Display control system for work machine

Abstract

In the present invention, an output unit outputs a value related to the power consumption in a target time band and the work content of the work machine in the target time band.

Description

Display control system for work machines

[0001] This disclosure relates to a display control system for a work machine. This application claims priority to Japanese Patent Application No. 2023-106847, filed on June 29, 2023, the contents of which are incorporated herein by reference.

[0002] Electrically driven work machines, which are zero-emission and quiet, are sometimes used for construction work in urban areas, etc. Electrically driven work machines do not have engines or fuel tanks, but instead have electric motors that drive hydraulic pumps and other devices, and power storage devices such as batteries that supply power to the electric motors. 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 that displays the remaining battery charge and remaining operating time of the work vehicle.

[0003] Japanese Patent Application Publication No. 2007-288894

[0004] However, the power consumption of a work machine varies depending on the behavior of the work machine. Therefore, it is necessary to make the user aware of the relationship between the work content and the power consumption. An object of the present disclosure is to provide a work machine display control system that can make the user aware of the relationship between the work content and the power consumption.

[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 an output unit that outputs a value related to power consumption during a target time period and the work content of the work machine during the target time period.

[0006] According to the above aspect, the display control system can allow the user to recognize the relationship between the work content and the power consumption.

[0007] Fig. 1 is a schematic diagram showing the configuration of a display control system according to a first embodiment. Fig. 2 is a diagram showing the configuration of a work machine according to the first embodiment. Fig. 3 is a diagram showing the internal configuration of a driver's cab according to the first embodiment. Fig. 4 is a schematic block diagram showing the configuration of a work analysis device according to the first embodiment. Fig. 5 is a flowchart showing a screen presentation method by the work analysis device according to the first embodiment. Fig. 6 is a diagram showing an example of a display screen according to the first embodiment.

[0008] <First Embodiment> <Overall Configuration> Figure 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 the work of the work machine 100 and generates a screen that displays the work history and remaining operating time of the work machine. By visually checking the screen output by the work analysis device 300, the user can recognize the remaining operating time of the work machine 100.

[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 hydraulic excavators and wheel loaders. 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 sent to the work analysis device 300.

[0010] <Working Machine 100> Figure 2 is a diagram showing the configuration of a working machine 100 according to the first embodiment. The working machine 100 operates at a construction site, excavates a work object such as earth 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 working machine 100 include a face shovel, a backhoe shovel, and a rope shovel. The working machine 100 may be electrically driven or hydraulically driven. The working machine 100 according to the first embodiment is a backhoe shovel. The working machine 100 includes a traveling body 110, a revolving body 120, a work implement 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 travel. The running body 110 is equipped with two caterpillar tracks 111, one on the left and one on the right, and two travel motors 112 for driving each caterpillar track 111. The running body 110 is an example of a support section. The rotating body 120 is supported on the running body 110 so that it can rotate about a rotation center. The work implement 130 is hydraulically driven. The work implement 130 is supported on the front part of the rotating body 120 so that it can be driven in the vertical direction. The cab 140 is a space where an operator boards and operates the work machine 100. The cab 140 is provided on the front left part of the rotating body 120. Here, the part of the rotating body 120 to which the work implement 130 is attached is referred to as the front part. Furthermore, with respect to the rotating body 120, the opposite part, left part, and right part are referred to as the rear, left part, and right part, respectively, based on the front part.

[0012] <Configuration of the Swing Unit 120> The swing unit 120 includes a battery 121, a hydraulic pump 122, a control valve 123, and a swing motor 124. 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 to each actuator (boom cylinder 131C, arm cylinder 132C, bucket cylinder 133C, travel motor 112, and swing motor 124) via a control valve 123. The control valve 123 controls the flow rate of hydraulic oil supplied from the hydraulic pump 122. The swing motor 124 is driven by hydraulic oil supplied from the hydraulic pump 122 via the control valve 123, causing the swing unit 120 to swing.

[0013] <Configuration of Work Machine 130> The work machine 130 includes a boom 131, an arm 132, a bucket 133 as a work implement, a boom cylinder 131C, an arm cylinder 132C, and a bucket cylinder 133C. Other examples of the work implement include tip 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 unit 120 via a boom pin. Note that, in the work machine 100 shown in FIG. 1 , the boom 131 is provided in the center portion of the front of the revolving unit 120, but this is not limiting, and the boom 131 may be attached offset in the left-right direction. In this case, the center of rotation of the revolving unit 120 is not located on the operating plane of the work implement 130. The arm 132 connects the boom 131 and the bucket 133. The base end of the arm 132 is rotatably attached to the tip of the boom 131 via an arm pin. The bucket 133 is rotatably attached to the tip of the arm 132 via a pin. The boom 131 and the arm 132 are members that support the bucket 133. The bucket 133 functions as a container for collecting 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 revolving unit 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 Cab 140> Fig. 3 is a diagram showing the internal configuration of the 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 cab 140. The operation terminal 142 is provided near the driver's seat 141. The operation terminal 142 may be a display device formed of, 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 revolving body 120, and the work machine 130 through 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 swing operation of the revolving unit 120 and the excavation / dump 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 a dump operation. When the operator of the work machine 100 tilts the left operation lever 143LO rearward, the arm 132 performs an excavation operation. When the operator of the work machine 100 tilts the left operation lever 143LO to the right, the revolving unit 120 swings to the right. When the operator of the work machine 100 tilts the left operation lever 143LO to the left, the revolving unit 120 swings to the left. Note that in other embodiments, the revolving unit 120 may swing to the right or left when the left operation lever 143LO is tilted forward or backward, and the arm 132 may perform an excavation or dump operation when the left operation lever 143LO is tilted left or right.

[0020] The right operating lever 143RO is an operating mechanism for performing the excavation / dumping operation of the bucket 133 and the raising / lowering operation of the boom 131. Specifically, when the operator of the work machine 100 tilts the right operating lever 143RO forward, the boom 131 is lowered. When the operator of the work machine 100 tilts the right operating lever 143RO rearward, the boom 131 is raised. When the operator of the work machine 100 tilts the right operating lever 143RO to the right, the bucket 133 is dumped. When the operator of the work machine 100 tilts the right operating lever 143RO to the left, the bucket 133 is excavated. Note that in other embodiments, when the right operating lever 143RO is tilted forward or backward, the bucket 133 may be dumped or excavated, and when the right operating lever 143RO is tilted left or right, the boom 131 may be raised or lowered.

[0021] The left foot pedal 143LF is located on the left side of the floor in front of the driver's seat 141. The right foot pedal 143RF is located on the right side of the floor in front of the driver's seat 141. The left travel lever 143LT is pivotally supported by the left foot pedal 143LF, and is configured so that tilting the left travel lever 143LT and pushing down the left foot pedal 143LF are linked. The right travel lever 143RT is pivotally supported by the right foot pedal 143RF, and is configured so that tilting the right travel lever 143RT and pushing down the right foot pedal 143RF are linked.

[0022] The left foot pedal 143LF and left travel 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 travel 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 travel lever 143LT backward, the left crawler belt rotates in the reverse direction.

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

[0024] The control device 160 collects measurement data collected from multiple sensors equipped on the work machine 100 and the operation amounts of the operation device 143, and stores the data in association with timestamps. The control device 160 also transmits the time series of the measurement data and operation amounts 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 the data aggregation program from the storage and expands it in the main memory, and executes the collection process and transmission process of the measurement data and operation amounts 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 also be equipped with sensors such as a cylinder stroke sensor that identifies the attitude of the work implement 130, a pressure sensor that identifies the weight of the work implement 130, and an IMU that measures the swing angle of the swing unit 120.

[0026] <<Configuration of the Work Analysis Device>> Figure 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 comprising a processor 31, main memory 33, storage 35, and interface 37. The storage 35 stores a work analysis program. The processor 31 reads the work analysis program from the storage 35, loads it into the main memory 33, and executes processing in accordance with the work analysis program. Note that the work analysis device 300 according to the first embodiment is provided external to the work machine 100, but 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 internal media directly connected to the common communication line of the work analysis device 300, or may be external media connected to the work analysis device 300 via an interface 37. The storage 35 is a non-transitory tangible storage medium.

[0028] By executing the task analysis program, the processor 31 is equipped with a data acquisition unit 311, an input unit 312, an authentication unit 313, an estimation unit 314, and an output unit 315. The task analysis program stored in the storage 35 includes a prediction model 351. The prediction model is a trained model that has been trained to input time series of measurement data and operation amounts and output a time series of task classifications. The prediction model 351 is trained using, as a training data set, a combination of time series of measurement data and operation amounts and time series of task classification labels of the work machine 100 at the time the measurement data was collected. The prediction model may be, for example, a neural network model. Furthermore, the storage 35 has reserved storage areas 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 the status data in association with each other. The account table 353 stores a user ID, a password, and one or more work machine IDs for which viewing of the status data is permitted in association with each other.

[0030] The work analysis device 300 according to the first embodiment functions as a web server. That is, the work analysis device 300 receives a request message (HTTP request) from a display device operated by a user, executes predetermined processing, 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 associates the acquired time series of status data with the ID of the work machine 100 and stores it in the status table 352 of the storage 35.

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

[0033] The authentication unit 313 performs a user authentication process. 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. Specifically, the estimation unit 314 obtains a time series of task divisions by inputting the time series data of the status data into the prediction model.

[0035] The estimation unit 314 identifies task classifications into unit task classifications and element task classifications. A unit task is a task that accomplishes a single task purpose. An element task is an element that constitutes a unit task and represents a series of actions or tasks classified by purpose.

[0036] Examples of classifications of elemental work include "excavation," "loaded rotation," "earth removal," "empty rotation," "waiting for earth removal," "load holding," "rolling compaction," "leveling," and "brooming." Excavation is the work of digging up and scraping away soil or rocks using the bucket 133. Loaded rotation is the work of rotating the rotating body 120 while the bucket 133 holds the scraped soil or rocks. Soil removal is the work of lowering the scraped soil or rocks from the bucket 133 onto a transport vehicle or a predetermined location. Empty rotation is the work of rotating the rotating body 120 without soil or rocks in the bucket 133. Waiting for earth removal is the work of waiting for a transport vehicle to load the scraped soil or rocks while the bucket 133 holds them. Load holding is the work of pressing down the soil loaded on the load of the transport vehicle from above with the bucket 133 to level it. Compaction is the work of pushing soil and sand into disturbed ground with the bucket 133 to shape and strengthen the ground. Leveling is the work of sweeping and leveling the soil and sand with the bottom of the bucket 133. Brooming is the work of sweeping and leveling the soil and sand with the side of the bucket 133.

[0037] Examples of unit task categories include "dump truck loading," "load collection," "traveling," "parking," and "charging." Dump truck loading is the task of digging up and scraping away earth or rocks, and loading the scraped earth or rocks onto the bed of a transport vehicle such as a dump truck. Dump truck loading is a unit task consisting of excavation, loading rotation, earth removal, empty load rotation, waiting for earth removal, and bed holding. Load collection is the task of collecting earth removed by excavation or the like before loading it onto a transport vehicle. Load collection is a unit task consisting of excavation, loading rotation, earth removal, and empty load rotation, and may include pushing and leveling. Traveling is the task of moving the work machine 100. Traveling as a unit task is a unit task consisting of traveling as an element task. Parking is a state in which the bucket 133 is clear of earth or rocks and is stopped for a predetermined period of time or longer. Parking as a unit task is a unit task consisting of stopping as an element task. Charging is the process of charging the battery 121 .

[0038] The output unit 315 outputs a response message for displaying a display screen of the task category estimated by the estimation unit 314 .

[0039] <<Operation of Display Control System 1>> The control device 160 of the work machine 100 transmits sensor measurement data and time-series data of the operation amount of the operation device 143 at regular 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.

[0040] 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 using a web browser on the display device. The display device may be the operation terminal 142 of the work machine 100.

[0041] 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 and content of some processes may differ 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 the user has been authenticated (step S2). If authentication has not been successful (step S2: NO), the output unit 315 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 enters the user ID and password on the login screen. In response, the display device transmits a request message with the user ID and password values ​​as request parameters.

[0042] When the input unit 312 receives 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).

[0043] If user authentication has been completed (step S2: YES), or if the authentication processing has been completed in step S4, the work analysis device 300 begins generating a display screen for the remaining operating time of the work machine 100. The input unit 312 determines whether or not a work machine ID value that identifies the work machine 100 to be displayed has been specified as a request parameter in the request message (step S5). If a work machine ID value has not been specified as a request parameter (step S5: NO), the input unit 312 determines that the work machine 100 associated with the first work machine ID of the one or more work machines 100 associated with the authenticated user in the account table 353 is the target work machine (step S6). If a work machine ID value has been specified as a request parameter (step S5: YES), the input unit 312 determines whether or not the work machine ID value is associated with the authenticated user in the account table 353 (step S7). If 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 associated with that 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 (step S7: NO), the input unit 312 determines the work machine 100 associated with the first work machine ID of the one or more work machines 100 associated with the authenticated user in the account table 353 as the target work machine (step S6).

[0044] The estimation unit 314 reads out the determined work machine ID, the measurement data associated with times within a 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 S9). The target period is, for example, 24 hours. The end and start points of the target period may be arbitrarily specified by the user. 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 (step S10).

[0045] The output unit 315 generates a display screen that displays the progress of the remaining charge of the battery 121, the progress of the work sections performed by the work machine 100, and the behavior of the work machine 100 during a specific time period, and transmits a response message for displaying the display screen (step S11). Figure 6 is a diagram showing an example of a display screen according to the first embodiment.

[0046] The display screen includes a work machine selection form G1, a battery remaining capacity graph G2, a unit work graph G3, a work division map G4, and a three-dimensional model G5.

[0047] The work machine selection form G1 accepts the selection of a work machine 100 associated with an 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 amount graph G2 is a graph with the remaining battery amount on the vertical axis and time on the horizontal axis. The battery remaining amount graph G2 displays the remaining battery amount at the end of a time period divided into, for example, one hour, as a bar graph. The unit task graph G3 is a graph with the accumulated time on the vertical axis and time on the horizontal axis. The unit task graph G3 displays, for example, the execution time for each section of a unit task in a time period divided into one hour as a stacked bar graph. The battery remaining amount graph G2 and the unit task graph G3 display cursors G21 and G31 indicating the bar corresponding to the selected time period from among multiple bars. The task section map G4 is a map showing the change over time of task sections in a selected time period. The task section map G4 includes an element task map G41 and a unit task graph G42. The element work map G41 is a map in which plots representing element work divisions are added to a plane with the vertical axis representing element work divisions and the horizontal axis representing time. The unit work map G42 is a graph that aligns the horizontal axis with the element work map G41 and arranges unit work divisions by time. Each unit work division in the unit work map G42 is represented in a different color. A cursor G43 indicating the time is displayed on the work section map G4. The three-dimensional model G5 reproduces the posture of the work machine 100 at the time indicated by the cursor G43 on the work section map G4. Because the time indicated by the cursor G43 progresses over time, the three-dimensional model G5 displays, as an animation, the change in posture of the work machine 100 during the time periods indicated by the cursors G21 and G31.

[0048] The display screen data included in the response message for the display screen may include a script program written in JavaScript (registered trademark). For example, the display device may execute the script program to realize animation of the three-dimensional model G5. Specifically, the browser displaying the display screen executes the following process using the script program.

[0049] The display device accepts a user's selection of a time period to be displayed on the battery remaining amount graph G2 or the unit task graph G3. Specifically, the display device accepts the selection of a time period by clicking on any bar constituting the battery remaining amount graph G2 or the unit task graph G3. When a time period is selected, the display device displays cursors G21, G31 on the bar corresponding to the selected time period among the multiple bars constituting the battery remaining amount graph G2 and the unit task graph G3. The display device transmits a request message to the work analysis device 300 requesting time series data on the unit task and element task classifications for the selected time period, as well as time series data on the angles of the revolving unit 120, boom 131, arm 132, and bucket 133 for that time period. The request message includes request parameters indicating the selected time period. In response to the received request message, the output unit 315 of the work analysis device 300 transmits a response message including time series data on the unit task and element task classifications for the selected time period, as well as time series data on the angles of the revolving unit 120, boom 131, arm 132, and bucket 133 for that time period. The display device may execute the process related to the request message as an asynchronous process.

[0050] The display device draws a task section map G4 based on the received time-series data on the unit task and element task sections. The display device places a cursor G43 at a position on the task section map G4 that corresponds to the start of the time period. The display device moves the cursor G43 over time toward the end of the time period on the task section map G4. The display device draws a three-dimensional model G5 that represents the attitude of the work machine 100 at the time indicated by the cursor G43 based on the received time-series data on the angles of the revolving unit 120, boom 131, arm 132, and bucket 133. The display device changes the attitude of the three-dimensional model G5 as the cursor G43 moves. The cursor G43 can be moved to any time by a drag-and-drop operation or the like. At this time, the display device draws a three-dimensional model G5 that represents the attitude of the work machine 100 at the time indicated by the moved cursor G43.

[0051] When the display device accepts a change in the values ​​in the work machine selection form G1 from the user, it transmits a request message indicating the selected work machine ID to the work analysis device 300. In response, the work analysis device 300 executes the processing of FIG. 5.

[0052] <<Actions and Effects>> As described above, according to the first embodiment, the display control system 1 is equipped with an output unit 315 that outputs the remaining charge of the battery 121 during a target time period and the work content of the work machine 100 during the target time period. This allows the user to recognize the relationship between the work content and power consumption. In particular, the display control system 1 according to the first embodiment accepts the selection of a target time period from among a plurality of time periods, and outputs the work content for the selected target time period. This allows the user to recognize the relationship between the work content and power consumption during any time period.

[0053] The display control system 1 according to the first embodiment displays the remaining charge of the battery 121 for each time period, as shown in FIG. 6 , and accepts the specification of any time period. This allows the user to check what work was performed during a time period in which power consumption suddenly decreased. In other embodiments, the display control system 1 may display the power consumption of the battery 121 per unit time and the amount of power consumption during that time period, in addition to or instead of the remaining charge of the battery 121. The power consumption per unit time may be displayed for each unit task category. The power consumption and the amount of power consumption may be displayed, for example, as a line graph. In other embodiments, the display control system 1 may display the total power consumption of the battery 121 during a target period, in addition to or instead of the remaining charge of the battery 121. The display control system 1 may also display the power consumption for each unit task category. The display control system 1 can calculate the power consumption for each unit task category by integrating the power consumption for each unit task category during the time period in which that task is performed.

[0054] <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. Furthermore, 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 reversed, or may be performed simultaneously.

[0055] The work analysis device 300 according to the above-described embodiment may be configured by a single computer, or the configuration of the work analysis device 300 may be divided among multiple computers that cooperate with each other to function as the work analysis device 300. In this case, some of the computers that make up the work analysis device 300 may be installed inside the work machine 100 (for example, realized by the control device 160), and other computers may be provided external to the work machine.

[0056] Furthermore, the work analysis device 300 according to the above-described embodiment 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.

[0057] DESCRIPTION OF SYMBOLS 1...Display control system 100...Work machine 110...Traveling body 111...Crawler 112...Travel motor 120...Swinging body 121...Battery 122...Hydraulic pump 123...Control valve 124...Swing 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 unit 314: Estimation unit 315: Output unit 33: Main memory 35: Storage 351: Prediction model 352: Status table 353: Account table 37: Interface G1: Work machine selection form G2: Battery remaining capacity graph G3: Unit work graph G4: Work division map G5: Three-dimensional model T: Loading target

Claims

1. A display control system for a battery-powered work machine, comprising: an output unit that outputs a value related to power consumption in a target time period and the work content of the work machine in the target time period.

2. A display control system as described in claim 1, further comprising an input unit that accepts the selection of a target time period from among a plurality of time periods, and outputs the work content for the selected target time period.

3. The display control system according to claim 2, wherein the output unit outputs a value related to power consumption in each of the plurality of time periods.

4. A display control system as claimed in any one of claims 1 to 3, wherein the output unit outputs, as the work content, a graph showing a breakdown of the classification of unit work performed by the work machine during the target time period.

5. The display control system according to claim 4, wherein the classification of the unit work includes at least one of driving, stopping, and charging.

6. The display control system according to claim 4, wherein the work machine is a shovel, and the classification of the unit work includes dump loading.

7. A display control system as claimed in any one of claims 1 to 3, wherein the output unit outputs, as the work content, a graph showing the change over time in the classification of unit work and the classification of element work performed by the work machine during the target time period.

8. A display control system as claimed in any one of claims 1 to 3, wherein the output unit outputs, as the work content, an animation showing a change in the attitude of the work machine during the target time period.

9. A display control system according to any one of claims 1 to 3, comprising a display device for displaying information output by the output unit.

Images