WO2025197495A1 - Work machine - Google Patents

Abstract

The work machine comprises a gateway device for communicating with a control device and a cutoff warning device. When executing an ending process for ending an operating state of the control device, the control device outputs, to the gateway device, a control end notice time, which is the advance-notice end time by the ending process. The gateway device calculates a gateway end notice time for ending the operation of the gateway device on the basis of the control end notice time received from the control device, and outputs the gateway end notice time to the cutoff warning device. The cutoff warning device issues a warning for urging prohibition of use of the cutoff switch, until the gateway end notice time received from the gateway device.

Description

Work machinery

The present invention relates to a work machine.

Work machines generally have a battery as a power supply. During maintenance work on the work machine, a ground fault or short circuit in the power line of this battery can occur, potentially damaging electronic devices such as the control device on the work machine itself (for example, the vehicle body). To prevent this, a cut-off switch is provided to electrically separate the electronic devices from the battery, and when performing certain work, the power supply is cut off beforehand by activating the cut-off switch.

On the other hand, if the cutoff switch is operated while the electronic device is running, the power supply to the electronic device will be cut off, and there is a risk of losing data being processed. To prevent this from happening, in addition to the cutoff switch, work machines are equipped with a cutoff warning device that warns against turning off the power.

Patent Document 1 states, "The battery cutoff device for construction machinery according to the present invention comprises a battery housed in a battery box, a cutoff switch connected to one polarity electrode of the battery for switching the connection of the battery, a display unit one end of which is connected to the battery, a controller for controlling predetermined functions of the vehicle on which the battery is mounted, a control unit for internally generating an operating signal that is turned on when the controller is operating, and a key switch connected to the other polarity electrode of the battery for switching the activation of the controller. The controller is characterized by comprising an internal power switch connected to the other polarity electrode of the battery for turning on and off the power supply from the battery to the controller, a self-holding circuit having a logical OR circuit that turns on the internal power switch when the logical OR of the on/off of the operating signal and the on/off of the key switch after the key switch is turned off is on, and a display switch that causes the display unit to display when the operating signal is on."

JP 2011-63234 A

According to the technology disclosed in Patent Document 1, the control device and the shutdown warning device are directly connected via a communication interface, and the control device notifies the shutdown warning device of its activation status.

However, directly connecting the control device and the shutdown warning device via a communication interface can be physically difficult due to constraints imposed by the type and number of communication interfaces on the control device and the shutdown warning device. This problem is particularly pronounced in recent work machines, where the number of different control devices is increasing due to increased functionality. Furthermore, it is necessary for the control device and the shutdown warning device to continue communicating and/or monitoring via the communication interface at least until the termination process for the control device's startup state is complete. This is particularly problematic when there are multiple control devices.

The present invention aims to appropriately issue a warning to prohibit the use of the power supply's cutoff switch without directly connecting the control device and the cutoff warning device via a communications interface.

A gateway device is provided that communicates with the control device and the shutdown warning device. When the control device executes a termination process to terminate the active state of the control device, it outputs a control termination warning time, which is the warning time for the termination process, to the gateway device. Based on the control termination warning time received from the control device, the gateway device calculates a gateway termination warning time for terminating the activation of the gateway device and outputs this to the shutdown warning device. The shutdown warning device issues a warning urging the user to refrain from using the shutdown switch until the gateway termination warning time received from the gateway device.

According to the present invention, it is possible to properly issue a warning to prohibit the use of the power supply's cutoff switch without directly connecting the control device and the cutoff warning device via a communications interface.

FIG. 1 is a system block diagram of a first embodiment. 1 is a work machine (shovel) according to a first embodiment. FIG. 10 is a diagram showing the configuration of a completion schedule management table according to the first embodiment. 4 is a flowchart of the gateway device according to the first embodiment. 3 is a flowchart of the interruption warning device according to the first embodiment. 1 is a time chart of the first embodiment (starting by a start switch). 10 is a part of a flowchart of the interruption warning device according to the second embodiment. 10 is a time chart of the second embodiment (automatic start by the control device 1).

In the following description, "memory" refers to one or more memory devices, typically a primary storage device. At least one memory device in the memory may be a volatile memory device or a non-volatile memory device.

Furthermore, in the following description, a "persistent storage device" refers to one or more persistent storage devices. A persistent storage device is typically a non-volatile storage device (e.g., an auxiliary storage device), and more specifically, is, for example, an HDD (Hard Disk Drive) or an SSD (Solid State Drive).

Furthermore, in the following description, "storage device" may refer to at least memory, including memory and persistent storage devices.

Furthermore, in the following description, a "processor" refers to one or more processor devices. The at least one processor device is typically a microprocessor device such as a CPU (Central Processing Unit), but may also be other types of processor devices such as a GPU (Graphics Processing Unit). The at least one processor device may be single-core or multi-core. The at least one processor device may also be a processor core. The at least one processor device may also be a processor device in a broader sense, such as a hardware circuit that performs some or all of the processing (for example, an FPGA (Field-Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit)).

Furthermore, in the following description, functions may be described using the expression "yyy unit," but the functions may be realized by one or more computer programs being executed by a processor, by one or more hardware circuits (e.g., FPGA or ASIC), or by a combination of these. When a function is realized by a program being executed by a processor, the specified processing is performed using a storage device and/or interface device, etc., as appropriate, and therefore the function may be considered to be at least a part of the processor. Processing described using a function as the subject may be processing performed by a processor or a device having that processor. A program may be installed from program source. The program source may be, for example, a program distribution computer or a computer-readable recording medium (e.g., a non-transitory recording medium). The description of each function is an example, and multiple functions may be combined into one function, or one function may be divided into multiple functions.

Furthermore, in the following explanation, expressions such as "xxx table" may be used to describe data that produces an output in response to an input, but this data may be data of any structure (for example, structured data or unstructured data), or it may be a neural network that generates an output in response to an input, or a learning model such as a genetic algorithm or random forest. Therefore, "xxx table" can also be called "xxx information." Furthermore, in the following explanation, the structure of each table is an example, and one table may be divided into two or more tables, or two or more tables may all or partly be one table.

Furthermore, in the following explanation, when describing elements of the same type without distinguishing between them, a common reference code (e.g., "130") will be used, and when describing elements of the same type with distinction between them, a reference code (e.g., "130-1" or "130-2") or element ID (e.g., "1") will be used. In the following explanation, reference codes will be three or more digits long.

Below, several examples are explained.

Figure 1 is a system block diagram of Example 1.

The work machine 100 includes a work machine main body 180, a start switch 101, a power supply unit 102, a cutoff switch 103, a cutoff warning device 110, multiple (or one) control devices 130, and a gateway device 120.

The work machine body 180 is the main part of the work machine 100. For example, if the work machine 100 is a shovel as shown in Figure 2, the work machine body 180 is the vehicle body. Note that a shovel is made up of an upper rotating body 202 including a cab 201 and a counterweight 207, a crawler-type lower traveling body 206, and a work implement including a boom 203, an arm 204, and a bucket 205. Hereinafter, in the explanation of the embodiments, the work machine 100 may be referred to as the "shovel 100."

The start switch 301 is a human interface that allows the operator to issue commands to start and stop the shovel. In other words, the start switch 301 is operated manually.

The power supply device 102 supplies power to the shutdown warning device 110, gateway device 120, and control device 130, and outputs a start switch activation command to activate the shutdown warning device 110, gateway device 120, and control device 130 in response to a command from the start switch 101. Furthermore, when the operator operates the start switch 101, the power supply device 102 stops outputting the start switch activation command. At this time, the control device 130 stops after executing predetermined termination processing, such as engine shutdown processing and saving processed data. Thus, in this embodiment, the output of the power supply device 102 includes power supply and start switch activation command output. The start switch activation command may be output from a device separate from the power supply device 102. Furthermore, the power supply device 102 may be a battery itself, or a device that includes a battery.

The cutoff switch 103 is a switch operated by the rider, service personnel, etc., and cuts off the power supply from the power supply unit 102 (and the start switch activation command output) to prevent electric shock and control device failure when disassembling or welding the work machine 100. When the cutoff switch 103 is operated, the power supply from the power supply unit 102 to each device mounted on the work machine 100 is cut off. Note that the person who operates the start switch 301 and cutoff switch 103 does not have to be the operator or service personnel described above. The cutoff switch 103 may also be a physical switch that mechanically cuts off the power supply circuit from the power supply unit 102 to each device, or it may send a command to the power supply unit 102 to cut off the power supply to each device.

In order to reduce the risk of excavator 100 failure or loss of processing data, when the control device 130 is activated, the shutoff warning device 110 issues a warning to service personnel via the warning output device 150 urging them to refrain from using the shutoff switch 103. For example, the warning output device 150 may be a warning light provided near the shutoff switch 103, and the warning urging them to refrain from using the shutoff switch may be the illumination of the warning light. Note that instead of or in addition to a warning light, the warning output device 150 may be a display device such as an LCD display, or an audio output device such as a buzzer. In the following examples, the warning output device 150 is assumed to be a warning light, and the "warning output device 150" may also be referred to as the "warning light 150."

The shutdown warning device 110 has a table storage area 113 in which the scheduled termination management table described below is stored, and an termination time management unit 112 and a warning control unit 111 described below.

The control device 130 controls the work machine main body 180 using power supplied from the power supply device 102. The control device 130 has a status management unit 131 that controls the device 130 in response to a start switch activation command, and an end notification unit 132, which will be described later.

The gateway device 120 communicates with the control device 130 and the shutdown warning device 110. The gateway device 120 has a status management unit 121 that controls the device 120 in response to a start switch activation command, a warning start command unit 124 that outputs a warning start command to the shutdown warning device 110 in response to the start switch activation command, and an end warning unit 122 and an end warning management unit 123, which will be described below.

Examples of the control device 130 include control device 130-1 (control device 1) and control device 130-2 (control device 2). The control device 130 and gateway device 120 are mounted on the excavator 100. Furthermore, control device 1, control device 2, and shutdown warning device 110 can only communicate directly with gateway device 120 due to communication interface restrictions. Each of devices 110, 120, and 130 may be equipped with a communication interface device, a storage device, and a processor connected to these, and functions such as the yyy unit may be realized by the processor. Furthermore, the table storage area 113 may be provided in the storage device of the shutdown warning device 110.

Figure 3 is a diagram of the scheduled termination management table 300.

The scheduled termination management table 300 shows the scheduled termination time for each termination process for each control device 130 and gateway device 120. Specifically, for example, the scheduled termination management table 300 has a record for each termination process, and the record has information such as a device ID 301, termination process content 302, and scheduled termination time 303.

Device ID 301 is identification information for the control device 130 or gateway device 120. Termination process content 302 is information indicating the content of the termination process (for example, the content of the termination process itself or information indicating the type of termination process). Estimated termination time 303 is information indicating the estimated completion time of the termination process (for example, the estimated time required for the termination process or the estimated completion time of the termination process). As illustrated in Figure 3, the estimated completion time differs depending on the device and the termination process content.

Figure 4 is a flowchart of the gateway device 120.

The status management unit 121 of the gateway device 120 determines whether the start switch activation command is to stop (step 401).

If the determination result in step 401 is true (step 401: Yes), the termination notice management unit 123 determines whether termination notices have been received from all control devices 130-1 and 130-2 (step 402).

If the determination result of step 402 is true (step 402: Yes), the status management unit 121 determines whether the termination process of the gateway device 120 can be completed within the scheduled completion time T5 of the termination process (see Figure 3) (step 403). This determination may be made based on, for example, the load status of the gateway device 120.

If the determination result of step 403 is true (step 403: Yes), the status management unit 121 instructs the termination notification unit 122 to issue a termination notification, and in response to that instruction, the termination notification unit 122 notifies the termination notification management unit 123 of the termination notification, and the termination notification management unit 123 notifies the shutdown warning device 110 of the termination notification (step 404).

Then, the termination notice management unit 123 executes the termination process (e.g., the remainder of the termination process) (step 405).

Next, we will explain the case where the operator starts or stops the shovel 100 using the start switch 101.

FIG. 5 is a flowchart of the shutdown warning device 110, and the time chart of FIG. 6 is an example of the execution results in Example 1. The flowchart of FIG. 5 starts simultaneously with the activation of the shutdown warning device 110 and is executed repeatedly at a predetermined interval. Below, Example 1 will be explained in accordance with this flowchart.

In step 501, the warning control unit 111 determines whether the warning light that warns against using the shutoff switch 103 is on. At time t600 in Figure 6, the start switch 101 is operated, and the power supply device 102 outputs a start switch activation command. This start switch activation command activates the shutoff warning device 110. At this time, the warning light 150 is not on (step 501: No). Therefore, processing proceeds to step 502.

In step 502, the warning control unit 111 determines whether or not to turn on the warning light 150. If a start switch activation command has been applied to the shutoff warning device 110 (step 502: Yes), in step 503, the warning control unit 111 turns on the warning light 150 (step 503). On the other hand, if it is not necessary to turn on the warning light 150 (step 502: No), this process ends.

In step 504, the termination time management unit 112 determines whether a new termination notice has been received from control device 1, control device 2, or gateway device 120. A "termination notice" is a notification (i.e., a notice of termination of the active state) indicating that the time required for the termination process to stop control device 1, control device 2, or gateway device 120 has fallen below a specified time (estimated termination process time). In addition, the "estimated termination process time" depends on the device performing the termination process and the content of the termination process that is running or scheduled to be running at the time the termination notice is notified.

In Example 1, at time t601 in Figure 6, the operator operates the start switch 101, and the start switch activation command is stopped (the operator turns off the start switch 101), which triggers control device 1 and control device 2 to start termination processing. At this time, termination notification unit 132-1 and termination notification unit 132-2 monitor the execution status of the termination processing from status management units 131-1 and 131-2, respectively, and when the termination processing reaches a predetermined execution stage, they notify the termination notification management unit 123 of gateway device 120 of a termination notification (hereinafter referred to as control termination notification) containing the remaining termination processing content and identification information of control device 1 or 2. Note that after notifying the control termination notification, control device 1 and control device 2 terminate as soon as all termination processing is completed. Times t602 and t603 in Figure 6 are the termination times of control device 1 and control device 2, respectively. The estimated end time shown in Figure 3 is an estimate (for example, the estimated end time considered to be the longest or latest), and it is possible that the termination process will end before the estimated end time has elapsed after the termination notice is output.

In addition, the termination notification unit 122 of the gateway device 120 determines that the termination notification management unit 123 has received control termination notifications from control device 1 and control device 2, and obtains the termination processing status from the status management unit 121. When the gateway device 120 can terminate within the specified termination time, the termination notification unit 122 notifies the termination notification management unit 123 of a termination notification (hereinafter referred to as a gateway termination notification) containing the remaining termination processing content and the identification information of the gateway device 120. After notifying the gateway termination notification, the gateway device 120 terminates as soon as it completes the termination processing. t604 in Figure 6 is the termination time of the gateway device 120 in Example 1. Note that in this example, the gateway device 120 notifies the interruption warning device 110 of the received control termination notification each time it receives a control termination notification from control device 1 and control device 2, but the gateway termination notification of the termination notification management unit 123 may include the control termination notifications of control device 1 and control device 2, and the notification of the gateway termination notification may also serve as the notification of the control termination notification of control device 1 and control device 2.

In step 505, upon receiving a termination notice (control termination notice or gateway termination notice), the termination time management unit 112 begins counting the time that has elapsed since receiving the termination notice (termination processing elapsed time) for each device that output the termination notice.

In step 506, the termination time management unit 112 counts up the termination processing elapsed time that has already started counting.

In step 507, the end time management unit 112 determines whether end notices have been received from all control devices 130 and gateway devices 120. If all end notices have not been received (step 507: No), the warning light 150 will not be turned off, and processing ends.

In step 508, the termination time management unit 112 determines whether the elapsed termination processing times for all control devices 130 and gateway devices 120 have exceeded the corresponding scheduled termination times. Here, the "corresponding scheduled termination times" refer to the scheduled termination times (the estimated time required to complete the termination processing content) identified from the termination schedule management table 300 in correspondence with the identification information and termination processing content identified from the termination notice. If all termination processing elapsed times have exceeded the corresponding scheduled termination times (step 508: Yes), it is estimated that control devices 1 and 2 and gateway device 120 have already been terminated, and processing proceeds to step 509, where the warning control unit 111 stops (turns off) the warning light 150. t605 in Figure 6 is the time at which the warning light 150 is stopped.

If the gateway device 120 directly monitors whether the control devices 1 and 2 are running, the gateway device 120 must stay running (maintain a running state) until time 603 in Figure 6 and instruct the shutdown warning device 110 to keep the warning light 150 lit. However, by using the processing in Example 1, the gateway device 120 can be shut down once the scheduled shutdown times of all the control devices 130 have been estimated, thereby reducing the power consumption of the gateway device 120.

Example 2 will now be described. Differences from Example 1 will be mainly explained, and explanations of points in common with Example 1 will be omitted or simplified.

Figure 7 is a part of a flowchart of the interruption warning device 110 of Example 2.

The difference from Example 1 is that the state management units 131 of the control devices 1 and 2 and the state management unit 121 of the gateway device 120 not only start or terminate in response to a start switch activation command (or instead), but also start under specified conditions without a start switch activation command. A "specified condition" refers to the detection of a specified event other than the operation of the start switch 101, such as the opening or closing of the door of the shovel 100, the arrival of a specified time, or the receipt of an automatic activation command via a communication interface. When a control device 130 detects the opening or closing of the door of the shovel 100, it can turn on the interior light of the shovel 100 to assist the operator in boarding. Furthermore, at the end of the day, the control device 1 may upload information such as the vehicle's location and operating hours to an external server. In this case, the state management unit 131-1 activates the control device 1 triggered by the arrival of a specified time, rather than a start switch activation command. Additionally, using technology such as Wake-on-Lan, the control device 1 may send an automatic activation command via a communication interface to activate another control device 2. In Example 2, the control device 1 is assumed to start up at a predetermined time and upload vehicle body information to an external server. At this time, the information to be transmitted is also stored in the control device 2, so the gateway device 120 and the control device 2 are assumed to be started up by an automatic start command. The control device 2 then notifies the control device 1 of the predetermined information via the gateway device, and then terminates. The control device 1 also uploads the vehicle body information, including the information obtained from the control device 2, to the external server, and terminates after the upload is complete.

In step 702, the warning is initiated not only by a start switch activation command but also by a warning start command, which differs from embodiment 1.

The warning start command is a command to start a warning when the control device 130 or gateway device 120 is started up without a start switch activation command.

In the example of Figure 8, it is assumed that the control device 1 detects the arrival of a predetermined time and starts up at time t800 in order to upload vehicle body information to the off-vehicle server. At this time, the control device 1 sends an automatic start command to the status management unit 121 of the gateway device 120 in order to collect vehicle body information to send to the off-vehicle server, and the gateway device 120 starts up at time t804 in Figure 8. The gateway device 120 then starts up the control device 2 at time t802 in Figure 8, triggered by the start of the automatic start command. At this time, the gateway device 120 commands the shutdown warning device 110 to start a warning via the warning start command unit 124 in order to prevent the upload to the off-vehicle server from being interrupted by operation of the shutdown switch 603.

Furthermore, in this embodiment, after notifying control device 1 of the specified vehicle body information, control device 2 outputs a termination notice to gateway device 120, and then terminates at time t803 in Figure 8. In addition, when control device 1's termination notice unit 132-1 determines that the time until control device 1 completes uploading the vehicle body information is equal to or less than T2 shown in Figure 3, it outputs a termination notice to gateway device 120. In Example 2, after control device 1 outputs the termination notice, it terminates at time t801 in Figure 8. Then, after control devices 1 and 2 output termination notices, gateway device 120 notifies a gateway termination notice and terminates as soon as the specified termination processing is completed. In Example 2, it is assumed that gateway device 120 terminates at time t805 in Figure 8.

As described above, even if the control device 130 starts up without operating the start switch 101, a warning is output urging the user to prohibit use of the shut-off switch 103. Compared to when the startup status of control devices 1 and 2 is monitored to control whether or not to issue a warning, the startup time of the gateway device 120 can be shortened, thereby reducing the power consumption of the gateway device 120.

The shutdown warning device 110 does not directly monitor the startup state of the control device 130, but rather estimates the timing of the shutdown of the control device 130 based on the control device 130 that outputs the shutdown notice and the details of the shutdown process of the control device 130. As a result, there is a possibility that the warning will continue longer than the control device 130 actually shuts down. In this case, power consumption due to the startup state of the shutdown warning device 110 is wasted, but since the power consumption of the gateway device 120, which is a higher performance electronic device, is greater, shortening the startup time of the gateway device 120 has a greater effect in terms of reducing power consumption.

Although several embodiments have been described above, these are merely examples for the purpose of explaining the present invention and are not intended to limit the scope of the present invention to these embodiments. The present invention can also be implemented in a variety of other forms. For example, instead of or in addition to a shovel, the present invention can be applied to various work machines (for example, construction work machines such as construction vehicles, or other work machines).

For example, the above explanation can be summarized as follows. The summary below may include supplementary explanations and explanations of variations of the above explanation.

The work machine 100 comprises a work machine main body 180, a power supply unit 102, a shutoff switch 103 that shuts off the output of the power supply unit 102, a control device 130 that controls the work machine main body 180, a gateway device 120 that communicates with the control device 130, and a shutoff warning device 110 that communicates with the gateway device 120. The devices 110, 120, and 130 receive power from the power supply unit 102. When the control device 130 executes a termination process to terminate the startup of the control device 130, it outputs a control termination notice time, which is the notice time for the termination process, to the gateway device 120. The gateway device 120 calculates a gateway termination notice time for terminating the startup of the gateway device 120 based on the control termination notice time received from the control device 130, and outputs this to the shutoff warning device 110. The shutoff warning device 110 issues a warning urging the use of the shutoff switch 103 to be prohibited until the gateway termination notice time received from the gateway device 120.

A gateway device 120 is interposed between the control device 130 and the shutdown warning device 110, and the control device 130 and the shutdown warning device 110 each communicate with the gateway device 120. This eliminates the need to directly connect the control device 130 and the shutdown warning device 110 via a communication interface, avoiding issues with the type and number of communication interfaces provided to the control device 130 and the shutdown warning device 110, and also eliminates the need for the control device 130 and the shutdown warning device 110 to continue communicating via a communication interface at least until the termination process for the startup state of the control device 130 is complete.

Furthermore, when monitoring the startup status of the control devices 130 via the gateway device 120, in one comparative example, the gateway device 120 must continue running until all of the control devices 130 have terminated, resulting in a large amount of power consumption by the gateway device 120. However, in this embodiment, the control devices 130 and gateway device 120 each output a termination notice, the shutdown warning device 110 maintains the warning until it estimates that the termination process for which it has been notified has been completed, and after outputting the gateway termination notice, the gateway device 120 terminates without waiting for the control devices 130 to terminate. This reduces the power consumption of the gateway device 120.

For example, the control device 130 may output a control termination notice, which is a notice of termination of the startup state of the control device 130, and perform termination processing to terminate the startup state of the control device 130. When the gateway device 120 receives a control termination notice from the control device 130, it may output a gateway termination notice, which is a notice of termination of the startup state, and perform termination processing to terminate the startup state of the gateway device. When the shutdown warning device 110 receives a startup command, it may issue a warning urging prohibition of use of the shutdown switch 103, and may stop the warning when it receives a gateway termination notice and presumes that the notified termination processing has been completed.

Multiple control devices 130 may be connected to the gateway device 120. Having multiple control devices 130 has the advantage over having only one, as it eliminates the need to directly connect the control device 130 and the shutdown warning device 110 via a communication interface and reduces the power consumption of the gateway device 120.

For example, multiple control devices 130 may be provided depending on the functions of the work machine main body 180, and the gateway device 120 may calculate the gateway end warning time as the longest of the control end warning times of each of the multiple control devices 130 and the time required for that gateway device 120 to finish starting up. The "control end warning time" may be, for example, the time represented by the scheduled end time 303 for the control device 130, and the "time required for the gateway device 120 to finish starting up" may be, for example, the time represented by the scheduled end time 303 for the gateway device 120.

When the shutdown process of the control device 130 or gateway device 120 is completed (when the startup state is terminated), the control device 130 or gateway device 120 may be turned off (for example, into a state of low or no power consumption, such as sleep mode or shutdown).

"When it is estimated that the termination process whose termination was announced has ended" may mean when the gateway termination announcement time has elapsed. Typically, from the perspective of terminating the gateway device 120 before at least one control device 130, the time required to terminate the startup of the gateway device 120 is shorter than the control termination announcement time of at least one control device 130.

Each time the gateway device 120 receives a control end notice (e.g., a notice associated with a control end notice time) from the control device 130, it may forward the control end notice to the shutdown warning device 110. When the shutdown warning device 110 receives a control end notice, it may start timing the control device 130 and estimate whether the measured time has passed the control end notice time.

Furthermore, the gateway device 120 may include control termination notices for all control devices 130 in the gateway termination notice (for example, a notice associated with the "time required for the gateway device 120 to finish startup" or the "gateway termination notice time") and send it. Based on the gateway termination notice, the interruption warning device 110 may monitor whether the gateway termination notice time has elapsed (estimate whether the termination processing for all control devices 130 and gateway devices 120 has finished).

The gateway device 120 may output to the interruption warning device 110 the identification information of the control device 130 that output the control end notice, and the identification information of the gateway device 120. The identification information of the control device 130 may be included in the control end notice, and the identification information of the gateway device 120 may be included in the gateway end notice. The interruption warning device 130 may store, for each of the control device 130 and gateway device 120, the identification information of that device and termination schedule management information indicating the scheduled termination time. The interruption warning device 130 may identify, for each of all control devices 130 and gateway devices 120, the control end notice time corresponding to the device's identification information from the termination schedule management information. This makes it possible to reduce the power consumption of the gateway device 120 and maintain appropriate warnings, even if the control end notice time differs depending on the device. Note that the termination schedule management information may be stored in the gateway device 120 instead of or in addition to the interruption warning device 110.

The control termination notice time of the control device 130 may be a time according to the content of the termination process of the control device 130. Furthermore, the time required for the gateway device 120 to terminate startup may be a time according to the content of the termination process of the gateway device 120.

Specifically, for example, the control termination notice from the control device 130 may be associated with termination process content information, which is information indicating the content of the termination process. The gateway device may output the process termination content information associated with the received control termination notice to the interruption warning device 110. The termination schedule management information may include a set of information indicating the termination process content and information indicating the control termination notice time for the control device 130 (and gateway device 120). The scheduled termination time identified for each control device 130 (and gateway device 120) may include the scheduled termination time corresponding to the termination process content information from the gateway device 120. This makes it possible to reduce the power consumption of the gateway device 120 and maintain appropriate warnings, even if the scheduled termination time differs depending on the device and the termination process content.

The control termination notice may be associated with scheduled termination time information, which is information indicating the scheduled termination time of the termination process. That is, the control device 130 may be configured to associate information indicating the scheduled termination time of the control device 130 with the control termination notice and output it. In this case, scheduled termination management information may not be necessary. The gateway device 120 may output scheduled termination time information associated with the control termination notice to the interruption warning device 110, and may output scheduled termination time information indicating the scheduled termination time of the gateway device 120's termination process in association with the gateway termination notice. The termination process whose termination is scheduled to be completed may be estimated to have completed when the latest or longest scheduled termination time indicated by the scheduled termination time information of all control devices 130 and gateway devices 120 has elapsed. As a result, even if the scheduled termination time varies depending on the device and the content of the termination process, it is possible to reduce the power consumption of the gateway device 120 and maintain appropriate warnings based on the scheduled termination time information output from the control device 130 and gateway device 120.

The start command that triggers the start of the warning may be a command that is output when the manually operated start switch 101 is operated, or a command that is output when a specified event other than the operation of the start switch 101 is detected. This allows the warning to be started at the appropriate time.

102 Power supply device 103 Shut-off switch 110 Shut-off warning device 120 Gateway device 130 Control device

Claims (7)

A work machine body;
a power supply device for supplying power;
a cutoff switch that cuts off the power supply from the power supply device,
a control device that receives power from the power supply device and controls the work machine body;
a gateway device that receives power from the power supply device and communicates with the control device;
a shutdown warning device that receives power from the power supply device and communicates with the gateway device;
Equipped with
The control device
When executing a termination process for terminating the activation of the control device, a control termination notice time, which is a notice time for the termination process, is output to the gateway device;
The gateway device
calculates a gateway termination notice time for terminating activation of the gateway device based on the control termination notice time received from the control device, and outputs the calculated time to the shutdown warning device;
The interruption warning device is
a warning that urges the user to prohibit use of the cutoff switch until the gateway termination notice time received from the gateway device is issued; a plurality of the control devices are provided according to the functions of the work machine main body,
2. The work machine according to claim 1, wherein the gateway device calculates, as the gateway end notice time, the longest of the control end notice times of each of the plurality of control devices and the time required for the gateway device to finish startup. the gateway device outputs, to the interruption warning device, identification information of the control device that output the control termination notice and identification information of the gateway device;
the shutdown warning device stores identification information and scheduled termination management information indicating scheduled termination times for each of the control device and the gateway device;
The work machine according to claim 2 , wherein the shutdown warning device identifies the control end notice time corresponding to identification information for each of the control device and the gateway device that output the control end notice from the end schedule management information. The work machine according to claim 2, wherein the control termination notice time of the control device is a time period corresponding to the content of the termination process of the control device. 3. The work machine according to claim 2, wherein the time required for the gateway device to complete startup is a time corresponding to the content of the processing required for the gateway device to complete. The start command is a command that is output when a manually operated start switch is operated, or a command that is output when a predetermined event other than the operation of the start switch is detected.
2. The work machine according to claim 1. A plurality of the control devices are connected to the gateway device.
A work machine according to any one of claims 1 to 6.