Display control system for work machine and display method for work content

Abstract

An acquisition unit acquires vehicle body information of a work machine. An estimation unit estimates a work content of the work machine on the basis of the vehicle body information. A display control unit generates a signal for displaying information regarding the work content of the work machine estimated by the estimation unit. The work content includes spotting work which is a series of traveling states toward a loading spot in a loading site or a series of traveling states toward an earth dumping spot in an earth dumping site. The estimation unit estimates whether or not the work content of the work machine is the spotting work on the basis of the vehicle body information.

Description

DESCRIPTION Title of Invention DISPLAY CONTROL SYSTEM FOR WORK MACHINE AND DISPLAY METHOD FOR WORK CONTENT Technical Field

[0001] The present disclosure relates to a display control system for a work machine and a display method for a work content. The present application claims priority based on Japanese Patent Application No. 2024-030485 filed in Japan on February 29, 2024, the contents of which are incorporated herein by reference. Background Art

[0002] Patent Literature 1 discloses a technique for estimating a work state of a work machine that works at a work site. Patent Literature 1 describes estimating whether a work content of a dump truck is loading work, earth dumping work, loaded traveling, unloaded traveling, or stop. Citation List Patent Literature

[0003] Patent Literature 1: WO 2019 / 017159 A Summary of Invention Technical Problem

[0004] The time of an operation of stopping the work machine at a desired spot in a loading site or an earth dumping site, out of operations of the work machine by an operator, largely depends on the skill of the operator. There is a demand for appropriately evaluating such a work content in the loading site or the earth dumping site. An object of the present disclosure is to provide a display control system for a work machine and a display method for a work content capable of providing information for appropriately evaluating a work content in a loading site or an earth dumping site. Solution to Problem

[0005] According to one aspect of the present invention, a display control system for a work machine includes an acquisition unit that acquires vehicle body information of a work machine, an estimation unit that estimates a work content of the work machine on the basis of the vehicle body information, and a display control unit that generates a signal for displaying information regarding the work content of the work machine estimated by the estimation unit. The work content includes spotting work which is a series of traveling states toward a loading spot in a loading site or a series of traveling states toward an earth dumping spot in an earth dumping site. The estimation unit estimates whether or not the work content of the work machine is the spotting work on the basis of the vehicle body information. Advantageous Effects of Invention

[0006] According to the above aspect, a display control system for a work machine can provide information for appropriately evaluating a work content in a loading site or an earth dumping site. Brief Description of Drawings

[0007] Fig. 1 is a diagram illustrating an example of a work content estimation system according to a first embodiment. Fig. 2 is a diagram illustrating an example of a work area according to the first embodiment. Fig. 3 is a schematic view illustrating a configuration of a work machine according to the first embodiment. Fig. 4 is a schematic block diagram illustrating a configuration of a management device according to the first embodiment. Fig. 5 is a flowchart illustrating data collection processing by the management device according to the first embodiment. Fig. 6 is a flowchart illustrating analysis processing by the management device according to the first embodiment. Fig. 7 is an example of a histogram representing a loss time due to re-spotting according to the first embodiment. Description of Embodiments

[0008] <First Embodiment> <<Work Content Estimation System 1>> Fig. 1 is a diagram illustrating an example of a work content estimation system according to a first embodiment. A work content estimation system 1 according to the first embodiment analyzes a work content of a dump truck, which is a work machine 20, and displays the work content to a site supervisor. The site supervisor can evaluate the skill of an operator of the work machine 20 by checking the work content. The work content estimation system 1 includes a management device 10 and a plurality of work machines 20. The work content estimation system 1 is an example of a display control system for the work machine 20.

[0009] The management device 10 analyzes the work contents of the plurality of work machines 20 on the basis of vehicle body data of the work machines 20 and displays the work contents on a display. The work machine 20 transports a cargo generated at a work site G. Examples of the cargo transported by the work machine 20 include crushed stone, earth and sand, rock, and coal.

[0010] The work site G according to the first embodiment includes a loading site G1 and an earth dumping site G2. Hereinbelow, the loading site G1 and the earth dumping site G2 are each also referred to as a work area. The loading site G1 and the earth dumping site G2 are connected by a travel path G3. The travel path G3 includes a general road connecting the loading site G1 and the earth dumping site G2, and a conveyance path prepared in the work area for conveying earth and sand. The dump truck, which is the work machine 20, travels between the loading site G1 and the earth dumping site G2 in order to transport earth and sand.

[0011] Fig. 2 is a diagram illustrating an example of a work area according to the first embodiment. In the work area, a work spot SP1 where the work machine 20 performs work is defined. For example, a loading spot for performing loading work is provided in the loading site G1, and an earth dumping spot for performing earth dumping work is provided in the earth dumping site G2. In the first embodiment, the work machine 20 moves to the work spot SP1 by backward traveling. Therefore, a redirection spot SP2 for performing redirection of the work machine 20 is provided in the work area. In addition, when the work machine 20 arrives at the work area, a different work machine 20 may arrive earlier. In this case, the work machine 20 needs to stand by for completion of the work of the earlier work machine 20 at a standby spot SP3 in the work area.

[0012] Therefore, in a case where a different work machine 20 is present when the work machine 20 enters the work area, the work machine 20 moves to the standby spot SP3 and stands by for completion of the work of the different work machine 20. When the different work machine 20 leaves, the work machine 20 travels to the redirection spot SP2. The operator of the work machine 20 shifts the gear into reverse at the redirection spot SP2 and performs backward traveling to the work spot SP1. After completion of the work, the work machine 20 leaves the work area.

[0013] <<Configuration of Work Machine 20>> Fig. 3 is a schematic view illustrating a configuration of the work machine 20 according to the first embodiment. The work machine 20 includes a vehicle body 21, a vessel 22, a lift cylinder 23, a dump operation detection sensor 24, a wheel 25, a suspension cylinder 26, a suspension pressure sensor 27, a positioning device 28, and a computer 29.

[0014] The vessel 22 is a loading platform that loads a cargo. The vessel 22 is arranged at the upper portion of the vehicle body 21. The vessel 22 is driven by power transmitted from the vehicle body 21. The lift cylinder 23 is a hydraulic cylinder driven by hydraulic oil, and tilts the vessel 22 by driving. The dump operation detection sensor 24 detects whether or not the vessel 22 is in contact with the vehicle body 21. Note that the work machine 20 according to another embodiment may include, instead of the dump operation detection sensor 24, a stroke sensor that measures the stroke amount of the lift cylinder 23, and determine the dump operation on the basis of the measurement value of the stroke sensor.

[0015] The suspension cylinder 26 is provided between the wheel 25 and the vehicle body 21. The suspension cylinder 26 absorbs the impact that the wheel 25 receives from the road surface and reduces the vibration of the vehicle body 21. Hydraulic oil is sealed in the suspension cylinder 26, and the suspension cylinder 26 expands and contracts to absorb the impact. Note that the work machine 20 according to another embodiment may include a suspension device having an air spring or a shock absorber instead of the suspension cylinder 26.

[0016] The suspension pressure sensor 27 detects a load acting on the suspension cylinder 26. The suspension pressure sensor 27 is provided in each of the suspension cylinders 26 for the right and left front wheels and the right and left rear wheels of the work machine 20.

[0017] The positioning device 28 measures the position of the work machine 20 by a global navigation satellite system (GNSS). The position measured by the positioning device 28 is represented in a global coordinate system.

[0018] The computer 29 collects measurement data of the dump operation detection sensor 24, the suspension pressure sensor 27, and the positioning device 28, and transmits the data to the management device 10 as vehicle body data (vehicle body information). Whether or not the work machine 20 is performing the dumping work can be calculated from the measurement data of the dump operation detection sensor 24. The weight of the cargo of the work machine 20 can be calculated from the measurement data of the suspension pressure sensor 27. The computer 29 collects the vehicle body data in a predetermined cycle (for example, once in a second) and transmits the vehicle body data to the management device 10. The transmission to the management device 10 may be performed each time of collection or may be performed by batch processing.

[0019] <<Configuration of Management Device 10>> Fig. 4 is a schematic block diagram illustrating a configuration of the management device 10 according to the first embodiment. The management device 10 includes a processor, a memory, an auxiliary storage device, and the like connected by a bus. Examples of the processor include a central processing unit (CPU), a graphic processing unit (GPU), and a microprocessor. The management device 10 executes a program to execute calculation for specifying a work content of the dump truck. The program may be recorded in a computer-readable recording medium. The computer- readable recording medium is, for example, a storage device such as a magnetic disk, a magneto-optical disk, an optical disk, or a semiconductor memory. The program may be received from the outside via an electric communication line. Note that all or some of the functions of the management device 10 may be implemented using a custom large scale integrated circuit (LSI) such as an application specific integrated circuit (ASIC) or a programmable logic device (PLD). Examples of the PLD include a programmable array logic (PAL), a generic array logic (GAL), a complex programmable logic device (CPLD), and a field programmable gate array (FPGA). Such an integrated circuit is also included in examples of the processor.

[0020] The management device 10 includes a vehicle body data acquisition unit 11, a data storage unit 12, a state calculation unit 13, an estimation unit 14, a selection unit 15, an evaluation unit 16, and a display control unit 17. That is, the processor of the management device 10 includes the vehicle body data acquisition unit 11, the data storage unit 12, the state calculation unit 13, the estimation unit 14, the selection unit 15, the evaluation unit 16, and the display control unit 17 by executing the program.

[0021] The vehicle body data acquisition unit 11 acquires the vehicle body data from the work machine 20, and records the vehicle body data in the data storage unit 12 in association with the acquisition time. The vehicle body data acquisition unit 11 corresponds to an acquisition unit of the present disclosure. The vehicle body data of the work machine 20 includes at least measurement data of the suspension pressure and the position of the work machine 20.

[0022] Based on the vehicle body data acquired by the vehicle body data acquisition unit 11, the state calculation unit 13 calculates state data representing the state of the work machine 20 at the time point related to the vehicle body data. Specifically, the state calculation unit 13 calculates a cargo weight of the work machine 20 on the basis of the measurement data of the suspension pressure of the work machine 20. For example, the state calculation unit 13 calculates a cargo weight, traveling speed, and a primary category of a work content by the following procedure. The primary category of the work content indicates any value of stop, loading work, loaded traveling, earth dumping work, and unloaded traveling. The state calculation unit 13 records the calculated state data in the data storage unit 12 in association with the vehicle body data.

[0023] The state calculation unit 13 calculates a cargo weight by substituting a value obtained by applying a low- pass filter to the measurement data of the suspension pressure into a conversion function of the pressure and the cargo weight. The state calculation unit 13 calculates traveling speed of the work machine 20 on the basis of position data of the work machine 20.

[0024] The state calculation unit 13 calculates the primary category of the work content of the work machine 20 on the basis of the cargo weight and the traveling speed. Specifically, in a case where the traveling speed of the work machine 20 is less than a predetermined value and the change amount of the cargo weight is less than a predetermined value, the state calculation unit 13 sets the primary category of the work content as "stop". In a case where the traveling speed of the work machine 20 is less than a predetermined value and the cargo weight increases by a predetermined change amount or more, the state calculation unit 13 sets the primary category of the work content as "loading work". In a case where the traveling speed of the work machine 20 is less than a predetermined value and the cargo weight decreases by a predetermined change amount or more, the state calculation unit 13 sets the primary category of the work content as "earth dumping work". In a case where the traveling speed of the work machine 20 is a predetermined value or more and the cargo weight is a predetermined value or more, the state calculation unit 13 sets the primary category of the work content as "loaded traveling". In a case where the traveling speed of the work machine 20 is a predetermined value or more and the cargo weight is less than a predetermined value, the state calculation unit 13 sets the primary category of the work content as "unloaded traveling".

[0025] In another embodiment, the computer 29 of the work machine 20 may calculate the state data and transmit the state data as well as the vehicle body data to the management device 10.

[0026] The estimation unit 14 estimates a work content in the area (work area) of the work machine 20 on the basis of a time series of the data stored in the data storage unit 12. The estimation unit 14 estimates which of secondary categories including queuing, pre-spotting, spotting, and re-spotting the work content in the area of the work machine 20 is. The queuing is a state in which the work machine 20 enters the area and stands by for completion of the work of a different work machine 20 at the standby spot SP3. The pre-spotting is a series of traveling states in which the work machine 20 moves to the redirection spot SP2 for redirection. The spotting is a series of traveling states in which the work machine 20 moves to the work spot SP1 by backward traveling. The re-spotting is a series of traveling states in which a re-doing operation for adjusting the spotting position of the work machine 20 to the work spot SP1 is performed. Note that the re-spotting is an example of inefficient work. The estimation unit 14 records the estimated work content in the data storage unit 12 in association with the vehicle body data.

[0027] The selection unit 15 allows a user such as a site supervisor to select a work site the information of which the user desires to view. The evaluation unit 16 calculates an evaluation value related to a driving evaluation of the operator on the basis of the data stored in the data storage unit 12. The display control unit 17 generates a signal for displaying the evaluation value calculated by the evaluation unit 16, and outputs the signal to the display.

[0028] <<Operation of Work Content Estimation System 1>> Fig. 5 is a flowchart illustrating data collection processing by the management device 10 according to the first embodiment. The computer 29 of the work machine 20 collects measurement data from various sensors while the work machine 20 is in operation, and transmits the collected measurement data and the measurement time thereof as vehicle body data to the management device 10 in a timely manner. When receiving the vehicle body data from the work machine 20 (step S1), the vehicle body data acquisition unit 11 of the management device 10 records the vehicle body data in the data storage unit 12 in association with an ID of the work machine 20 (step S2). The state calculation unit 13 calculates state data of the work machine 20 on the basis of the vehicle body data received from the work machine 20 and the latest vehicle body data of the work machine 20 recorded in the data storage unit 12 (step S3). The state calculation unit 13 records the calculated state data in the data storage unit 12 in association with the vehicle body data received in step S1 (step S4). In a case where the vehicle body data acquisition unit 11 acquires the vehicle body data from time t1 to time tn in step S1, the state calculation unit 13 calculates the state data from the time t1 to the time tn in step S3.

[0029] Fig. 6 is a flowchart illustrating analysis processing by the management device 10 according to the first embodiment. The management device 10 performs work analysis of the work machine 20 based on the data stored in the data storage unit 12 at a predetermined time. The time when the work analysis is performed may be a predetermined time or a time when the user gives an instruction. The estimation unit 14 of the management device 10 reads the vehicle data and the state data related to a target period for the work analysis from the data storage unit 12 (step S11). Since the vehicle data and the state data are associated with the ID of the work machine 20 and the time, the vehicle data and the state data are treated as time series data for each work machine 20. The estimation unit 14 selects the work machines 20 one by one (step S12) and executes the following processing.

[0030] The estimation unit 14 divides the time series data related to the work machine 20 selected in step S12 into time series parts that have the same value of the primary category of the work content, and calculates aggregated data representing feature values for each time series part (step S13). The estimation unit 14 calculates aggregated data including a time zone, a primary category of a work content, a forward traveling distance, and a reverse traveling distance for each divided time series part. The traveling distance may be calculated, for example, by partial integration of the traveling speed. Subsequently, the estimation unit 14 selects aggregated data the value of the primary category of which is "loading work" or "earth dumping work" one by one as first aggregated data from among the divided time series parts (step S14).

[0031] The estimation unit 14 extracts aggregated data related to a time before the first aggregated data selected in step S14, having a forward traveling distance exceeding a predetermined value, and related to a time zone closest to the first aggregated data as second aggregated data representing traveling to the area (step S15). The estimation unit 14 extracts aggregated data having a reverse traveling distance exceeding a predetermined distance as third aggregated data representing spotting work from data between the first aggregated data and the second aggregated data (step S16).

[0032] The estimation unit 14 determines whether or not the forward traveling distance related to the third aggregated data exceeds a predetermined distance (for example, 1 / 2 of the vehicle body length of the work machine 20) (step S17). In a case where the forward traveling distance related to the third aggregated data exceeds the predetermined distance (step S17: YES), the estimation unit 14 determines that the third aggregated data includes re-spotting work. In the time zone related to the third aggregated data, the estimation unit 14 specifies a portion before the time when the backward traveling is first switched to the forward traveling as a time zone related to the spotting work serving as a secondary category, and specifies a portion after the time as a time zone related to the re-spotting work serving as the secondary category (step S18). In a case where the forward traveling distance related to the third aggregated data does not exceed the predetermined distance (step S17: YES), the estimation unit 14 determines that the third aggregated data does not include the re-spotting work. That is, the estimation unit 14 determines the value for the secondary category of the work content in the time zone related to the third aggregated data as the spotting.

[0033] The estimation unit 14 extracts aggregated data the primary category of which is stop as fourth aggregated data representing queuing work from data between the second aggregated data and the third aggregated data (step S19). That is, the estimation unit 14 determines the value for the secondary category of the work content in the time zone related to the fourth aggregated data as the queuing. Note that, in a case where there is no aggregated data the primary category of which is stop between the second aggregated data and the third aggregated data, the estimation unit 14 may estimate that there is no queuing work.

[0034] The estimation unit 14 extracts aggregated data having the longest forward traveling distance as fifth aggregated data representing pre-spotting from data between the third aggregated data and the fourth aggregated data (step S20). That is, the estimation unit 14 determines the value for the secondary category of the work content in the time zone related to the fifth aggregated data as the pre- spotting.

[0035] In a case where work selected in step S14 is the earth dumping work (step S21: earth dumping work), the estimation unit 14 estimates the value for the secondary category from the start time point of the first aggregated data (that is, the spotting end time point) to a time when a part of the vessel 22 is separated from the vehicle body 21 as pre-dumping (step S22). In addition, the estimation unit 14 estimates the value for the secondary category from the end time point of the pre-dumping to a time point when the traveling speed becomes higher than a predetermined value (for example, 0) as the earth dumping work (step S23). Subsequently, the estimation unit 14 specifies the value for the secondary category of the period from the end of the earth dumping work to a time when the entire vessel 22 comes into contact with the vehicle body 21 as post- dumping (step S24). On the other hand, in a case where work selected in step S14 is the loading work (step S21: loading work), the estimation unit 14 specifies the value for the secondary category from the start time point of the first aggregated data to the time point when the traveling speed becomes higher than a predetermined value (for example, 0) as the loading work (step S25).

[0036] The estimation unit 14 records the value for the secondary category estimated in steps S16 to S25 in the data storage unit 12 in association with the work data (step S26).

[0037] When evaluating work at a work site, the user operates the management device 10 to input an instruction to display evaluation information.

[0038] The selection unit 15 receives, from the user, selection of a work site for which the evaluation result is desired to be confirmed from among the plurality of work sites. The evaluation unit 16 reads data of the work machine 20 arranged at the selected work site G from the data storage unit 12. The evaluation unit 16 calculates an evaluation value for each work site on the basis of the read vehicle body data and state data of the work machine 20, and the read value for the secondary category of the work. The display control unit 17 displays the calculated evaluation value on the display. The display control unit 17 may list and display the information regarding the values for the secondary category for each predetermined period (for example, one day), for each operator, or for each group of operators.

[0039] For example, the evaluation unit 16 calculates an occurrence rate of the re-spotting, which is an inefficient work. Specifically, the evaluation unit 16 calculates a ratio of the number of aggregated data pieces related to the re-spotting to the number of aggregated data pieces related to the spotting in the time series data pieces regarding work having the secondary category read from the data storage unit 12. In addition, the evaluation unit 16 may calculate a ratio of the total time related to the re- spotting to the total time related to the spotting in the time series data pieces regarding work having the secondary category read from the data storage unit 12. The management device 10 displays the occurrence rate of the re-spotting to enable the site supervisor to recognize the technical level of the operator at the work site and to consider resetting or the like of the position of the work spot at the work site. In this case, the evaluation unit 16 may calculate an average forward traveling time, an average reverse traveling time, an average forward traveling distance, and an average reverse traveling distance related to the work in which the re-spotting has not occurred, and an average forward traveling time, an average reverse traveling time, an average forward traveling distance, and an average reverse traveling distance related to the work in which the re-spotting has occurred, and the display control unit 17 may list and display these values in a comparable manner. As a result, the site supervisor can recognize how much the work efficiency is lowered by the re-spotting.

[0040] For example, the evaluation unit 16 calculates a loss time due to the re-spotting. Specifically, the evaluation unit 16 extracts the work in which the re- spotting has not occurred for each cycle from the time series data pieces regarding work having the secondary category read from the data storage unit 12, and calculates the time taken for each cycle. In addition, the evaluation unit 16 extracts the work in which the re-spotting has occurred for each cycle from the time series data pieces regarding work having the secondary category read from the data storage unit 12, and calculates the time taken for each cycle. The display control unit 17 displays the time related to the work in which the re-spotting has not occurred and the time related to the work in which the re- spotting has occurred in a comparable manner. At this time, the evaluation unit 16 calculates, as the loss time, a difference between the average value of the times related to the work in which the re-spotting has not occurred and the time related to each work in which the re-spotting has occurred. Fig. 7 is an example of a histogram representing the loss time due to the re-spotting according to the first embodiment. For example, as illustrated in Fig. 7, the display control unit 17 displays, as a histogram, the time related to the work in which the re-spotting has not occurred and the time related to the work in which the re- spotting has occurred. As a result, the site supervisor can recognize how much the work efficiency is lowered by the re-spotting.

[0041] For example, the evaluation unit 16 according to another embodiment may calculate the loss time by a difference between a standard time related to the spotting work and a time actually taken for the spotting work. In this case, the evaluation unit 16 calculates the time taken for the spotting including the re-spotting for each work from the time series data pieces regarding work having the secondary category read from the data storage unit 12. The evaluation unit 16 displays a predetermined standard time related to the spotting work and a time taken for the spotting in a comparable manner. In this case, the evaluation unit 16 calculates the difference between the time taken for the spotting and the standard time as the loss time.

[0042] For example, the evaluation unit 16 calculates a loss production amount due to the re-spotting. Specifically, the evaluation unit 16 extracts the work in which the re-spotting has not occurred for each cycle from the time series data pieces regarding work having the secondary category read from the data storage unit 12, and calculates the average value of the per-unit-time processed cargo weights. In addition, the evaluation unit 16 extracts the work in which the re-spotting has occurred for each cycle from the time series data pieces regarding work having the secondary category read from the data storage unit 12, and calculates the average value of the per-unit- time processed cargo weights. Accordingly, the site supervisor can recognize how much loss occurs due to the re-spotting.

[0043] For example, the evaluation unit 16 calculates an occurrence rate of the re-spotting with respect to the presence or absence of queuing. Specifically, the evaluation unit 16 extracts the work in which the queuing has not occurred for each cycle from the time series data pieces regarding work having the secondary category read from the data storage unit 12, and calculates the ratio at which the re-spotting is included in the extracted cycles. In addition, the evaluation unit 16 extracts the work in which the queuing has occurred for each cycle from the time series data pieces regarding work having the secondary category read from the data storage unit 12, and calculates the ratio at which the re-spotting is included in the extracted cycles. The display control unit 17 lists and displays the probability of occurrence of the re-spotting when the queuing occurs and the probability of occurrence of the re-spotting when the queuing does not occur. By doing so, the site supervisor can examine the causal relationship between the queuing and the re-spotting.

[0044] For example, the evaluation unit 16 generates a Key Performance Indicator (KPI) on the basis of a value related to the secondary category. Examples of the KPI include the number of times of queuing, the average number of times of queuing per cycle, the frequency of queuing, the average time of queuing, the amount of fuel consumed by queuing, the average time of pre-spotting, the average distance of pre-spotting, the amount of fuel consumed by pre-spotting, the average time of spotting, the average distance of spotting, the amount of fuel consumed by spotting, the improvement rate of spotting, the number of times of re- spotting, the occurrence probability of re-spotting, the loading time, the number of times of loading, the pre- dumping time, the earth dumping time, and the post-dumping time.

[0045] For example, the evaluation unit 16 specifies a KPI correlated with the time required for spotting among a plurality of indices related to the operations of the work machine 20. Specifically, the evaluation unit 16 extracts time zones of the work which is read from the data storage unit 12 and whose secondary category is the spotting, and analyzes the correlation between the KPI value for each time zone and the time required for the spotting. The display control unit 17 displays the KPI having a large absolute value of correlation with the time required for the spotting.

[0046] <Other Embodiments> Although the embodiment has been described in detail with reference to the drawings, the specific configuration is not limited to the above-described configuration, and various design changes and the like can be made. That is, in other embodiments, the order of the above-described pieces of processing may be appropriately changed. In addition, some pieces of the processing may be executed in parallel. The management device 10 according to the above- described embodiment may be configured by a single computer, or the configuration of the management device 10 may be divided into a plurality of computers and the plurality of computers may function as the management device 10 in cooperation with each other. At this time, some computers constituting the management device 10 may be mounted in the computer 29 of the work machine 20. For example, in another embodiment, the computer 29 of the work machine 20 may estimate the primary category of the work content.

[0047] In the spotting work, the management device 10 according to the above-described embodiment estimates a portion where there is forward traveling more than <semantics>1 / 2<annotation encoding="application / x-tex">1 / 2< / annotation>< / semantics> of the vehicle body length of the work machine 20 as the re- spotting work, but the present disclosure is not limited thereto. For example, in another embodiment, in a case where any forward traveling occurs in the spotting work, the management device 10 may estimate the operation as the re-spotting.

[0048] The work machine 20 according to the above-described embodiment is a dump truck, but the present disclosure is not limited thereto. For example, the work machine 20 according to another embodiment may be another conveyance machine.

[0049] The work machine 20 according to the above-described embodiment moves to the work spot SP1 by backward traveling, but the present disclosure is not limited thereto. For example, in the work site G according to another embodiment, the work machine may move to the work spot SP1 by forward traveling. In this case, the redirection spot SP2 does not need to exist at the work site G. In this case, pre-spotting does not need to occur in a series of operations. In the embodiment described above, the work content estimation system 1 (display control system) includes the vehicle data acquisition unit 11 that acquires vehicle body information of the work machine 20, the estimation unit 14 that estimates a work content of the work machine 20 on the basis of the vehicle body information, and a display control unit 17 that generates a signal for displaying information regarding the work content of the work machine 20 estimated by the estimation unit 14. The work content includes spotting work which is a series of traveling states toward a loading spot in the loading site G1 or a series of traveling states toward an earth dumping spot in the earth dumping site G2. The estimation unit 14 estimates whether or not the work content of the work machine 20 is the spotting work on the basis of the vehicle body information. The display control unit 17 may generate a signal for displaying a time taken for the spotting work. The estimation unit 14 may estimate the work content for each group on the basis of vehicle body information of a plurality of work machines 20, and the display control unit 17 may generate a signal for listing and displaying information regarding the work content for each group. The work content estimation system 1 (display control system) may include a selection unit that receives selection of a work site, and the display control unit 17 may generate a signal for displaying information regarding the work content at the work site selected. The display control unit 17 may generate a signal for displaying information regarding the work content for each predetermined period. The display control unit 17 may generate a signal for displaying a loss in the spotting work. The loss may be calculated on the basis of a standard time related to the spotting work and a time actually taken for the spotting work. A display method for a work content includes a step of acquiring vehicle body information of the work machine 20, a step of estimating a work content of the work machine 20 on the basis of the vehicle body information, and a step of displaying information regarding the work content of the work machine 20 estimated. The work content includes spotting work which is a series of traveling states toward a loading spot in the loading site G1 or a series of traveling states toward an earth dumping spot in the earth dumping site G2. In the step of estimating, whether or not the work content of the work machine 20 is the spotting work is estimated on the basis of the vehicle body information. Reference Signs List

[0050] 1 Work content estimation system (display control system) 10 Management device 11 Vehicle body data acquisition unit (acquisition unit) 12 Data storage unit 13 State calculation unit 17 Display control unit 21 Vehicle body 22 Vessel 23 Lift cylinder 24 Dump operation detection sensor 25 Wheel 26 Suspension cylinder 27 Suspension pressure sensor 28 Positioning device 29 Computer G Work site G1 Loading site G2 Earth dumping site G3 Travel path SP1 Work spot SP2 Redirection spot SP3 Standby spot

Claims

1. A display control system for a work machine comprising: an acquisition unit that acquires vehicle body information of a work machine; an estimation unit that estimates a work content of the work machine on a basis of the vehicle body information; and a display control unit that generates a signal for displaying information regarding the work content of the work machine estimated by the estimation unit, wherein the work content includes spotting work which is a series of traveling states toward a loading spot in a loading site or a series of traveling states toward an earth dumping spot in an earth dumping site, and wherein the estimation unit estimates whether or not the work content of the work machine is the spotting work on a basis of the vehicle body information.

2. The display control system for a work machine according to claim 1, wherein the display control unit generates a signal for displaying a time taken for the spotting work.

3. The display control system for a work machine according to claim 1, wherein the estimation unit estimates the work content for each group on a basis of vehicle body information of a plurality of work machines, and wherein the display control unit generates a signal for listing and displaying information regarding the work content for each group.

4. The display control system for a work machine according to claim 1, comprising: a selection unit that receives selection of a work site, wherein the display control unit generates a signal for displaying information regarding the work content at the work site selected.

5. The display control system for a work machine according to claim 1, wherein the display control unit generates a signal for displaying information regarding the work content for each predetermined period.

6. The display control system for a work machine according to claim 1, wherein the display control unit generates a signal for displaying a loss in the spotting work.

7. The display control system for a work machine according to claim 6, wherein the loss is calculated on a basis of a standard time related to the spotting work and a time actually taken for the spotting work.

8. A display method for a work content comprising: a step of acquiring vehicle body information of a work machine; a step of estimating a work content of the work machine on a basis of the vehicle body information; and a step of displaying information regarding the work content of the work machine estimated, wherein the work content includes spotting work which is a series of traveling states toward a loading spot in a loading site or a series of traveling states toward an earth dumping spot in an earth dumping site, and wherein, in the step of estimating, whether or not the work content of the work machine is the spotting work is estimated on a basis of the vehicle body information.