observation point A is normal by the state determination device 1. The alert release threshold WL2 is a threshold at which the alert is released at the observation point A, and is used when the state determination device 1 determines that the water level state at the observation point A is normal after being determined to be caution. This is a threshold.

The alert upper limit threshold WL3 is a threshold at which the water level at the observation point B is determined to be normal by the state determination device 1. The alert release threshold WL4 is a threshold at which the alert is released at the observation point B, and is used when the state of the observation point B is determined to be normal after the state of the observation point B is determined to be caution by the state determination device 1. is there.

The alert release threshold WL5 is used when the water level at the observation point A is determined to be normal by the state determination device 1 and when the state of the water level at the observation point B is determined to be normal by the state determination device 1 Is the threshold used for Note that the alert release threshold WL5 is larger than the alert release threshold WL4.

に お い て In the graph 71, the measured value WL_U becomes larger than the alert upper limit threshold WL1 at the time T41, becomes less than the alert release threshold WL2 at the time T43, and changes to be less than the alert release threshold WL2 after the time T43.

In the graph 72, the measured value WL_L becomes larger than the alert release threshold WL4 at time T42, becomes lower than the alert release threshold WL4 at time T45, and changes to be lower than the alert release threshold WL4 after time T45.

に お い て At time T43, the measured value WL_L is larger than the alert release threshold WL4, and the state determination device 1 determines that the state of the water level at the observation point B is caution. On the other hand, at time T43, the measured value WL_U is equal to or less than the alert release threshold WL2, and the state determination device 1 determines that the state of the water level at the observation point A is normal. This shows that the water level at the downstream observation point B is rising, but the water level at the upstream observation point A is falling.

Since the water level has dropped at the upstream observation point A, the measured value WL_L of the downstream observation point B decreases and the measured value WL_U decreases after time T43, similarly to the measurement value WL_U of the upstream observation point A. It is highly likely that they will

Therefore, based on the measurement value WL_U of the upstream observation point A, the state determination device 1 changes the alert release threshold WL4 for the measurement value WL_L of the downstream observation point B, and at an appropriate timing, the state determination device 1 After the state of the water level is determined to be caution, it can be determined to be normal.

For example, in the graph 71, the measured value WL_U of the upstream observation point A has decreased to the alert release threshold WL2 or less after the time T43, and the necessity to pay attention to the flooding of the river also decreases at the observation point B downstream. it seems to do. Therefore, the alert release threshold WL4 is changed to the alert release threshold WL5, and the state determination device 1 determines that the state of the water level at the observation point B is normal even if the measured value WL_L is relatively high.

By changing the alert release threshold WL4 to the alert release threshold WL5, the state determination device 1 can determine the state of the water level of the observation point B to be normal earlier than in the case where the alert release threshold WL5 is not changed. The determination device 1 does not continue to determine the state of the water level at the observation point B as being caution.

In contrast to the measured value WL_U in the graph 71, when the measured value WL_U at the upstream observation point A continues to be larger than the alert upper limit threshold WL1, the measured value WL_L at the downstream observation point B may increase with time. Is high. In this case, the alert release threshold WL4 is set to a smaller value so as to be a strict condition, so that the state determination device 1 can easily determine the state of the water level of the observation point B as being caution.

FIG. 19 is a flowchart showing a processing procedure of determination processing S100 in the present embodiment. Note that the monitoring processing other than the determination processing S100 is the same as in the first to fourth embodiments, and a description thereof will be omitted.

First, the determination unit 11 determines whether or not the measured value WL_U is equal to or less than the alert release threshold WL2 (S101), and if the result is affirmative (S101: YES), sets the alert release threshold WL5 as the fluctuation threshold WLV (S102). In the case of a negative result (S101: NO), the alert release threshold WL4 is set as the fluctuation threshold WLV (S103).

Next, the determination unit 11 determines whether or not the measured value WL_L is equal to or less than the fluctuation threshold WLV (S104). If the determination is affirmative (S104: YES), the determination result at the downstream observation point B is set to normal (S105). Then, the determination processing S100 ends. If the determination in step S104 is negative (S104: NO), the determination result at the downstream observation point B is set to caution (S106), and the determination process S100 ends.

Another example of the present embodiment is a case where displacements at a plurality of points due to crustal deformation are measured. In this case, even if the alert release thresholds DCV1, DCV2, DDV1, and DDV2 of the respective measurement targets are set based on the relative measurement value D_R of the measurement value D_C of the measurement target and the measurement value D_D of the other measurement target. Good.

Note that the alert release thresholds DCV1 and DCV2 are used when the state of the displacement of the observation point C is determined to be normal after the state of the displacement of the observation point C is determined by the state determination device 1. Similarly, the alert release thresholds DDV1 and DDV2 are thresholds used when the state of the displacement of the observation point D is determined to be normal after the state of the displacement of the observation point D is determined by the state determination device 1.

FIG. 20 shows a graph 81 showing the measured value D_C of the observation point C, a graph 82 showing the measured value D_D of the observation point D, and a graph 83 showing the relative value D_R of the observation point C and the observation point D. It is assumed that the displacement of the observation point C and the displacement of the observation point D may be interlocked with each other. In FIG. 20, the vertical axis represents displacement and the horizontal axis represents time, and the horizontal axes of the graphs 81, 82, and 83 are shown to match.

In another example of the present embodiment, a case where the amount of displacement (hereinafter, this may be referred to as fluctuation) is small is a normal state at observation points C and D, and fluctuation at observation points C and D is large. It is assumed that the situation requires more attention to an earthquake.

In FIG. 20, the alert lower limit threshold D1 is a threshold indicating a lower limit when the state determination device 1 determines that the state of displacement of the observation point C is normal, and the alert upper limit threshold D2 is an alert upper limit threshold D2. Is a threshold value indicating the upper limit when it is determined that the displacement state is normal.

The alert reference threshold D3 is an intermediate value or a value near the intermediate value between the alert lower threshold D1 and the alert upper threshold D2, which is a reference value. As the measured value D_C is closer to the alert reference threshold D3, It is assumed that the state of displacement of the observation point C is close to the state that should be originally (normal).

The alert release threshold D10 is a threshold for which the measured value D_C becomes a value greater than the alert upper limit threshold D2 and the state of the displacement of the observation point C is determined to be normal after the state determination device 1 determines that the state of displacement is caution. (It is set to the alert release threshold DCV1 as described later).

The alert release threshold D11 is a threshold for determining that the measured value D_C is smaller than the alert lower limit threshold D1 and that the state of the displacement of the observation point C is normal after the state determination device 1 determines that the state of displacement is caution. (It is set to the alert release threshold DCV2 as described later).

In FIG. 20, the alert lower limit threshold D4 is a threshold indicating the lower limit when the state determination device 1 determines that the state of displacement of the observation point D is normal, and the alert upper limit threshold D5 is that the state determination device 1 uses the observation point D. Is a threshold value indicating the upper limit when it is determined that the displacement state is normal.

Also, the alert reference threshold D6 is an intermediate value between the alert lower threshold D4 and the alert upper threshold D5 or a value near the intermediate value, which is a reference value. As the measured value D_D is closer to the alert reference threshold D6, It is assumed that the state of displacement of the observation point D is close to the state that should be originally (normal).

The alert release threshold value D14 is a threshold value at which the measured value D_D becomes greater than the alert upper limit threshold value D5 and the state determination device 1 determines that the displacement state of the observation point D is normal after the state of the displacement is determined to be attention ( The alert release threshold value DDV1 is set as described below.

The alert release threshold D15 is a threshold for determining that the measured value D_D is smaller than the alert lower limit threshold D4 and that the state of the displacement of the observation point D is normal after the state determination device 1 determines that the state of displacement is caution (described later). Is set to the alert release threshold DDV2 as shown in FIG.

When the observation point C and the observation point D are irrelevant, the measured value D_C of the graph 81 in FIG. 20 is a value equal to or more than the alert lower threshold D1 and equal to or less than the alert upper threshold D2 and is within the alert threshold. It can be said that the state of displacement of the observation point C is normal.

Similarly, when the observation point C and the observation point D are irrelevant, the measured value D_D of the graph 82 in FIG. 20 is a value equal to or more than the alert lower limit threshold D4 and equal to or less than the alert upper limit threshold D6 and is within the alert threshold. Therefore, it can be said that the state of displacement of the observation point D is normal.

However, the displacement of the observation point C and the displacement of the observation point D are observation points that may be interlocked, and the relative displacement between the displacement of the observation point C and the displacement of the observation point D must also be noted. In this case, it is necessary to evaluate the relative value of the displacement of the observation point C and the displacement of the observation point D.

相 対 Relative value D_R in graph 83 in FIG. 20 indicates the relative displacement of observation point C as viewed from observation point D. The alert reference threshold D9 is a value obtained by subtracting the alert reference threshold D3 from the alert reference threshold D6, and the alert lower limit threshold D7 is the difference between the displacement of the observation point C and the displacement of the observation point D by the state determination device 1. This is a threshold value indicating the lower limit when the relative value is determined to be normal. The alert upper limit threshold D8 is a threshold indicating the upper limit when the state determination device 1 determines that the relative value between the displacement of the observation point C and the displacement of the observation point D is normal.

As shown in the graphs 81 and 82, the measured value D_C and the measured value D_D change so as to be separated from each other, so that the relative value D_R of the graph 83 increases with the passage of time. It becomes larger than D8.

As described above, the state of displacement of the observation point C and the state of displacement of the observation point D can be said to be normal when attention is paid only to individual displacements, but care must be taken when attention is paid to relative displacements. I can say.

In another example of the present embodiment, when measuring a plurality of measurement objects that are linked or interact with each other or have a significant relative relationship, not only the absolute measurement value of each observation point but also the relative measurement value The alert release thresholds DCV1, DCV2, DDV1, and DDV2 are set based on the logical relationship.

For example, in the graphs 81, 82, and 83 in FIG. 20, the relative value D_R becomes larger than the alert upper limit threshold D8 after the time T51. Therefore, the alert release thresholds DCV1, DCV2, DDV1, and DDV2 for the measured values D_C and D_D may be set strictly as the alert release thresholds D12, D13, D16, and D17 instead of the alert release thresholds D10, D11, D14, and D15. .

Note that the alert release thresholds D10 and D14 are thresholds for canceling the determination result of the alert when the measured values D_C and D_D exceed the alert upper limit thresholds D2 and D5. In order to strictly set the threshold for canceling the attention determination result with respect to the alert release thresholds D10 and D14, the alert release thresholds D12 and D16 need to be smaller than the alert release thresholds D10 and D14. There is.

Similarly, the alert release thresholds D11 and D15 are thresholds for canceling the determination result of the alert when the measured values D_C and D_D exceed the alert lower limit thresholds D1 and D4. In order to strictly set the threshold for canceling the attention determination result with respect to the alert release thresholds D11 and D15, the alert release thresholds D13 and D17 need to be larger than the alert release thresholds D11 and D15. There is.

FIG. 21 is a flowchart showing the procedure of the determination processes S110, S120, and S130 in the present embodiment. Note that the monitoring processes other than the determination processes S110, S120, and S130 are the same as those in the first to fourth embodiments, and a description thereof will be omitted.

The determination unit 11 calculates the determination result of the relative value D_R in the determination process S110, outputs the determination result of the displacement state of the observation point C based on the determination result of the relative value D_R in the determination process S120, and outputs the determination result in the determination process S130. The determination result of the displacement state of the observation point D is output based on the determination result of the relative value D_R.

In the determination process S110, the determination unit 11 determines whether the relative value D_R is greater than the alert upper threshold D8 or whether the relative value D_R is less than the alert lower threshold D7 (S111).

If the result of step S111 is affirmative (S111: YES), the determination unit 11 sets the determination result of the relative value D_R to caution (S112), and ends the determination process S110. If step S112 is negative (S111: NO), the determination unit sets the determination result of the relative value D_R to normal (S113), and ends the determination processing S110.

In the determination process S120, the determination unit 11 determines whether or not the determination result of the relative value D_R is set to attention (S121). If step S121 is a positive result (S121: YES), the determination unit 11 sets the alert release threshold D12 as the alert release threshold DCV1, and sets the alert release threshold D13 as the alert release threshold DCV2 (S122).

場合 If step S121 is a negative result (S121: NO), the determination unit 11 sets an alert release threshold D10 as the alert release threshold DCV1, and sets an alert release threshold D11 as the alert release threshold DCV2 (S123).

Next, the determination unit 11 determines whether the measured value DC is equal to or less than the alert release threshold DCV1 or whether the measured value DC is equal to or greater than the alert release threshold DCV2 (S124). When step S124 is a positive result (S124: YES), the determination unit 11 sets the determination result of the displacement state of the observation point C to normal (S125), and ends the determination process S120. When step S124 is a negative result (S124: NO), the determination unit 11 sets the determination result of the displacement state of the observation point C to caution (S126), and ends the determination processing S120.

In the determination process S130, the determination unit 11 determines whether or not the determination result of the relative value D_R is set to caution (S131). When step S131 is a positive result (S131: YES), the determination unit 11 sets the alert release threshold DV1 to the alert release threshold D16, and sets the alert release threshold DV2 to the alert release threshold D17 (S132).

場合 If step S131 is a negative result (S131: NO), the determination unit 11 sets the alert release threshold D14 as the alert release threshold DDV1, and sets the alert release threshold D15 as the alert release threshold DDV2 (S133).

Next, the determination unit 11 determines whether the measured value D_D is equal to or less than the alert release threshold DDV1, or whether the measured value D_D is equal to or greater than the alert release threshold DDV2 (S134). When step S134 is a positive result (S134: YES), the determination unit 11 sets the determination result of the displacement state of the observation point D to normal (S135), and ends the determination processing S120. When step S134 is a negative result (S134: NO), the determination unit 11 sets the determination result of the displacement state of the observation point D to caution (S136), and ends the determination processing S120.

計 測 In measurement such as crustal movement, the threshold may be changed in consideration of displacement in a direction different from the direction in which measurement is performed. For example, a case where a displacement of a certain observation point on the ground surface is observed will be described as an example.

Since the observation point may be displaced not only in the ground plane but also in the direction perpendicular to the ground plane, even if the displacement in the ground plane is small, it will be displaced in the direction perpendicular to the ground plane. May cause a situation that requires attention.

場合 If a displacement exceeding a predetermined value occurs in a direction perpendicular to the ground plane in this way, the threshold for determination may be changed based on the displacement in the ground plane. As described above, in the present embodiment, the alert upper limit threshold WL3 and the alert release thresholds DCV1, DCV2, DDV1, DDV2 are changed based on the measurement value of another measurement object different from the measurement object. It can alert and release it.

[Other embodiments]
In the first to fifth embodiments, only two judgment results, caution and normal, are made, but the present invention is not limited to this. For example, three states are defined as alerts that require alerting: alerts that require minor alerts, warnings that require severe alerts, and abnormalities that require immediate attention. Attention information, warning information, and abnormality information may be output.

In this case, an alert upper threshold and an alert lower threshold are set for the alert state, an alert upper threshold and an alert lower threshold are set for the alert status, and an alert alert lower threshold is set for the alert status. Alternatively, an abnormality occurrence upper limit threshold and an abnormality occurrence lower limit threshold may be set.

The alert release threshold is used to release the caution state, the warning notification release threshold is used to release the warning state, and the abnormality release threshold is used to release the abnormal state May be performed. By setting the conditions for canceling the three states in this way, processing suitable for the situation is realized.

For example, the elapsed time from the normal state to the release is made longer in the case of the warning state than in the case of the caution state. In the case of an abnormal state, unlike the case of the caution and warning states, the state is not released over time, and is released after confirming that a predetermined response for correcting the abnormal state has been completed. This is preferable because the abnormal state is not erroneously released.

In the fifth embodiment, the alert release thresholds DCV1, DCV2, DDV1, and DDV2 are changed based on the relative value D_R. However, attention is required depending on the duration or the number of recordings in which the measured value is equal to or greater than the alert upper limit threshold. The arousal release threshold may be changed.

(4) When the measured value is larger than the alert threshold, the state determination device 1 determines that the state of the measurement target is alert. However, the measured value soon becomes equal to or lower than the alert upper threshold and may be further equal to or less than the alert release threshold.

In this case, there is a possibility that the measured value temporarily exceeds the alert upper limit threshold value due to a measurement error or measurement noise. Also, during a long period of time, the measured value does not become larger than the alert upper limit threshold, so it is considered that the possibility that the measurement target is in a state to be careful is not high.

On the other hand, if the measured value once becomes larger than the alert upper limit threshold and then becomes larger than the alert upper limit threshold for a long time, the cause is unlikely to be the influence of errors, noise, etc. It is likely that the state should be high. Therefore, by changing the alerting state release threshold according to the duration of the state where the measured value is greater than the alerting threshold, processing suitable for the situation is realized.

For example, the longer the duration of the state where the measured value is larger than the alerting threshold, the lower the alerting state release threshold, so that it is difficult for the state determination device 1 to cancel the attention determination. Thus, the higher the possibility that the state of the measurement target should be noted, the more difficult it is for the state determination device 1 to cancel the determination of the attention.

ほ ど In addition, the lower the possibility that the state of the measurement target is a state that requires attention, the easier the state determination device 1 is to cancel the determination of attention. For this reason, the state determination apparatus 1 does not needlessly continue to determine that there is caution.

In addition, the effect of errors and noise is large, and although the measured value continues to be larger than the alert threshold except for a part, the measured value is less than the alert threshold due to the influence of error and noise. It may be.

In this case, for example, the determination may be made based on the number of times the measured value has become larger than the alert threshold within a predetermined time, or the duration of a state in which the average value of the measured values within the predetermined time is equal to or more than the alert threshold. May be determined based on

Claims (15)

An acquisition unit for acquiring a measurement value of a measurement target,
An output unit that outputs caution information when the acquired measurement value is outside the range of the first upper threshold and the lower threshold.
The output unit refers to a value of a first release threshold set to a value different from the first upper threshold and the lower threshold for a predetermined time while the caution information is output. Stopping the output of the caution information,
State determination device. The output unit is configured to output the caution based on the first release threshold set to a value smaller than the first upper threshold when the measured value is equal to or greater than the value of the first upper threshold and outputting caution information. Stop outputting information,
The output unit, when the measured value is equal to or less than the lower threshold, stops outputting the attention information based on the first release threshold set to a value greater than the lower threshold,
The state determination device according to claim 1. The output unit is configured to stop outputting the attention information based on a local change that is a change within a predetermined period due to the lapse of time of the measurement value.
The state determination device according to claim 1. The output unit outputs the caution information when the local maximum value of the measurement value is equal to or less than the first cancellation threshold value after the measurement value is equal to or less than the value of the first cancellation threshold value. Stop,
Alternatively, the output unit may be configured such that, when the minimum value of the measurement value is equal to or greater than the first cancellation threshold value first after the measurement value equals or exceeds the value of the first cancellation threshold value, Stop output,
The state determination device according to claim 3. The output unit is configured to output the caution information when the local maximum value of the measurement value becomes the second release threshold or less second after the measurement value becomes the value of the first release threshold or less. To stop the
Alternatively, the output unit may be configured such that when the measured value is equal to or more than the first release threshold value and the second minimum value of the measured value is equal to or greater than the first release threshold value, the caution information is displayed. Stop output of
The state determination device according to claim 3. The output unit outputs the caution information when the measured value becomes equal to or less than a value of the first cancellation threshold and then becomes equal to or less than a value of a second cancellation threshold different from the first cancellation threshold. To stop the
Alternatively, the output unit may be configured to set the caution information when the measured value is equal to or greater than a value of the first cancellation threshold and is equal to or greater than a value of a second cancellation threshold different from the first cancellation threshold. Stop output of
The state determination device according to claim 1. The second release threshold is a substantially intermediate value between the first upper threshold and the lower threshold.
The state determination device according to claim 6. The output unit, when the attention information is being output, stops outputting the attention information based on a second upper threshold that is a value smaller than the first upper threshold,
Or, the output unit, when the attention information is being output, stops outputting the attention information based on another lower threshold that is a value greater than the lower threshold,
The state determination device according to claim 1. The output unit is configured to measure the measurement value of one of the plurality of measurement targets, the first release threshold set for the one measurement target, and another measurement different from the one measurement target. Stopping output of the attention information of the one measurement target based on the other measurement value of the target,
The state judging device according to claim 1. The output unit is configured to measure the measurement value of one of the plurality of measurement targets, the first release threshold set for the one measurement target, and another measurement different from the one measurement target. Stopping output of the caution information of the one measurement target, based on a relative value of the measurement value to another measurement value of the target,
The state judging device according to claim 1. The output unit outputs information output based on a threshold different from the attention information,
The state determination device according to claim 1. The output unit is configured to stop outputting the caution information based on a duration in which the measured value is equal to or greater than the first upper threshold value.
Or, based on the duration of the measured value is equal to or less than the value of the lower threshold, to stop outputting the attention information,
The state determination device according to claim 1. The output unit, based on the number of times the measured value is equal to or more than the first upper threshold value, stops outputting the attention information,
Or, based on the number of times the measured value is equal to or less than the value of the lower threshold, stop outputting the attention information,
The state determination device according to claim 1. Get the measurement value of the measurement target,
If the acquired measurement value is a value outside the range of the first upper threshold value and the lower threshold value, output caution information;
During the output of the caution information, the measurement value is output for the caution information while referring to a value of a first cancellation threshold set to a value different from the first upper threshold and the lower threshold during a predetermined time. To stop the
State determination method. An acquisition unit for acquiring a measurement value of a measurement target,
When the acquired measurement value is a value outside the range of the first upper threshold value and the lower threshold value, the caution information is output. During the output of the caution information, the measurement value is the predetermined value for the predetermined time. Output means for stopping output of the attention information by referring to a value of a first release threshold set to a value different from the upper limit threshold of 1 and the lower limit threshold,
A state determination program that causes a computer to function as

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