Display control system of work machine

Abstract

To provide a display control system that correctly displays remaining operating time information.SOLUTION: A calculation unit calculates remaining operating time information of a work machine based on a remaining battery charge and a behavior of the work machine within a specified period. An output unit outputs a signal to indicate the remaining operating time information.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present disclosure relates to a display control system for a work machine. [Background technology]

[0002] Electrically driven work machines that are zero-emission and low-noise are often used for construction work in urban areas and the like. Electrically driven work machines do not have an engine or a fuel tank, but instead have an electric motor that drives a hydraulic pump and the like, and an electricity storage device such as a battery that supplies power to the electric motor. Such electrically driven work machines take longer to charge than engine-driven work machines. For this reason, it is important for operators to be aware of the remaining operating time of the electrically driven work machine. Patent Document 1 discloses a display device that is mounted on a work machine powered by an electric motor and displays the remaining battery charge and remaining operating time of the work vehicle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2007-288894 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, the power consumption of a work machine differs depending on the behavior of the work machine. Therefore, the remaining operating time calculated from the remaining battery charge and the power consumption per predetermined unit time may deviate from the actual remaining operating time. An object of the present disclosure is to provide a display control system for a work machine that can appropriately present information relating to remaining operating time. [Means for solving the problem]

[0005] According to one aspect of the present disclosure, a display control system for a work machine is a display control system for a battery-powered work machine, and includes a calculation unit that calculates information relating to a remaining operating time of the work machine based on a remaining charge of the battery and a behavior of the work machine within a predetermined period of time, and an output unit that outputs a signal for displaying the information relating to the remaining operating time. Effect of the Invention

[0006] According to the above aspect, the display control system can appropriately present information regarding the remaining operating time. [Brief description of the drawings]

[0007] [Figure 1] 1 is a schematic diagram showing a configuration of a display control system according to a first embodiment. [Diagram 2] 1 is a diagram showing a configuration of a work machine according to a first embodiment. [Diagram 3] FIG. 2 is a diagram showing the internal configuration of a driver's cab according to the first embodiment. [Figure 4] 1 is a schematic block diagram showing the configuration of a work analysis device according to a first embodiment. [Diagram 5] 4 is a flowchart showing a screen presentation method performed by the work analysis device according to the first embodiment. [Figure 6] FIG. 2 is a diagram showing an example of a display screen according to the first embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] First Embodiment Overall composition FIG. 1 is a schematic diagram showing the configuration of a display control system 1 according to a first embodiment. The display control system 1 includes a work machine 100 and a work analysis device 300. The work analysis device 300 analyzes work of the work machine 100 and generates a screen that displays information related to the work history and remaining operating time of the work machine. In the first embodiment, the information related to the remaining operating time includes the remaining operating time and the end timing of the operable period. A user can recognize the remaining operating time of the work machine 100 by visually checking the screen output by the work analysis device 300.

[0009] The work machine 100 is the subject of work analysis by the work analysis device 300. Examples of the work machine 100 include other work machines such as a hydraulic excavator and a wheel loader. In the first embodiment, an electrically driven hydraulic excavator will be described as an example of the work machine 100. The work machine 100 is provided with a plurality of sensors, and information related to the measurement values ​​of each sensor is transmitted to the work analysis device 300.

[0010] "Work Machine 100" FIG. 2 is a diagram showing the configuration of a work machine 100 according to the first embodiment. The work machine 100 operates at a construction site, excavates a construction object such as soil and sand, and loads it onto a loading platform such as a vessel of a loading object T such as a dump truck. Examples of the work machine 100 include a face shovel, a backhoe shovel, and a rope shovel. The work machine 100 may be electrically driven or hydraulically driven. The work machine 100 according to the first embodiment is a backhoe shovel. The work machine 100 includes a traveling body 110, a rotating body 120, a working machine 130, and a cab 140. Examples of the loading object T include a dump truck and a hopper.

[0011] The running body 110 supports the work machine 100 so that it can run. The running body 110 includes two endless tracks 111 provided on the left and right, and two travel motors 112 for driving each of the endless tracks 111. The running body 110 is an example of a support portion. The rotating body 120 is supported by the running body 110 so as to be capable of rotating about a rotation center. The work machine 130 is hydraulically driven and supported on the front part of the revolving body 120 so as to be drivable in the vertical direction. The operator's cab 140 is a space where an operator rides in and operates the work machine 100. The operator's cab 140 is provided at the left front part of the rotating body 120. Here, the part of the rotating body 120 to which the work machine 130 is attached is referred to as the front part. Furthermore, with respect to the rotating body 120, the part opposite the front part is referred to as the rear part, the left part as the left part, and the right part as the right part.

[0012] Configuration of the rotating body 120 The rotating body 120 includes a battery 121, a hydraulic pump 122, a control valve 123, and a rotating motor . The battery 121 is a power source that drives the hydraulic pump 122 . The hydraulic pump 122 is an electric pump that is driven by power supplied from the battery 121. The hydraulic pump 122 supplies hydraulic oil via a control valve 123 to each actuator (the boom cylinder 131C, the arm cylinder 132C, the bucket cylinder 133C, the travel motor 112, and the swing motor 124). The control valve 123 controls the flow rate of the hydraulic oil supplied from the hydraulic pump 122 . The swing motor 124 is driven by hydraulic oil supplied from a hydraulic pump 122 via a control valve 123 to swing the swing body 120 .

[0013] Configuration of the work machine 130 The work machine 130 includes a boom 131, an arm 132, a bucket 133 as a work tool, a boom cylinder 131C, an arm cylinder 132C, and a bucket cylinder 133C. Other examples of the work tool include end attachments such as a clam bucket, a tilt bucket, a tilt rotate bucket, a grapple, and a lifting magnet.

[0014] The base end of the boom 131 is rotatably attached to the revolving body 120 via a boom pin. In the work machine 100 shown in FIG. 1, the boom 131 is provided at the center of the front of the revolving body 120, but the present invention is not limited to this and the boom 131 may be attached offset in the left-right direction. In this case, the center of rotation of the revolving body 120 is not located on the operating plane of the work implement 130. The arm 132 connects the boom 131 and the bucket 133. A base end of the arm 132 is rotatably attached to a tip end of the boom 131 via an arm pin. The bucket 133 is rotatably attached via a pin to the tip of the arm 132. Members that support the bucket 133 include a boom 131 and an arm 132. The bucket 133 functions as a container for storing excavated soil and sand.

[0015] The boom cylinder 131C is a hydraulic cylinder for operating the boom 131. A base end of the boom cylinder 131C is attached to the rotating body 120. A tip end of the boom cylinder 131C is attached to the boom 131. The arm cylinder 132C is a hydraulic cylinder for driving the arm 132. A base end of the arm cylinder 132C is attached to the boom 131. A tip end of the arm cylinder 132C is attached to the arm 132. The bucket cylinder 133C is a hydraulic cylinder for driving the bucket 133. A base end of the bucket cylinder 133C is attached to the arm 132. A tip end of the bucket cylinder 133C is attached to a link mechanism that rotates the bucket 133.

[0016] Configuration of the cab 140 FIG. 3 is a diagram showing the internal configuration of the operator's cab 140 according to the first embodiment. A driver's seat 141, an operation terminal 142, an operation device 143, and a control device 160 are provided in the driver's cab 140. The operation terminal 142 is provided near the driver's seat 141. The operation terminal 142 may be a display device constituted by, for example, a touch panel. The operation terminal 142 may also be equipped with a display device such as an LCD.

[0017] The operation device 143 is a device for driving the traveling body 110, the rotating body 120, and the work machine 130 by manual operation by an operator. The operation device 143 includes a left operation lever 143LO, a right operation lever 143RO, a left foot pedal 143LF, a right foot pedal 143RF, a left traveling lever 143LT, a right traveling lever 143RT, and a swing brake pedal 143TB.

[0018] The left operating lever 143LO is provided on the left side of the driver's seat 141. The right operating lever 143RO is provided on the right side of the driver's seat 141.

[0019] The left operation lever 143LO is an operation mechanism for performing the rotation operation of the revolving body 120 and the excavation / dumping operation of the arm 132. Specifically, when the operator of the work machine 100 tilts the left operation lever 143LO forward, the arm 132 performs the dumping operation. When the operator of the work machine 100 tilts the left operation lever 143LO rearward, the arm 132 performs the excavation operation. When the operator of the work machine 100 tilts the left operation lever 143LO to the right, the revolving body 120 rotates to the right. When the operator of the work machine 100 tilts the left operation lever 143LO to the left, the revolving body 120 rotates to the left. Note that in other embodiments, when the left operation lever 143LO is tilted in the front-rear direction, the revolving body 120 rotates to the right or left, and when the left operation lever 143LO is tilted in the left-right direction, the arm 132 performs the excavation operation or the dumping operation.

[0020] The right operation lever 143RO is an operation mechanism for performing an excavation / dump operation of the bucket 133 and a raising / lowering operation of the boom 131. Specifically, when the operator of the work machine 100 tilts the right operation lever 143RO forward, a lowering operation of the boom 131 is performed. When the operator of the work machine 100 tilts the right operation lever 143RO rearward, a raising operation of the boom 131 is performed. When the operator of the work machine 100 tilts the right operation lever 143RO to the right, a dump operation of the bucket 133 is performed. When the operator of the work machine 100 tilts the right operation lever 143RO to the left, an excavation operation of the bucket 133 is performed. Note that in other embodiments, when the right operation lever 143RO is tilted in the front-rear direction, the bucket 133 may perform a dump operation or an excavation operation, and when the right operation lever 143RO is tilted in the left-right direction, the boom 131 may perform a raising operation or a lowering operation.

[0021] The left foot pedal 143LF is disposed on the left side of the floor surface in front of the driver's seat 141. The right foot pedal 143RF is disposed on the right side of the floor surface in front of the driver's seat 141. The left travel lever 143LT is pivoted to the left foot pedal 143LF, and is configured so that the tilt of the left travel lever 143LT and the depression of the left foot pedal 143LF are linked. The right travel lever 143RT is pivoted to the right foot pedal 143RF, and is configured so that the tilt of the right travel lever 143RT and the depression of the right foot pedal 143RF are linked.

[0022] The left foot pedal 143LF and the left traveling lever 143LT correspond to the rotational drive of the left crawler belt of the traveling body 110. Specifically, when the operator of the work machine 100 pushes the left foot pedal 143LF or the left traveling lever 143LT forward, the left crawler belt rotates in the forward direction. Conversely, when the operator of the work machine 100 pushes the left foot pedal 143LF or the left traveling lever 143LT backward, the left crawler belt rotates in the reverse direction.

[0023] The right foot pedal 143RF and the right traveling lever 143RT correspond to the rotational drive of the right crawler belt of the traveling body 110. Specifically, when the operator of the work machine 100 pushes the right foot pedal 143RF or the right traveling lever 143RT forward, the right crawler belt rotates in the forward direction. Conversely, when the operator of the work machine 100 pushes the right foot pedal 143RF or the right traveling lever 143RT backward, the right crawler belt rotates in the reverse direction.

[0024] The control device 160 collects measurement data collected from multiple sensors equipped in the work machine 100 and the operation amount of the operation device 143, and stores the data in association with a timestamp. The control device 160 also transmits the time series of the measurement data and the operation amount to the work analysis device 300. The control device 160 is a computer equipped with a processor, main memory, storage, and interface (not shown). The storage of the control device 160 stores a data aggregation program. The processor of the control device 160 reads out the data aggregation program from the storage and expands it in the main memory, and executes the collection process of the measurement data and the operation amount and the transmission process in accordance with the data aggregation program. The control device 160 may be provided inside or outside the work machine 100.

[0025] The work machine 100 is equipped with a plurality of sensors. Each sensor outputs a measurement value to the control device 160. The work machine 100 is equipped with at least a power meter that measures the power consumption of the battery 121, and a fuel gauge that measures the remaining charge of the battery 121. The work machine 100 may be equipped with sensors such as a cylinder stroke sensor for identifying the attitude of the work implement 130, a pressure sensor for identifying the weight of the work implement 130, and an IMU that measures the rotation angle of the rotating body 120.

[0026] <<Configuration of the Work Analysis Device>> FIG. 4 is a schematic block diagram showing the configuration of the work analysis device according to the first embodiment. The work analysis device 300 is a computer including a processor 31, a main memory 33, a storage 35, and an interface 37. The storage 35 stores a work analysis program. The processor 31 reads out the work analysis program from the storage 35, deploys it in the main memory 33, and executes processing in accordance with the work analysis program. Note that while the work analysis device 300 according to the first embodiment is provided outside the work machine 100, in other embodiments, some or all of the functions of the work analysis device 300 may be provided inside the work machine 100.

[0027] Examples of the storage 35 include semiconductor memory, disk media, and tape media. The storage 35 may be an internal medium directly connected to a common communication line of the work analysis apparatus 300, or may be an external medium connected to the work analysis apparatus 300 via an interface 37. The storage 35 is a non-transitory tangible storage medium.

[0028] The processor 31 is provided with a data acquisition unit 311, an input unit 312, an authentication unit 313, an estimation unit 314, a power calculation unit 315, a time calculation unit 316, an output unit 317, and a warning unit 318 by executing the work analysis program. The work analysis program stored in the storage 35 includes a prediction model 351. The prediction model is a trained model trained to input a time series of measurement data and an operation amount and output a time series of work classifications. The prediction model 351 is trained by using a combination of a time series of measurement data and an operation amount and a time series of labels of work classifications of the work machine 100 at the time the measurement data was collected as a learning data set. The prediction model may be, for example, a neural network model. In addition, the storage 35 has a storage area reserved for a status table 352 that stores status data for each work machine 100, and an account table 353 that stores user account data.

[0029] The status table 352 stores a work machine ID, time, type of status data, and value of status data in association with each other. The account table 353 stores a user ID, a password, one or more work machine IDs for which viewing of status data is permitted, a target period for analysis, and a threshold value for remaining operation time in association with each other. The threshold value for remaining operation time is used to warn the user of the remaining capacity of the battery 121.

[0030] The work analysis apparatus 300 according to the first embodiment functions as a web server. That is, the work analysis apparatus 300 accepts a request message (HTTP request) from a display device operated by a user, executes a predetermined process, and outputs a response message for screen display.

[0031] The data acquisition unit 311 acquires a time series of status data indicating the status of the work machine 100 from the control device 160 of the work machine 100. In other words, the data acquisition unit 311 acquires a plurality of combinations of timestamps and status data. The status data may include measurement values ​​of each sensor of the work machine 100 and values ​​determined by the control device 160 based on the measurement values. The data acquisition unit 311 stores the acquired time series of status data in a status table 352 of the storage 35 in association with the ID of the work machine 100.

[0032] The input unit 312 receives a request message from a user. The request message may include values ​​of request parameters.

[0033] The authentication unit 313 performs a process of authenticating a user. For example, the authentication unit 313 performs the authentication process by checking the user ID and password indicated by the request parameters added to the request message against the data in the account table 353.

[0034] The estimation unit 314 obtains a time series of task divisions based on the time series of new status data obtained by the data obtaining unit 311 and the prediction model 351 stored in the storage 35. For example, the estimation unit 314 obtains a time series of likelihoods related to task divisions in the following procedure. The estimation unit 314 obtains status data at the time when the task is specified from the time series of status data. Next, the estimation unit 314 obtains a time series of each task division based on the obtained status data.

[0035] The estimation unit 314 identifies, as task divisions, unit task divisions and element task divisions. A unit task is a task that accomplishes one task purpose. An element task is an element that constitutes a unit task, and is a series of actions or tasks that are classified according to purpose.

[0036] Examples of classifications of elemental work include "digging," "turning loaded," "discharging soil," "turning empty," "waiting for soil to be discharged," "holding the loading platform," "compaction," "leveling," and "broom." Excavation is the process of digging and scraping away soil or rocks using a bucket 133. Load rotation is a task of rotating the rotating body 120 while the bucket 133 is loaded with the scraped soil or rocks. Soil removal is the process of lowering the excavated soil or rocks from the bucket 133 onto a transport vehicle or onto a designated location. Empty rotation is a task of rotating the rotating body 120 with no soil or rocks in the bucket 133. Waiting for soil discharge is a task in which the excavated soil or rocks are loaded into the bucket 133 and awaited by a transport vehicle to load it. The loading platform pressing is a task of pressing down the soil loaded on the loading platform of a transport vehicle from above with a bucket 133 to flatten it. Compaction is the process of pushing soil and sand into disturbed ground with a bucket 133 to shape and strengthen the ground. Pushing and leveling is the process of leveling the soil with the bottom of the bucket 133. The broom job involves sweeping and leveling the dirt with the side of the bucket 133.

[0037] Examples of unit work divisions include "loading a dump truck," "collecting cargo," "driving," and "parking." Dump loading is the work of digging, scraping, and loading the scraped soil or rocks onto the bed of a transport vehicle such as a dump truck. Dump loading is a unit work consisting of excavation, turning the loaded load, unloading the soil, turning the empty load, waiting for the soil to be unloaded, and holding down the bed. Load collection is the task of collecting soil and sand produced by excavation etc. before loading it onto a transport vehicle. Load collection is a unit task that consists of excavation, loading rotation, soil removal, and empty loading rotation, and may include pushing and leveling. Traveling is a task of moving the work machine 100. Traveling as a unit task is a unit task made up of traveling as element tasks. The "stopped" state is a state in which there is no earth or rocks in the bucket 133 and the vehicle has been stopped for a predetermined period of time or longer. The "stopped" state as a unit task is a unit task constituted by "stopped" element tasks.

[0038] The power calculation unit 315 calculates the average power consumption and the power consumption per unit time for each unit task division based on the time series of the measurement data of the power sensor acquired by the data acquisition unit 311 and the time series of the unit task divisions estimated by the estimation unit 314. Specifically, the power calculation unit 315 divides the time series of the measurement data of the power sensor into each unit task division, and divides the sum of the power consumption represented by the measurement data for each division by the time related to that division, thereby obtaining the power consumption per unit time for each division. The power calculation unit 315 calculates the charging power per unit time based on the time series of the measurement data of the power sensor acquired by the data acquisition unit 311 and the time series of the division of the unit task estimated by the estimation unit 314. Specifically, the power calculation unit 315 obtains the charging power per unit time by dividing the sum of the charging power represented by the measurement data when the battery 121 is being charged, among the measurement data of the power sensor, by the charging time.

[0039] The time calculation unit 316 calculates the remaining operating time by dividing the remaining capacity of the battery 121 acquired by the data acquisition unit 311 by the power consumption per unit time calculated by the power calculation unit 315. The time calculation unit 316 calculates the remaining charging time by dividing the difference between the maximum capacity of the battery 121 and the remaining capacity of the battery 121 acquired by the data acquisition unit 311 by the charging power per unit time calculated by the power calculation unit 315.

[0040] The output unit 317 outputs a response message for displaying a display screen showing the remaining operating time calculated by the time calculation unit 316. A warning unit 318 displays warning information on the display screen when the remaining operating time calculated by the time calculation unit 316 falls below the designated time.

[0041] <<Operation of display control system 1>> The control device 160 of the work machine 100 transmits the measurement data of the sensors and time-series data of the operation amount of the operation device 143 at regular time intervals to the work analysis device 300. The data acquisition unit 311 of the work analysis device 300 records the received time-series data in the storage 35 in association with the ID of the work machine 100.

[0042] Users such as the operator of the work machine 100, the owner of the work machine, and the person in charge of the construction site access the work analysis device 300 using a display device such as a PC or smartphone to know the status of the work machine 100. For example, the user accesses the work analysis device 300 via a web browser on the display device. The display device may be the operation terminal 142 of the work machine 100.

[0043] Fig. 5 is a flowchart showing a screen presentation method by the work analysis device 300 according to the first embodiment. Note that the flowchart shown in Fig. 5 is merely an example, and the order or content of some of the processes may be different in other embodiments. When the input unit 312 of the work analysis device 300 receives a request message from the display device (step S1), the authentication unit 313 determines whether or not the user has been authenticated (step S2). If authentication has not been performed (step S2: NO), the output unit 317 generates a response message for displaying a login screen for user authentication, and outputs it to the display device (step S3). The login screen includes an input form for a user ID and password. The user inputs the user ID and password on the login screen. In response, the display device transmits a request message with the values ​​of the user ID and password as request parameters.

[0044] When the input unit 312 accepts the request message, the authentication unit 313 performs authentication processing by checking the user ID and password associated with the response parameters against the data in the account table 353 (step S4).

[0045] If user authentication has been completed (step S2: YES), or if the authentication process has been completed in step S4, the work analysis device 300 starts generating a display screen for information regarding the remaining operating time of the work machine 100. The input unit 312 determines whether or not a value of a construction machine ID that identifies the construction machine 100 to be displayed is specified as a request parameter in the request message (step S5). If the value of the work machine ID is not specified as the request parameter (step S5 : NO), the input unit 312 determines the work machine 100 associated with the first work machine ID among the one or more work machines 100 associated with the authenticated user in the account table 353 as the target work machine (step S6). When a value of a work machine ID is specified as a request parameter (step S5: YES), the input unit 312 determines whether or not the value of the work machine ID is associated with the authenticated user in the account table 353 (step S7). When the value of the work machine ID is associated with the authenticated user in the account table 353 (step S7: YES), the input unit 312 determines the work machine 100 related to the work machine ID as the target work machine (step S8). If the value of the work machine ID is not associated with the authenticated user in the account table 353, the input unit 312 determines the work machine 100 associated with the first work machine ID among the one or more work machines 100 associated with the authenticated user in the account table 353 as the target work machine (step S6).

[0046] The input unit 312 determines whether or not the request message includes a value of the target period to be analyzed as a request parameter (step S9). If the value of the target period is not included as a request parameter (step S9: NO), the input unit 312 determines the target period to be the period associated with the authenticated user in the account table 353 (step S10). If the value of the target period is included as the request parameter (step S9: YES), the input unit 312 determines the target period to be the period specified by the request parameter (step S11). The input unit 312 rewrites the value of the target period associated with the authenticated user in the account table 353 to the value set in the request parameter.

[0047] The estimation unit 314 reads out the determined work machine ID, the measurement data associated with times within the target period ending at the current time, and the operation amount of the operation device 143 as time-series data from the state table 352 of the storage 35 (step S12). The estimation unit 314 inputs the read-out time-series data into the prediction model 351, thereby generating a time series of work categories of the work machine 100 within the target period.

[0048] The power calculation unit 315 calculates the power consumption and charging power per unit time based on the time series of the task divisions and the measurement data of the power sensor (step S13). Specifically, the power calculation unit 315 calculates the power consumption per unit time by dividing the sum of the measurement data of the power sensor in the target period acquired by the data acquisition unit 311 by the length of the target period. Furthermore, the power calculation unit 315 divides the measurement data of the power sensor into task divisions based on the time series of the task divisions. The power calculation unit 315 calculates the power consumption per unit time for each task division by dividing the sum of the measurement data of the power sensor by the length of time related to the corresponding division. Furthermore, the power calculation unit 315 calculates the charging power per unit time by dividing the sum of the charging power represented by the measurement data when the battery 121 is being charged, among the measurement data of the power sensor, by the charging time.

[0049] The time calculation unit 316 calculates the remaining operation time and the remaining charging time based on the power consumption and charging power per unit time calculated in step S13 (step S14). Specifically, the time calculation unit 316 calculates the remaining operation time when the work in the target period is repeated and the operation time when only the work of each category is repeated by dividing the remaining capacity of the battery 121 acquired by the data acquisition unit 311 by the power consumption per unit time calculated by the power calculation unit 315. The time calculation unit 316 calculates the remaining charging time by dividing the difference between the maximum capacity of the battery 121 and the remaining capacity of the battery 121 acquired by the data acquisition unit 311 by the charging power per unit time calculated by the power calculation unit 315.

[0050] The output unit 317 generates a display screen that displays the current remaining amount of the battery 121, the change in the remaining amount up to the present, the remaining operating time, and the charging time, and transmits a response message for displaying the display screen (step S15).

[0051] 6 is a diagram showing an example of a display screen according to the first embodiment. The display screen includes a work machine selection form G1, a battery remaining amount graph G2, a remaining operating time graph G3, a charging time graph G4, and a battery remaining amount transition graph G5. The work machine selection form G1 accepts the selection of the work machine 100 associated with the authenticated user. On the display screen, the initial value of the work machine selection form G1 indicates the target work machine determined in step S6 or step S8. The battery remaining capacity graph G2 displays the remaining capacity of the battery 121 in percentage. The remaining operation time graph G3 shows the remaining operation time in the case of standard use, the remaining operation time in the case of the most recent N hours of use, the remaining operation time in the case of only traveling, the remaining operation time in the case of only loading a dump truck, and the remaining operation time in the case of only other work, using a bar graph and a numerical value (the end timing of the operable period). The remaining operation time in the case of standard use is the remaining operation time calculated based on the standard power consumption assumed at the time of designing the work machine 100, not based on the data received from the work machine 100. The end timing of the operable period is obtained by adding the remaining operation time to the current time. In the remaining operation time graph G3, the "N hours" in the label of the remaining operation time in the case of the most recent N hours of use is a list box, and any period can be selected. Note that the display screen may display either the remaining operation time or the end timing of the operable period. The charging time graph G4, like the remaining operating time graph G3, shows the length of the charging time using a bar graph and numerical values. The battery remaining capacity transition graph G5 is a bar graph showing the transition of the remaining capacity of the battery 121 over one day.

[0052] By visually checking the display screen shown in FIG. 6, the user can perform operations taking into consideration the remaining operating time of the work machine 100. The user can display the status of the battery 121 of other work machines 100 by changing the value in the work machine selection form G1 shown in Fig. 6 using the display device. When the user changes the value in the work machine selection form G1, the display device returns the process to step S1 and transmits a request message in which the changed value of the work machine ID is specified as the request parameter. A user can change the value of the target period in the remaining operating time graph G3 shown in Fig. 6 using the display device to change the period for which other power consumption is calculated. When the user changes the value of the target period in the remaining operating time graph G3, the display device returns to step S1 and transmits a request message in which the changed value of the target period is specified as a request parameter. The input unit 312 accepts input of the value of the target period through the request message. In other words, the input unit 312 is an example of a period input unit.

[0053] The user can operate the display device to send a request message to the work analysis apparatus 300 requesting a change of the threshold used to determine the warning in step S16. The request message specifies the changed threshold as a request parameter. When the input unit 312 of the work analysis apparatus 300 receives a request message in which a threshold is specified in the request parameter, it rewrites the threshold associated with the user ID of the sender of the request message in the account table 353. In other words, the input unit 312 is an example of a threshold input unit.

[0054] Aside from generating a display screen based on a request from a user as shown in Fig. 5, the warning unit 318 of the work analysis device 300 determines at regular time intervals whether or not the remaining operating time when using the work machine 100 in a usage mode related to a target period recorded in the account table 353 falls below a threshold value recorded in the account table 353. If the remaining operating time falls below the threshold value, the warning unit 318 issues a warning about the remaining operating time to the user associated with the threshold value. For example, the warning unit 318 may send a warning e-mail to the user's e-mail address, or may send a push notification to a display device associated with the user.

[0055] Actions and Effects Thus, according to the first embodiment, the work analysis device 300 includes a time calculation unit 316 and an output unit 317. The time calculation unit 316 calculates the remaining operation time of the work machine 100 based on the remaining charge of the battery 121 and the behavior of the work machine 100 within a predetermined period of time. The output unit 317 outputs a signal for displaying the remaining operation time. This allows the work analysis device 300 to present the remaining operation time according to the behavior of the work machine 100. Therefore, the work analysis device 300 can present the remaining operation time with high reliability.

[0056] Moreover, the work analysis device 300 according to the first embodiment further includes an estimation unit 314. The estimation unit 314 estimates the progress of the work content of the work machine 100 over a predetermined period of time based on the measurement signals of the work machine 100. The time calculation unit 316 calculates the remaining operating time if the predetermined work content (traveling, dump loading, etc.) is continued based on the power consumption related to the predetermined work content. This allows the user to consider the content of work that can be performed before charging and the work time. In particular, by the time calculation unit 316 calculating the remaining operating time related to the traveling of the work machine 100, the user can consider whether or not to continue the work based on the time required for traveling to a charging station to charge the battery 121.

[0057] Other Embodiments Although one embodiment has been described in detail above with reference to the drawings, the specific configuration is not limited to that described above, and various design changes and the like are possible. That is, in other embodiments, the order of the above-mentioned processes may be changed as appropriate. Also, some processes may be executed in parallel. For example, the order of the determination of the target work machine shown in steps S5 to S8 and the determination of the target period shown in steps S9 to S11 may be interchanged, or may be performed simultaneously.

[0058] The work analysis device 300 according to the embodiment described above may be configured by a single computer, or the configuration of the work analysis device 300 may be divided and arranged across multiple computers that work together to function as the work analysis device 300. In this case, some of the computers that configure the work analysis device 300 may be mounted inside the work machine 100 (for example, realized by the control device 160), and other computers may be provided outside the work machine.

[0059] The work analysis device 300 according to the embodiment described above has been described as an example in which the charging time required for the battery 121 to be fully charged is displayed on the display screen, but the charging time required for the battery 121 to reach a battery charge amount designated by the user may also be displayed. The battery charge amount designated by the user is, for example, a value between 70% and 90% of the remaining battery charge relative to full charge. In this case, the time calculation unit 316 calculates the remaining charging time by dividing the difference between the battery charge amount designated by the user and the remaining amount of the battery 121 acquired by the data acquisition unit 311 by the charging power per unit time calculated by the power calculation unit 315.

[0060] The work analysis device 300 may also display on the display screen, together with the charging time graph G4, the remaining operating time and the end timing of the operable period when the battery is fully charged. The work analysis device 300 may also display the remaining operating time and the end timing of the operable period when the charge amount of the battery 121 reaches the battery charge amount designated by the user.

[0061] Furthermore, the work analysis device 300 according to the embodiment described above is a web server, and a display screen is displayed when a display device accesses the work analysis device 300. Meanwhile, in other embodiments, the work analysis device 300 may be implemented in the control device 160 or operation terminal 142 of the work machine 100, and the work analysis device 300 may perform analysis and display control offline. [Explanation of symbols]

[0062] 1...Display control system 100...Work machine 110...Traveling body 111...Crawler track 112...Traveling motor 120...Rotating body 121...Battery 122...Hydraulic pump 123...Control valve 124...Rotation motor 130...Work machine 131...Boom 131C...Boom cylinder 132...Arm 132C...Arm cylinder 133...Bucket 133C...Bucket cylinder 140...Driver's cab 141...Driver's seat 142...Operation terminal 143...Operation device 143LF...Left foot pedal 143LO...Left operation lever 143LT...Left travel lever 143RF...Right foot pedal 143RO...Right operation lever 143RT...Right travel lever 143TB...Swing brake pedal 160...Control device 300...Work analysis device 31...Processor 311...Data acquisition unit 312...Input unit 313...Authentication section 314...Estimation section 315...Power calculation section 316...Time calculation section 317...Output section 318...Warning section 33...Main memory 35...Storage 351...Prediction model 352...Status table 353...Account table 37...Interface G1...Work machine selection form G2...Battery remaining amount graph G3...Remaining operating time graph G4...Charging time graph G5...Battery remaining amount transition graph T...Loading target

Claims

1. A display control system for a battery-powered work machine, comprising: a calculation unit that calculates information regarding a remaining operating time of the work machine based on a remaining charge of the battery and a behavior of the work machine within a predetermined period of time; an output unit that outputs a signal for displaying information regarding the remaining operating time; A display control system comprising:

2. an estimation unit that estimates a transition in work content of the work machine during the predetermined period based on a measurement signal of the work machine, The calculation unit calculates information regarding the remaining operation time based on the estimated change in the work content. The display control system according to claim 1 .

3. The information regarding the remaining operating time includes a remaining operating time, The calculation unit specifies the power consumption related to a predetermined work content based on the estimated change in the work content and the change in the power consumption within the predetermined period, and calculates a remaining operating time in the case where the work machine continues the predetermined work content. The display control system according to claim 2 .

4. The calculation unit specifies the power consumption related to the traveling of the work machine based on the estimated change in the work content and the change in the power consumption within the specified period, and calculates the remaining operating time if the work machine continues traveling. The display control system according to claim 3 .

5. The information regarding the remaining operating time includes an end timing of the operable period. The display control system according to any one of claims 1 to 4.

6. A period input unit for receiving input of the predetermined period The display control system according to any one of claims 1 to 4.

7. A warning unit that issues a warning when the remaining operating time falls below a threshold value. The display control system according to claim 3 or 4.

8. A threshold input unit is provided for receiving the input of the threshold The display control system according to claim 7.

9. A display device that displays information about the remaining operating time based on the signal. The display control system according to claim 1 or 2, comprising:

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