WO2022123651A1 - 計測システム、計測方法、計測装置、及び、プログラム - Google Patents
計測システム、計測方法、計測装置、及び、プログラム Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
- H04Q9/04—Arrangements for synchronous operation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6802—Sensor mounted on worn items
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
- A61B5/0015—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by features of the telemetry system
- A61B5/002—Monitoring the patient using a local or closed circuit, e.g. in a room or building
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
- A61B5/0015—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by features of the telemetry system
- A61B5/0022—Monitoring a patient using a global network, e.g. telephone networks, internet
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
- A61B5/024—Measuring pulse rate or heart rate
- A61B5/02438—Measuring pulse rate or heart rate with portable devices, e.g. worn by the patient
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
- A61B5/024—Measuring pulse rate or heart rate
- A61B5/0245—Measuring pulse rate or heart rate by using sensing means generating electric signals, i.e. ECG signals
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Measuring devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor or mobility of a limb
- A61B5/112—Gait analysis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/30—Input circuits therefor
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/30—Input circuits therefor
- A61B5/301—Input circuits therefor providing electrical separation, e.g. by using isolating transformers or optocouplers
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
- A61B5/332—Portable devices specially adapted therefor
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
- A61B5/333—Recording apparatus specially adapted therefor
- A61B5/335—Recording apparatus specially adapted therefor using integrated circuit memory devices
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
- A61B5/346—Analysis of electrocardiograms
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/02—Operational features
- A61B2560/0204—Operational features of power management
- A61B2560/0209—Operational features of power management adapted for power saving
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/02—Operational features
- A61B2560/0242—Operational features adapted to measure environmental factors, e.g. temperature, pollution
Definitions
- the present invention relates to a measurement system, a measurement method, a measurement device, and a program for obtaining a measurement result together with a measurement time.
- Patent Document 1 describes that a wearable device measures a heart rate or the like from a heart potential, which is an action potential of the heart, and the measurement results obtained by the measurement are transferred to a smartphone or the like in real time. Techniques for transmission or recording in memory are disclosed.
- Wearable sensors that can be worn on a daily basis are required to be small and lightweight, and the capacity of the battery is limited. Therefore, in order to perform measurement over a long period of time, it is necessary to measure with low power consumption.
- the correspondence between each measurement result and the user's activity is managed by the time. For this management, it is desirable that the measurement results are managed together with the accurate measurement time.
- the timing of measurement is generally managed by a clock signal. In order to manage the measurement time accurately as described above, if a highly accurate clock signal is used for the measurement, the power consumption will increase.
- the measurement system is configured to perform measurement a plurality of times based on a first clock signal having a first clock period and obtain a plurality of measurement results.
- a second clock period longer than the first clock period is provided for each of the measured measurement unit and a part of the plurality of measurement results obtained by the measurement unit and two or more measurement results, and the first clock period is longer than the first clock period.
- a time stamping unit configured to give a time stamp indicating a measurement time based on a second clock signal having a better cycle accuracy than one clock signal, and a part of the time stamping unit and two or more measurement results are given.
- the measurement result obtained during the period depends on the period specified by the two time stamps of the time stamps and the number of measurement results obtained during the period among the plurality of measurement results.
- a measurement time correction unit configured to correct the measurement time of the measurement result other than the measurement result to which the time stamp is given is provided.
- the measurement method includes a measurement step of performing measurement a plurality of times based on a first clock signal having a first clock period to obtain a plurality of measurement results, and the plurality of measurement steps obtained by the measurement step.
- a second clock signal having a second clock period longer than the first clock period and having a better cycle accuracy than the first clock signal for a part of the measurement results and each of two or more measurement results.
- a time stamping step for adding a time stamp indicating a measurement time based on the time stamp, a period specified by two time stamps among the time stamps given to each of the partial and two or more measurement results, and a plurality of the time stamps.
- the measurement time of the measurement results obtained during the period other than the time stamped measurement results is determined. It has a measurement time correction step for correction.
- the measuring device includes a measuring unit configured to perform measurement a plurality of times based on a first clock signal having a first clock period and obtain a plurality of measurement results, and the measuring unit.
- a time stamping unit configured to give a time stamp indicating a measurement time based on a second clock signal, wherein the time stamp is a part of the time stamp given to each of two or more measurement results.
- the measurement results are configured to be used to correct the measurement time of the measurement results other than the measurement results to which the time stamp is attached. It also has a time stamping unit.
- the program according to the fourth aspect of the present invention includes a plurality of measurement results obtained by performing measurements a plurality of times based on a first clock signal having a first clock period, and a part of the plurality of measurement results.
- the time stamp indicating the time stamp, the period specified by two time stamps of the time stamps given to each of the partial and two or more measurement results, and the said time among the plurality of measurement results. It is configured to correct the measurement time of the measurement results obtained during the period other than the measurement results to which the time stamp is attached, according to the number of measurement results obtained during the period. It functions as a measured time correction unit.
- a measurement result with a measurement time having a small time lag with respect to the actual time can be obtained with low power consumption.
- FIG. 1 is a hardware configuration diagram of a measurement system according to an embodiment of the present invention.
- FIG. 2 is a block diagram showing a configuration of a measurement system according to an embodiment of the present invention.
- FIG. 3 is a diagram showing a configuration example of a measurement result column and a time stamp.
- FIG. 4 is a flowchart of the measurement time correction process executed by the measurement time correction unit of FIG.
- FIG. 5 is a schematic diagram for explaining a process of deleting a measurement result from the measurement result column in the measurement time correction process of FIG. 4, and is a schematic diagram before deleting the measurement result.
- FIG. 5 is a schematic diagram for explaining a process of deleting a measurement result from the measurement result column in the measurement time correction process of FIG.
- FIG. 7 is a schematic diagram for explaining a process of adding a measurement result to the measurement result column in the measurement time correction process of FIG. 4, and is a schematic diagram before adding the measurement result.
- FIG. 8 is a schematic diagram for explaining a process of adding a measurement result to the measurement result column in the measurement time correction process of FIG. 4, and is a schematic diagram after adding the measurement result.
- FIG. 9 is a diagram showing an example of a process of adding a measurement result to the measurement result column in the measurement time correction process of FIG.
- FIG. 10 is a diagram showing another example of the process of adding the measurement result to the measurement result column in the measurement time correction process of FIG.
- FIG. 11 is a diagram showing another example of the process of deleting the measurement result from the measurement result column in the measurement time correction process of FIG.
- FIG. 12 is a diagram showing a data structure in which the measurement time is associated with each measurement result in the measurement result column.
- the measurement system 10 shown in FIGS. 1 and 2 is possessed by the user, and periodically measures the user's biological information and the environmental information around the user a plurality of times, and each measurement is the measured biological information and the environmental information. Manage the results together with the measurement time.
- Biometric information includes heart rate, RRI (RR Interval), which is the interval between two R waves in the electrocardiogram waveform, steps, and posture.
- Environmental information includes temperature.
- the measurement system 10 includes a sensor device 20 and a management device 30.
- the sensor device 20 comprises a wearable sensor worn on the user's clothes, and periodically measures the above-mentioned biological information and environmental information.
- the management device 30 is composed of a computer such as a smartphone owned by the user, and stores and manages each measurement result obtained by periodic measurement by the sensor device 20.
- the sensor device 20 includes a storage device 21, a processor 22, a RAM (RandomAccessMemory) 23, a first oscillation circuit 25, a second oscillation circuit 26, a electrocardiogram sensor 27A, an acceleration sensor 27B, a temperature sensor 27C, and a battery BT.
- the electric power required for the operation of the sensor device 20 is supplied from the battery BT made of a battery.
- the storage device 21 is a non-volatile storage device such as a hard disk, a flash memory, or an SSD (Solid State Drive), and stores programs and data.
- the processor 22 executes or uses the program and data stored in the storage device 21 to perform various processes such as measurement of the biometric information and the environmental information (details will be described later).
- the processor 22 includes an RTC (Real-Time Clock) that holds the current time.
- the RAM 23 is the main memory of the processor 22.
- the first oscillation circuit 25 oscillates a first clock signal having a first clock cycle and supplies it to the processor 22.
- the processor 22 measures the user's biological information and environmental information based on the first clock signal (see the measurement unit 22A described later).
- the second oscillation circuit 26 oscillates a second clock signal having a second clock cycle longer than the first clock cycle and having a cycle accuracy higher than that of the first clock signal, and supplies the second clock signal to the processor 22.
- the periodic accuracy can also be said to be the accuracy of the clock frequency.
- the RTC of the processor 22 updates the current time every second based on the second clock signal.
- the RTC for example, divides the second clock signal and updates it every second.
- the processor 22 assigns the current time updated by the RTC as a time stamp to the measurement result of the measurement based on the first clock signal (see the time stamping unit 22B described later).
- the time stamp indicates the measurement time of the given measurement result.
- the electrocardiographic sensor 27A, the acceleration sensor 27B, and the temperature sensor 27C are used to measure the biometric information and the environmental information.
- the electrocardiographic sensor 27A is configured to include a bioelectrode that comes into contact with the user's skin, and under the control of the processor 22, the electrocardiographic potential of the user is detected by the bioelectrode and supplied to the processor 22.
- the processor 22 measures the heart rate and RRI of the biometric information based on the electrocardiographic potential.
- the acceleration sensor 27B detects the acceleration under the control of the processor 22, and supplies the detected acceleration to the processor 22.
- the processor 22 measures the number of steps and the posture of the biometric information based on the acceleration.
- the air temperature sensor 27C detects the air temperature included in the environmental information under the control of the processor 22, and supplies the detected air temperature to the processor 22.
- the management device 30 includes a storage device 31, a processor 32, a RAM 33, and an input / output device 35.
- the storage device 31 is a non-volatile storage device such as a hard disk, a flash memory, or an SSD, and stores programs and data.
- the processor 32 executes or uses the program and data stored in the storage device 31 to perform various processes such as management of the measurement results (details will be described later).
- the RAM 33 is the main memory of the processor 32.
- the input / output device 35 includes a touch panel and the like.
- the sensor device 20 and the management device 30 each have a communication module (not shown) and are configured to enable wireless or wired communication with each other.
- the sensor device 20 includes a measuring unit 22A and a time stamping unit 22B.
- Each unit 22A and 22B is composed of a processor 22 (FIG. 1) that executes a program stored in the storage device 21.
- the first clock signal is input from the first oscillation circuit 25 to the measurement unit 22A.
- the measuring unit 22A operates based on the first clock signal, and periodically measures biological information and environmental information for a long period of time. For example, the measurement unit 22A counts the rising edge of the pulse of the first clock signal and operates every time the count value reaches a predetermined value, so that the measurement unit 22A operates every 1 msec.
- the measurement unit 22A may divide the first clock signal up to 1 kHz and operate every 1 ms based on the divided clock signal.
- the first clock period of the first clock signal that realizes the operation every 1 ms is shorter than the second clock period (generally, 1/32768 seconds) of the second clock signal used for the RTC.
- the measuring unit 22A periodically detects the electrocardiographic potential by the electrocardiographic potential sensor 27A.
- the detection may be performed, for example, at any time within the range of 1 to 8 msec.
- the measurement unit 22A performs a detection operation at one operation timing, that is, every 1 ms.
- the detected electrocardiographic potential is held in the RAM 23 (FIG. 1) for the past fixed period from the latest one, and is used for RRI and heart rate measurement.
- the measuring unit 22A detects the R wave based on the change in the electrocardiographic potential.
- the measuring unit 22A measures the RRI by specifying the time interval between the two R waves.
- each period such as a time interval is specified by the number of electrocardiographic potentials detected within that period ⁇ the detection cycle (here, 1 msec) in which the measuring unit 22A detects the electrocardiographic potential.
- the RRI is specified by the number of new potentials detected x the detection period between the two R waves.
- the detection cycle is a cycle based on the first clock cycle when there is no error in the first clock cycle.
- the number of RRIs contained in one second varies depending on the heart rate and is about 0 to 5.
- the measuring unit 22A measures the heart rate by counting the number of R waves per 60,000 heart potentials, that is, per 60 seconds. In this way, the measuring unit 22A measures the heart rate and the RRI based on the first clock signal.
- the measurement unit 22A periodically detects the acceleration by the acceleration sensor 27B.
- the sampling frequency for specifying the number of steps and the posture may be about 20 Hz. Therefore, the measurement unit 22A detects the acceleration every 5 msec of the operation timing, that is, every 5 msec. This reduces power consumption and the amount of data.
- the detected acceleration is held in the RAM 23 for the past fixed period from the latest one, and is used for measuring the number of steps and the posture.
- the measuring unit 22A measures the number of steps and the posture based on the change in acceleration.
- the number of steps is the number of walking steps.
- the posture measurement is performed by, for example, referring to a table pre-recorded in the storage device 21 and classifying the change mode of the acceleration into any posture classification code from 00 to 04.
- 00 indicates the supine position
- 01 indicates the sitting position
- 02 indicates the standing position
- 03 indicates walking
- 04 indicates running.
- the measuring unit 22A periodically measures the temperature by the air temperature sensor 27C. Since the temperature does not change abruptly, the measurement interval may be, for example, every 1000 times of operation timing every 1 msec, that is, every 1 second. This reduces the power consumption and the amount of data for measurement.
- the measuring unit 22A may detect the electrocardiographic potential at 1 msec intervals based on the first clock signal, detect the acceleration every 5 times the electrocardiographic potential is detected, and measure the temperature every 1000 times the electrocardiographic potential is detected. .. As a result, since the first clock signal is shared by a plurality of types of detection and measurement, the measurement unit 22A can efficiently perform the plurality of types of detection and measurement in synchronization.
- the measurement unit 22A measures each of the heart rate, RRI, step count, posture, and air temperature every 1000 times of the operation timing of 1 msec based on the first clock cycle, that is, every second. In this way, the measurement unit 22A periodically performs measurement a plurality of times in a measurement cycle T cycle (1 second) based on the first clock signal, and obtains a plurality of measurement results.
- the measuring unit 22A records the measured heart rate, RRI, step count, posture, and temperature value as one measurement result in the storage device 21 for each measurement. As a result, 3600 measurement results are recorded in the storage device 21 in one hour. The measurement results are recorded in chronological order.
- the measuring unit 22A counts the number of measurement results recorded in the storage device 21 by using the counter provided in the RAM 23.
- the measurement unit 22A records the 3600 measurement results in the storage device 21 every hour when the counter value becomes 3600, that is, every hour, the measurement results as shown in FIG. It is transmitted to the management device 30 as a column. With this transmission as a trigger, the measurement result column is deleted from the storage device 21, and the counter is reset. Twenty-four measurement result columns will be generated in 24 hours.
- the measurement result column 3600 measurement results are arranged in the order of measurement.
- a time stamp is added to the measurement result column.
- the time stamp is given by the time stamping unit 22B as described later, and indicates the measurement time of the first measurement result in the measurement result column.
- the time stamp is transferred together with the measurement result column when the measurement result column is transferred.
- the time stamping unit 22B shown in FIG. 2 is configured to include the RTC of the processor 22, and assigns the current time updated by the RTC to the measurement result column as a time stamp indicating the measurement time.
- the RTC updates the current time based on the second clock signal. Therefore, the time stamping unit 22B adds the time stamp to the measurement result column based on the second clock signal.
- the time stamping unit 22B operates based on the first clock signal, the internal clock signal of the processor 22, or the like, and at the timing when the first measurement result is obtained from the 3600 measurement results constituting the measurement result sequence.
- the current time is read from the RTC. For example, the current time is read out each time the count value of the counter that counts the number of measurement results recorded in the storage device 21 becomes 1.
- the time stamping unit 22B assigns this time stamp to the first measurement result by storing the read current time as a time stamp in the storage device 21 in association with the first measurement result. This time stamp indicates the measurement time of the first measurement result.
- the time stamp is given to the entire measurement result column. It can be said that the time stamp indicates the measurement start time in the measurement result column.
- the measurement time of each measurement result included in the measurement result column with the time stamp is the measurement time Timestamp indicated by the time stamp, the order P in the measurement result column of the measurement result, and when there is no periodic error. It is specified by a measurement cycle T cycle based on the first clock signal.
- the measurement time of each measurement result included in the measurement result column is specified based on the time stamp and the measurement cycle T cycle .
- the measurement cycle T cycle is a fixed value, the measurement time is assigned not only to the first measurement result but also to the second and subsequent measurement results by adding the time stamp.
- the measurement cycle T cycle is based on the first clock cycle of the first clock signal, and the cycle accuracy of the first clock cycle is lower than that of the second clock cycle. Therefore, a periodic error may occur in the first clock signal, which also causes an error in the measurement cycle T cycle . As a result, an error may occur in the measurement time of each of the second and subsequent measurement results included in the measurement result column. Therefore, in the present embodiment, the measurement time given to each measurement result on the sensor device 20 side is corrected on the management device 30 side.
- the management device 30 includes a measurement result recording unit 32A, a measurement time correction unit 32B, a measurement result correction unit 32C, and a measurement result usage unit 32D.
- Each unit 32A to 32D is composed of a processor 32 (FIG. 1) that executes a program stored in the storage device 31.
- the measurement result recording unit 32A sequentially receives the measurement result column and the time stamps given to the measurement result column transmitted from the sensor device 20 every hour, and sequentially records them in the storage device 31 in chronological order.
- the measurement time correction unit 32B has a measurement result other than the measurement result of the measurement time indicated by the time stamp given to the measurement result column among the 3600 measurement results included in the measurement result column recorded in the storage device 31. That is, the measurement time of each of the 2nd to 3600th measurement results other than the 1st measurement result to which the time stamp is associated is corrected.
- the measurement time correction unit 32B corrects the measurement time by, for example, executing the measurement time correction process shown in FIG.
- the measurement time correction process is performed at an arbitrary timing after two or more measurement result sequences are recorded in the storage device 31.
- the measurement time correction process is performed on each measurement result column stored in the storage device 31.
- the order of the measurement result columns to be processed in chronological order is the Xth.
- the measurement time correction unit 32B sets the measurement period Term in which 3600 measurement results are obtained by 3600 measurements for obtaining the Xth measurement result column. It is specified by the time stamp given to each of the X + 1st measurement result columns (step S11). As described above, each time stamp given to the measurement result column indicates the measurement time of the first measurement result in the measurement result column. Therefore, in step S11, the measurement period Term of the Xth measurement result column is specified by obtaining the period of the difference obtained by subtracting the measurement time indicated by the Xth time stamp from the measurement time indicated by the X + 1th time stamp. Will be done.
- the numerical value M is obtained by the following equation 2 (step S12).
- int (x) in the following equation (2) is an integerization operation of x. Since x, that is, T term / T cycle is a positive value, int (x) is a value rounded down to the nearest whole number of x.
- M int (T term / T cycle ) -N ...
- int (T term / T cycle ) specifies the number of measurements or the number of measurement results performed in the measurement cycle T cycle when there is no cycle error of the first clock signal in the measurement period T term . If int ( Time / T cycle ) is 3600, it means that no periodic error has occurred in the first clock signal, and M is 0.
- the measurement time correction unit 32B determines whether the value of M is negative (step S13).
- M is a negative value (step S13 ; Yes)
- M more than the number of measurement results that should have been originally obtained by T term . Therefore, the measurement cycle T cycle is shorter than 1 second when there is no cycle error. Therefore, when M is a negative value, the measurement time correction unit 32B performs a process of deleting
- the measurement cycle T cycle is corrected to the original 1 second without cycle error, and as a result, the measurement time of each measurement result in the Xth measurement result column is set to the measurement time calculated by the above equation (1). It has been corrected.
- the measurement cycle T cycle including the cycle error is about 0.3% shorter than the original measurement cycle T cycle without the cycle error, based on the second clock signal having a smaller cycle error than the first clock signal. , About 0.997 seconds. Therefore, the first clock period is also shorter by that amount.
- the measurement cycle T cycle is corrected to the original 1 second.
- the measurement time correction unit 32B adds M new measurement results to the Xth measurement result column (step S16).
- the measurement cycle T cycle is corrected to the original 1 second, and as a result, the measurement time of each measurement result in the Xth measurement result column is corrected to the measurement time calculated by the above equation 1. ..
- the measurement cycle T cycle including the cycle error is about 0.3% longer than the original measurement cycle T cycle without the cycle error, based on the second clock signal having a smaller cycle error than the first clock signal. , About 1.003 seconds. Therefore, the first clock cycle is also longer by that amount.
- the measurement time correction unit 32B brings the number of measurement results constituting the Xth measurement result sequence close to the number of measurement results originally obtained in the measurement period Term when no periodic error occurs in the first clock signal. As such (including matching), the measurement results may be deleted or added, and the method is arbitrary.
- the position where the measurement result is added or deleted is arbitrary with respect to the measurement result column, but the contents of the measurement result column do not change significantly before and after the addition or deletion of the measurement result.
- the positions should be dispersed within the measurement result column.
- the positions are arranged so that one or a plurality of measurement results are sandwiched between the positions.
- each position is evenly distributed in the measurement result column, and the number of measurement results between the insertion positions or the number of measurement results between the deletion positions is the same. More specifically, the measurement result is added or deleted for each N / (
- N 3600
- 10
- the measurement result is added after the 1308th, 1635th, 1962th, 2289th, 2616th, 2943th, and 3270th measurement results.
- the process of deleting the measurement results in the above order may be performed in the same manner as described above.
- the content of the added measurement result shall correspond to the content of each of the Hth and H + 1th measurement results before and after that.
- the average value of the values in the measurement results before and after is adopted for the types of values that are recorded regularly and the values change continuously, such as heart rate and temperature.
- the numerical value may be the same as the numerical value in the measurement result column before or after.
- Steps: 1) may be transferred to the measurement result to be added.
- the content of the deleted measurement result may be distributed to the H-1st and H + 1th measurement results before and after that.
- the measurement time correction unit 32B adds or deletes the measurement result to the measurement result column, the content of only the measurement result before, after, or both of the positions where the measurement result is added or deleted. Use to add or delete measurement results. This makes it possible to correct the measurement time with a small amount of processing even for a large amount of measurement results recorded over a long period of time.
- the measurement result correction unit 32C shown in FIG. 2 corrects a time interval such as RRI measured based on the first clock signal among the measurement results of the measurement result sequence stored in the storage device 31.
- a cycle error occurs in the first clock cycle of the first clock signal, an error also occurs in the RRI numerical value. Therefore, the measurement result correction unit 32C corrects the error by using the time stamp.
- the measurement result correction unit 32C obtains the measurement cycle based on the first clock signal when there is no cycle error in T cycle , and the measurement period which is the difference between the two time stamps in T term and T term .
- the correction coefficient C calculated by the following equation 3 is multiplied by the RRI to correct the RRI.
- C T term / (T cycle ⁇ N) ⁇ ⁇ ⁇ (3)
- the correction coefficient C is about 1.003, which is calculated. Multiplying the RRI by 800 msec gives 802 msec as the corrected RRI.
- the measurement result use unit 32D performs various processes using the measurement result sequence and the time stamp stored in the storage device 31. For example, the measurement result use unit 32D displays a graph or the like showing the relationship between the corrected measurement time and the measurement result on the input / output device 35. At this time, the measurement result use unit 32D displays the activity content of the user separately input to the management device 30 together with the time in association with the measurement result (for example, heart rate) with the time as a common axis. Further, the measurement result user unit 32D analyzes the user's health and the like based on the relationship between the user's activity content and the measurement result (for example, heart rate), with the time being common.
- the measurement result use unit 32D analyzes the user's health and the like based on the relationship between the user's activity content and the measurement result (for example, heart rate), with the time being common.
- the sensor device 20 since the sensor device 20 is a wearable sensor, the measurement of the biological information and the environmental information is continuously performed for a long time. In this case, the first oscillation circuit that oscillates the first clock signal needs to be constantly operated. On the other hand, since the battery BT of the sensor device 20 is small, its capacity is also limited. Therefore, the first oscillation circuit 25 is required to have low power consumption so that it can operate for a long time with a small battery BT. However, in general, there is a trade-off relationship between the periodic accuracy of the clock signal and the power consumption, and if a low power consumption oscillation circuit is used, the periodic accuracy is reduced.
- the period accuracy of the first clock signal is ⁇ 1%, there is a possibility that a deviation of about 14 minutes from the actual time will occur if the measurement corresponding to 24 hours is performed based on the first clock signal. ..
- a time lag with respect to real time occurs, there is a problem that it becomes difficult to display or analyze, for example, the measured heart rate and the activity at that time.
- the time stamping unit 22B has the measurement cycle T among a plurality of measurement results obtained by a plurality of measurements by the measurement unit 22A in the measurement cycle T cycle , particularly the same type of measurement such as the heart rate.
- a second clock cycle longer than the first clock cycle For each measurement result obtained in a cycle longer than cycle (here, 1 measurement result sequence, that is, a cycle for obtaining measurement results of N (for example, N is an integer of 2 or more)), a second clock cycle longer than the first clock cycle.
- a time stamp indicating the measurement time is given based on the second clock signal having two clock periods and having a cycle accuracy higher than that of the first clock signal.
- the measurement time correction unit 32B is obtained during the measurement period T term of the measurement result column specified by the two time stamps given to the Xth and X + 1th measurement result columns, respectively, and during the measurement period T term .
- the measurement time of the 2nd to 3600th measurement results other than the 1st measurement result to which the time stamp is given in the measurement result column is corrected according to the number of measurement results. Since the second clock signal has better cycle accuracy than the first clock signal, the time lag of the measured time corrected based on the time stamp as described above with respect to the actual time is small.
- the power consumption of the first oscillation circuit 25 and the second oscillation circuit 26 is suppressed. Is low. As described above, according to this embodiment, it is possible to obtain a measurement result with a measurement time having a small time lag with respect to the real time with low power consumption.
- the time stamping unit 22B adds a time stamp to the first measurement result of each of the plurality of measurement result columns.
- Specify the term and delete the measurement result or add a new measurement result to the measurement result column consisting of N measurement results according to the length of the specified measurement period T term , and add the measurement result column.
- the measurement time of each measurement result is corrected by approaching the number of the constituent measurement results to the number of measurement results originally obtained in the measurement period T term when the first clock signal does not have a periodic error.
- the data capacity required for recording the time stamp increases, but for one measurement result column consisting of a plurality of N measurement results.
- By adding one time stamp it is possible to improve the efficiency of recording. This makes it possible to record the measurement result for a longer period of time with respect to the recordable capacity, and also suppresses the amount of transmission data when the recorded measurement result is transmitted from the sensor device 20 to the management device 30. , The effect of suppressing power consumption related to communication can also be obtained.
- the time stamping unit 22B does not use the measurement result column, and performs the first measurement result and the last measurement result among all the measurement results from the start to the end of the measurement in the predetermined measurement period to the above-mentioned measurement cycle T cycle .
- Time stamps may be added to these as measurement results obtained in a longer cycle.
- by dividing all the measurement results in the measurement result column and assigning a time stamp to each it is higher even when the cycle accuracy of the first clock signal fluctuates due to the influence of heat or the like.
- the measurement time can be corrected accurately.
- the time stamping unit 22B interrupts the measurement due to a user operation or the like during a predetermined measurement period or while obtaining the measurement results constituting the measurement result column, the time stamp is stamped at that time.
- the measurement time may be corrected based on the period of difference between the time stamp given to the first measurement result and the time stamp given to the last measurement result.
- the time stamping unit 22B may add a time stamp to each of the first measurement result and the last measurement result in the measurement result column of 1.
- the time stamping unit 22B may, for example, assign a time stamp to a part of the plurality of measurement results obtained by the plurality of measurements and to each of two or more measurement results.
- each measurement result is a second type different from the first type measurement result that occurs irregularly such as RRI and the number of steps and the first type that takes a continuous numerical value such as a heart rate.
- the measurement time correction unit 32B is configured not to delete the result of the first type of measurement when the measurement result is deleted. This prevents inconsistencies in the measurement results before and after deletion. In particular, when the measurement result including the result of the first type of measurement is deleted, the discrepancy can be effectively suppressed by shifting the result of the first type of measurement to the previous and next measurement results.
- the measurement time correction unit 32B deletes
- the measurement result includes a time interval such as RRI measured based on the first clock signal, and the measurement result correction unit 32C uses the correction coefficient C calculated by the above equation (3).
- the time interval is corrected by multiplying the time interval measured by the measuring unit 22A. As a result, a time interval with good accuracy can be obtained.
- the hardware configuration of the measurement system 10 is arbitrary.
- the sensor device 20 may include a pulse wave sensor that is worn on the wrist and detects a pulse waveform, and a measurement unit that measures a pulse from the pulse waveform.
- the sensor device 20 may include a sensor and a measuring unit for measuring SpO2 (percutaneous arterial oxygen saturation).
- the sensor device 20 may include, in addition to or instead of the air temperature sensor 27C, another environment sensor capable of measuring humidity, barometric pressure, and the like.
- the sensor device 20 may include a body motion sensor that measures the number of steps, posture, or the like from acceleration, angular velocity, or the like.
- the measuring unit 22A may be configured by a device in which each sensor such as a electrocardiographic potential sensor 27A, an environment sensor, or a body motion sensor and a control unit such as a processor are integrated.
- the sensor device 20 may be a measuring device other than the wearable sensor.
- the measurement target of the measurement system 10 is not limited to the biometric information of the user and is arbitrary. Even if the sensor device 20 is not a wearable sensor or the like and the battery BT is not small, it is better that the power consumption by the measurement is small. Therefore, the trade-off relationship between the period accuracy of the clock signal and the power consumption described above can be generally said for measurement. Therefore, even if the sensor device 20 is a measurement device other than the wearable sensor, the measurement system 10 can obtain a measurement result with a measurement time having a small time lag with respect to the real time with low power consumption. It works.
- the management device 30 may be a server computer or the like that communicates with, for example, a sensor device 20 other than a smartphone via a predetermined network.
- the measurement system 10 may be configured as one device in which the respective parts 22A and 22B of the sensor device 20 and the respective parts 32A to 32D of the management device 30 are arranged in one housing.
- the measurement time correction unit 32B and the measurement result correction unit 32C may be configured by the processor 22 of the sensor device 20.
- the processing load of the sensor device 20 can be reduced.
- At least a part of each part 22A and 22B of the sensor device 20 and each part 32A to 32D of the management device 30 may be realized by the cooperation of one processor or a plurality of processors as a whole.
- Computer-readable storage media include hard disks, flash memories, or non-temporary storage media such as SSDs (Solid State Drives).
- the type of measurement result and the measurement cycle are not limited to the above-described embodiment.
- the measurement result obtained by longer-term measurement is stored in the storage device 21 or. It may be recorded in the device 31.
- the electrocardiographic potential or the like may be measured and the waveform data of the electrocardiogram may be recorded in the storage device 21 or the storage device 31.
- the type of measurement and the measurement cycle may be set by the user.
- the first oscillation circuit that oscillates the first clock signal is a clock oscillation circuit included in an A / D (Analog-to-Digital) conversion IC (Integrated Circuit) for measurement included in the electrocardiographic sensor 27A or the like. It is also good.
- the measuring unit 22A includes the electrocardiographic sensor 27A and the like, and measures the electrocardiographic potential and the like using the clock signal of the A / D conversion IC as the first clock signal, and the time stamping unit 22B measures by measurement. A time stamp may be added to the obtained measurement result such as the electrocardiographic potential.
- the second oscillation circuit may be a real-time clock IC provided separately from the processor 22. In this case, the time stamping unit 22B may be configured to include the real-time clock IC.
- the time stamping unit 22B may add a time stamp to the measurement result obtained at that time at regular intervals (for example, every hour) instead of the number of measurement results. Then, the measurement time correction unit 32B specifies the number of measurement results obtained in a certain period, and according to the specified number, the measurement result is obtained for the measurement result column consisting of the measurement results obtained in the fixed period. May be configured to correct the measurement time by deleting or adding a new measurement result.
- the measurement time correction unit 32B is, for example, when the number of specified measurement results is N, the measurement cycle based on the first clock signal when there is no cycle error is T cycle , and the fixed period is T term (fixed value). In addition, M measurement results are added or deleted according to the positive / negative of M obtained by the above equation (2).
- the measurement time correction unit 32B When M is positive, the measurement time correction unit 32B has the specified number N of measurement results with respect to the number of original measurement results obtained in the fixed period when there is no periodic error in the first clock signal. It can be said that there are M less. In this case, the measurement time correction unit 32B adds M measurement results. When M is negative, the measurement time correction unit 32B can say that the number N of the specified measurement results is
- the measurement time correction unit 32B may record each measurement result in the corrected measurement result column and the measurement time of each measurement result in the storage device 31 in association with each other. good.
- the measurement time of each measurement result is calculated by, for example, the above equation (1).
- the measurement time correction unit 32B calculates a numerical value obtained by dividing the period in which the measurement results constituting the measurement result column specified by the time stamp are obtained by the number of measurement results obtained in the period, and the actual value in the period is calculated.
- the measurement cycle of may be calculated.
- the measurement time correction unit 32B may correct the measurement time of each measurement result in the measurement result column based on the measurement cycle without deleting or adding the measurement result to the measurement result column.
- the measurement time Tm of each measurement result may be calculated by the above equation (1) in which the measurement cycle calculated above is T cycle . Even if the measurement time correction unit 32B records each instrumentation result in the measurement result column and the measurement time of each measurement result calculated above in association with each other in the storage device 31, as in the modified example 5. good.
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Abstract
Description
図1及び図2に示す計測システム10は、ユーザにより所持され、ユーザの生体情報及び当該ユーザの周囲の環境情報を定期的に複数回計測し、計測した各生体情報及び環境情報である各計測結果を計測時刻とともに管理する。生体情報は、心拍数、心電図波形における2つのR波の間隔であるRRI(R-R Interval)、歩数、及び、姿勢を含む。環境情報は、気温を含む。
Tm=Ttimestamp+Tcycle×(P-1)・・・(1)
により得られる。例えば、図3の計測結果列における3番目の計測結果の計測時刻Tmは、2020年11月13日16時45分30秒+1秒×(3-1)=2020年11月13日16時45分32秒である。
M=int(Tterm/Tcycle)-N・・・(2)
int(Tterm/Tcycle)により、計測期間Ttermにおいて、第1クロック信号の周期誤差がないとするときの計測周期Tcycleで行われる計測の回数ないし計測結果の数が特定される。int(Tterm/Tcycle)が3600であれば第1クロック信号において周期誤差を生じていないことになり、Mは0となる。
C=Tterm/(Tcycle×N)・・・(3)
この実施の形態では、センサ装置20がウェアラブルセンサなので、上記生体情報及び環境情報の計測が長時間連続して行われる。この場合、第1クロック信号を発振する第1発振回路は、常時動作させておく必要がある。他方、センサ装置20のバッテリBTは、小型であるため、その容量も限られる。そのため、第1発振回路25は、小型なバッテリBTで長時間動作できるよう、低消費電力が求められる。ところが、一般にクロック信号の周期精度と消費電力の間にはトレードオフの関係があり、低消費電力な発振回路を利用すると周期精度が低減する。仮に第1クロック信号の周期精度が±1%であった場合、第1クロック信号に基づいて24時間に相当する計測を行うと、実時間に対して約14分のずれが生じる可能性がある。このような実時間に対する時刻ずれが生じると、例えば計測した心拍数と、そのときの活動とを紐づけた表示又は分析を行うことが困難になるといった問題がある。
本発明は、上記実施の形態に限定されない。上記の実施形態については、種々の変更が可能である。以下、変形例を列挙するが、各変形例同士は、矛盾が無い限り、少なくとも一部同士で組み合わせ可能である。
計測システム10のハードウェア構成は任意である。例えば、センサ装置20は、手首に装着されて脈波形を検出する脈波センサと、脈波形から脈拍を計測する計測部と、を備えてもよい。センサ装置20は、SpO2(経皮的動脈血酸素飽和度)を計測するためのセンサ及び計測部を備えてもよい。センサ装置20は、気温センサ27Cの代わり又は加えて、湿度又は気圧などを計測可能な他の環境センサを備えてもよい。さらに、センサ装置20は、加速度及び角速度等から歩数又は姿勢等を計測する体動センサを備えてもよい。計測部22Aは、心電位センサ27A、環境センサ、又は、体動センサ等の各センサとプロセッサ等の制御部とが一体となった装置により構成されていてもよい。
計測結果の種類及び計測周期は、上記実施の形態に限定されるものではなく、例えば、計測周期を1分間隔とすることで、より長期間の計測で得られる計測結果を記憶装置21又は記憶装置31に記録してもよい。さらに、1m秒間隔で計測結果を記録することによって、心電位などを計測して心電図の波形データを記憶装置21又は記憶装置31に記録してもよい。計測の種類及び計測周期は、ユーザにより設定可能としてもよい。
第1クロック信号を発振する第1発振回路は、心電位センサ27A等に含まれる計測用のA/D(Analog-to-Digital)変換IC(Integrated Circuit)等に含まれるクロック発振回路であってもよい。この場合、計測部22Aは、心電位センサ27A等を含んで構成され、A/D変換ICのクロック信号を第1クロック信号として心電位等の計測を行い、タイムスタンプ付与部22Bは、計測により得られた心電位等の計測結果に対してタイムスタンプを付与してもよい。第2発振回路は、プロセッサ22とは別途で設けられたリアルタイムクロックICであってもよい。この場合、タイムスタンプ付与部22Bは、当該リアルタイムクロックICを含んで構成されてもよい。
タイムスタンプ付与部22Bは、計測結果の数ではなく、一定期間ごと(例えば、1時間ごと)に、そのとき得られた計測結果に対してタイムスタンプを付与してもよい。そして、計測時刻補正部32Bは、一定期間で得られた計測結果の数を特定し、特定した数に応じて、当該一定期間で得られた計測結果からなる計測結果列に対して前記計測結果を削除又は新たな計測結果を追加することで、計測時刻を補正するように構成されてもよい。計測時刻補正部32Bは、例えば、特定された計測結果の数をN、周期誤差がないときの第1クロック信号に基づく計測周期をTcycle、前記一定期間をTterm(固定値)としたときに、上記(2)式で得られるMの正負に応じてM個の計測結果を追加又は削除する。
計測時刻補正部32Bは、例えば、図12に示すように、補正後の計測結果列の各計測結果と、当該各計測結果の計測時刻と、をそれぞれ対応付けて記憶装置31に記録してもよい。各計測結果の計測時刻は、例えば、上記式(1)により算出される。
計測時刻補正部32Bは、タイムスタンプにより特定される、計測結果列を構成する計測結果が得られた期間を当該期間に得られた計測結果の数で割った数値を算出し、当該期間における実際の計測周期を算出してもよい。計測時刻補正部32Bは、計測結果列に対する計測結果の削除又は追加を行わず、前記計測周期に基づいて計測結果列の各計測結果の計測時刻を補正してもよい。例えば、各計測結果の計測時刻Tmは、前記で算出した計測周期をTcycleとする上記式(1)により算出されればよい。計測時刻補正部32Bは、変形例5のように、計測結果列の各計装結果と、前記で算出された各計測結果の計測時刻と、をそれぞれ対応付けて記憶装置31に記録してもよい。
Claims (8)
- 第1クロック周期を有する第1クロック信号に基づいて計測を複数回行って複数の計測結果を得るように構成された計測部と、
前記計測部により得られる前記複数の計測結果のうちの一部かつ2以上の計測結果それぞれに対し、前記第1クロック周期よりも長い第2クロック周期を有しかつ前記第1クロック信号よりも周期精度の良い第2クロック信号に基づいて計測時刻を示すタイムスタンプを付与するように構成されたタイムスタンプ付与部と、
前記一部かつ2以上の計測結果それぞれに付与された前記タイムスタンプのうち2つのタイムスタンプにより特定される期間と、前記複数の計測結果のうち前記期間中に得られた計測結果の数とに応じて、前記期間中に得られた前記計測結果のうち前記タイムスタンプが付与された前記計測結果以外の計測結果の計測時刻を補正するように構成された計測時刻補正部と、
を備える計測システム。 - 前記計測部により得られる前記複数の計測結果は、連続したN回の計測により得られるN個の計測結果を1の計測結果列とした複数の計測結果列を含み、
前記タイムスタンプ付与部は、前記複数の計測結果列それぞれの1番目の計測結果に前記タイムスタンプを付与するように構成されており、
前記計測時刻補正部は、前記2つのタイムスタンプの差により前記計測結果列の前記N個の計測結果が得られた計測期間を特定し、特定した前記計測期間の長さに応じて、前記計測結果列に対して前記計測結果を削除又は新たな計測結果を追加して当該計測結果列の計測結果の数を前記第1クロック信号に周期誤差がないときに前記計測期間で得られる計測結果の数に近づけることで、前記計測時刻を補正するように構成されている、
請求項1に記載の計測システム。 - 前記複数の計測結果それぞれは、第1種類の計測の結果と、前記第1種類とは異なる第2種類の計測の結果とを含むことがあり、
前記計測時刻補正部は、前記計測結果を削除する場合に、前記第1種類の計測の結果を削除しないように構成されている、
請求項2に記載の計測システム。 - 前記計測時刻補正部は、周期誤差がないときの前記第1クロック信号に基づく前記計測の周期をTcycle、前記計測期間をTtermとしたときに、下記の式(A)で得られるMが負である場合に|M|個の前記計測結果を前記計測結果列から削除し、前記Mが正である場合にM個の前記新たな計測結果を前記計測結果列に追加するように構成されている、
請求項2又は3に記載の計測システム。
M=int(Tterm/Tcycle)-N・・・(A)
但し、int(Tterm/Tcycle)は、Tterm/Tcycleで得られる値の整数化演算
- 前記計測結果は、前記第1クロック信号に基づいて計測された時間間隔を含み、
前記計測システムは、周期誤差がないときの前記第1クロック信号に基づく前記計測の周期をTcycle、前記計測期間をTtermとしたときに、下記の数式(B)で算出される補正係数Cを、前記時間間隔に乗じて当該時間間隔を補正するように構成された計測結果補正部をさらに備える、
請求項2~4のいずれか1項に記載の計測システム。
C=Tterm/(Tcycle×N)・・・(B)
- 第1クロック周期を有する第1クロック信号に基づいて計測を複数回行って複数の計測結果を得る計測ステップと、
前記計測ステップにより得られる前記複数の計測結果のうちの一部かつ2以上の計測結果それぞれに対し、前記第1クロック周期よりも長い第2クロック周期を有しかつ前記第1クロック信号よりも周期精度の良い第2クロック信号に基づいて計測時刻を示すタイムスタンプを付与するタイムスタンプ付与ステップと、
前記一部かつ2以上の計測結果それぞれに付与された前記タイムスタンプのうち2つのタイムスタンプにより特定される期間と、前記複数の計測結果のうち前記期間中に得られた計測結果の数とに応じて、前記期間中に得られた前記計測結果のうち前記タイムスタンプが付与された前記計測結果以外の計測結果の計測時刻を補正する計測時刻補正ステップと、
を有する計測方法。 - 第1クロック周期を有する第1クロック信号に基づいて計測を複数回行って複数の計測結果を得るように構成された計測部と、
前記計測部により得られる前記複数の計測結果のうちの一部かつ2以上の計測結果それぞれに対し、前記第1クロック周期よりも長い第2クロック周期を有しかつ前記第1クロック信号よりも周期精度の良い第2クロック信号に基づいて計測時刻を示すタイムスタンプを付与するように構成されたタイムスタンプ付与部であって、前記タイムスタンプが、前記一部かつ2以上の計測結果それぞれに付与したタイムスタンプのうち2つのタイムスタンプにより特定される期間中に得られた前記計測結果のうち前記タイムスタンプが付与された前記計測結果以外の計測結果の計測時刻を補正するのに使用される、ように構成されたタイムスタンプ付与部と、
を備える計測装置。 - 第1クロック周期を有する第1クロック信号に基づいて計測を複数回行って得られる複数の計測結果と、前記複数の計測結果のうちの一部かつ2以上の計測結果それぞれに対して、前記第1クロック周期よりも長い第2クロック周期を有しかつ前記第1クロック信号よりも周期精度の良い第2クロック信号に基づいて付与された、計測時刻を示すタイムスタンプと、を取得するコンピュータを、
前記一部かつ2以上の計測結果それぞれに付与された前記タイムスタンプのうち2つのタイムスタンプにより特定される期間と、前記複数の計測結果のうち前記期間中に得られた計測結果の数とに応じて、前記期間中に得られた前記計測結果のうち前記タイムスタンプが付与された前記計測結果以外の計測結果の計測時刻を補正するように構成された計測時刻補正部、
として機能させるプログラム。
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| CN202080107780.3A CN116648879B (zh) | 2020-12-08 | 2020-12-08 | 测量系统、测量方法、测量设备和计算机可读存储介质 |
| AU2020480642A AU2020480642B2 (en) | 2020-12-08 | 2020-12-08 | Measurement system, measurement method, measurement device, and program |
| US18/256,400 US20240016451A1 (en) | 2020-12-08 | 2020-12-08 | Measurement System, Measurement Method, Measurement Device, and Program |
| PCT/JP2020/045633 WO2022123651A1 (ja) | 2020-12-08 | 2020-12-08 | 計測システム、計測方法、計測装置、及び、プログラム |
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| WO2018151202A1 (ja) * | 2017-02-17 | 2018-08-23 | 日本電信電話株式会社 | センシングシステムおよびタイムスタンプ補正方法 |
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| CN103460072B (zh) * | 2011-04-05 | 2016-05-18 | 皇家飞利浦有限公司 | 具有改进的时间精度的利用时间数字转换的探测器阵列 |
| US9455885B2 (en) * | 2011-10-13 | 2016-09-27 | General Electric Company | Systems, methods, and apparatus for modifying sensor time stamp data |
| JP6076692B2 (ja) * | 2012-10-26 | 2017-02-08 | 株式会社東芝 | インバータ装置及びインバータシステム |
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| JP5994816B2 (ja) * | 2014-05-14 | 2016-09-21 | 株式会社デンソー | 回転電機制御システム |
| JP6648730B2 (ja) * | 2017-05-09 | 2020-02-14 | オムロン株式会社 | 制御装置、タイムスタンプ修正方法およびプログラム |
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| AU2020480642A9 (en) | 2024-09-12 |
| AU2020480642A1 (en) | 2023-06-29 |
| EP4261801A1 (en) | 2023-10-18 |
| JPWO2022123651A1 (ja) | 2022-06-16 |
| EP4261801A4 (en) | 2024-09-11 |
| CN116648879B (zh) | 2024-12-27 |
| AU2020480642B2 (en) | 2024-05-23 |
| CN116648879A (zh) | 2023-08-25 |
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| JP7452707B2 (ja) | 2024-03-19 |
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