Work management system and work management program

Abstract

This invention provides a work management system and work management program that can predict in advance when the remaining energy source will be insufficient, making it easier to change work procedures. [Solution] A work management system (10) for managing work performed by a work machine (20), comprising a visualization means (514) that visualizes the work content that the work machine (20) can perform before the remaining amount of energy source (201) becomes insufficient, based on the remaining amount of energy source (201) installed in the work machine (20) and the amount of energy source (201) consumed based on the work plan that the work machine (20) is scheduled to perform.

Description

Technical Field

[0001] The present invention relates to a work management system and a work management program.

Background Art

[0002] As background art in this technical field, for example, Patent Document 1 describes a "determination device that determines whether a scheduled operation can be executed by referring to the remaining battery level of a work vehicle, the work content, and the decreasing tendency of the battery in a specific operation."

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in Patent Document 1, after determining whether a scheduled operation can be executed, no information is presented to enable the administrator to review the work plan. For this reason, since the time from when the remaining battery level runs out until resuming work cannot be determined, there is a problem that the work time cannot be efficiently utilized.

[0005] The present invention has been made in view of the above actual situation, and its main object is to provide a work management system and a work management program that can predict in advance the timing when the remaining energy is insufficient and more easily change the work content.

Means for Solving the Problems

[0006] To achieve the above objective, a representative example of the present invention is a work management system for managing work performed by a work machine, characterized by comprising: a visualization means for visualizing the work content that the work machine can perform before the remaining amount of energy source installed in the work machine becomes insufficient, based on the remaining amount of energy source consumption based on the work plan that the work machine is scheduled to perform.

[0007] According to the present invention, it is possible to predict in advance when the energy level will become insufficient and to more easily change the work content. Furthermore, other problems, configurations, and effects will be clarified by the following description of the embodiments. [Brief explanation of the drawing]

[0008] [Figure 1] This is a block diagram illustrating the schematic configuration of a work management system according to the first embodiment of the present invention. [Figure 2] This is a side view of the crane. [Figure 3] Block diagram showing the configuration of the work management server. [Figure 4] This is a schematic diagram showing an example of 3D model data for cranes and buildings. [Figure 5] This is a schematic diagram of the movement path of materials as moved by a crane, illustrating an example of operating the crane with the simplest possible operation. [Figure 6] This is a schematic diagram of the movement path of materials when a crane moves them, illustrating an example of moving materials in a straight line while avoiding buildings. [Figure 7] This is a schematic diagram illustrating the movement path of materials when a crane moves them, showing an example of moving materials in an arc while avoiding buildings. [Figure 8] This is a schematic diagram of the movement path of materials as moved by a crane, illustrating an example of moving materials through the space between buildings. [Figure 9]This is a schematic diagram of the movement path of a crane moving materials, illustrating an example where the upper rotating body is rotated away from the building to move the materials. [Figure 10] This is a list of battery power consumption calculated by the power consumption calculation unit based on the work plan of the first embodiment. [Figure 11] This is a list of battery power consumption calculated by the power consumption calculation unit based on the work plan of the second embodiment. [Figure 12] This is an explanatory diagram showing a graph (A) that predicts the change in battery capacity in each work process of the first embodiment, and visualization information (B) that shows whether the battery capacity corresponding to graph (A) is in a state where work can be continued in each work process. [Figure 13] This is an explanatory diagram showing a graph (A) that predicts the changes in battery capacity during each work process in the second embodiment, and visualization information (B) that indicates whether the battery capacity corresponding to graph (A) is in a state where work can be continued during each work process. [Figure 14] This is a flowchart of the comparison and determination process and the visualization process according to the first embodiment. [Figure 15] This is an explanatory diagram showing a graph (A) that predicts the changes in battery capacity when a new work plan is proposed for a work management system according to a second embodiment of the present invention, and visualization information (B) that indicates whether the battery capacity corresponding to graph (A) is in a state where work can be continued in each work process. [Figure 16] This is an explanatory diagram showing a work management system according to a second modification of the second embodiment, illustrating visualization information (A) based on the work plan before changing to work content with lower power consumption, and visualization information (B) based on the new work plan after changing to work content with lower power consumption. [Modes for carrying out the invention]

[0009] [First Embodiment] [Electrical configuration of work management system 10] Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an outline of the electrical configuration of a work management system 10 according to the first embodiment of the present invention. As shown in FIG. 1, the work management system 10 includes a crane 20 (working machine) to be managed, a work management server 50, an information terminal 60, and an external power source 70.

[0010] The work management system 10 is provided, for example, in units of construction sites where buildings are constructed. Therefore, the number of cranes 20 changes according to the scale of the construction site. As illustrated in FIG. 1, a configuration including one crane 20 or a configuration including a plurality of cranes 20 may be adopted for one work management system 10. When one work management system 10 includes a plurality of cranes 20, the work management by the work management system 10 according to the present embodiment is performed in the same manner for all the cranes 20.

[0011] The work management server 50 is connected to the crane 20 through a communication network. The work management server 50 is realized, for example, by a PC (Personal Computer) or a workstation (computer). The communication network is composed of, for example, the Internet, a public line, a wired LAN, a wireless LAN, or a combination thereof. The work management server 50 can exchange data with the crane 20 and the information terminal 60.

[0012] The crane 20 includes a battery 201, a communication device 202, a display device 203, and a control device 205. The battery 201 is an energy source mounted on the crane 20 and supplies power to each part of the crane 20.

[0013] The control device 205 monitors the state of the battery 201 and detects the capacity (remaining amount) and the deterioration state of the battery 201. The deterioration state of the battery 201 is detected by monitoring, for example, the rate at which the capacity decreases when power is supplied to each part of the crane 21 or the time required to charge the battery 201.

[0014] The control device 205 controls the communication device 202 to transmit information on the capacity and degradation state of the battery 201 to the work management server 50. Further, the control device 205 receives visualization information transmitted from the work management server 50 via the communication device 202. The control device 205 controls the display device 203 to display the visualization information. Note that the visualization information created by the work management server 50 will be described later. Also, the information terminal 60 includes a communication device and a display device, similar to the crane 20, and can receive the visualization information transmitted from the work management server 50 via the communication device and display the visualization information on the display device.

[0015] The work management server 50 includes a communication device 501 and a control device 505. The communication device 501 receives information (such as the capacity and degradation state of the battery 201) transmitted from the crane 20 and transmits visualization information, which will be described later, to the crane 20 and the information terminal 60. The detailed configuration of the work management server 50 will be described later.

[0016] The control performed by each control device (including the control devices 205 and 505) of the work management system 10 is not limited to the above and may be performed by another device. For example, part of the control performed by the control device 205 of the crane 20 may be performed by the control device 505 of the work management server 50, or the control performed by the control device 505 of the work management server 50 may be performed by the control device 205 of the crane 20. For example, the determination of the degradation state of the battery 201 may be performed on the control device 505 side. Also, the control performed by the control devices 205 and 505 may be performed by the information terminal 60 or a device provided separately from the crane 20 and the work management server 50.

[0017] The external power supply 70 can supply power to the crane 20. The crane 20 is connected to a power connection section 204 installed on the crane body (for example, the lower traveling body 101) via a power cable 75 extending from the external power supply 70. Power supplied from the external power supply 70 is supplied to various parts of the crane 20 and also charges the battery 201. The location of the power connection section 204 is not limited to the above, and the power connection section 204 may be installed on other parts of the crane 20.

[0018] [Configuration of Crane 20] The configuration of the crane 20 will be described below with reference to Figure 2. Figure 2 is a side view showing the external appearance of the crane 20. The crane 20 has a lower traveling body 101, an upper slewing body 103 that is rotatably mounted on the lower traveling body 101 via a slewing wheel, a tower boom 104 (hereinafter abbreviated as tower 104), which is a front member whose base end is rotatably pivoted on the upper slewing body 103, and a jib 108, which is a front member rotatably pivoted on the tip of the tower 104. The lower traveling body 101 has crawlers, and the crane 20 is a crawler crane. A driver's cab 107 is provided at the front of the upper slewing body 103, and a counterweight 109 is attached to the rear of the upper slewing body 103. The driver's cab 107 is equipped with operating levers (not shown) for performing various operations, a communication device 202, and a display device 203 (see Figure 1), etc.

[0019] The upper rotating body 103 is equipped with a hook hoisting drum 105 for hoisting the hook, a tower luffing drum 106 for luffing the tower, a jib luffing drum 102 for luffing the jib, and a battery 201.

[0020] The lower traveling body 101 is driven by the driving force of a travel hydraulic motor. The upper slewing body 103 is driven to slewing by a slewing hydraulic motor via a slewing wheel. The hook hoisting drum 105 is driven by a hoisting hydraulic motor, the tower luffing drum 106 is driven by a tower luffing hydraulic motor, and the jib luffing drum 102 is driven by a jib luffing hydraulic motor. These hydraulic actuators (travel hydraulic motor, slewing hydraulic motor, hoisting hydraulic motor, tower luffing hydraulic motor, jib luffing hydraulic motor) are powered by a battery 201, and operate by power supplied from the battery 201. More specifically, an electric motor driven by power supplied from the battery 201 rotates a hydraulic pump. As the hydraulic pump rotates, the hydraulic fluid stored in the hydraulic fluid tank is pumped towards the hydraulic actuators. This causes each hydraulic actuator to operate.

[0021] The configuration for rotating the hook hoisting drum 105, tower luffing drum 106, and jib luffing drum 102 is not limited to the examples described above. For example, the hook hoisting drum 105, tower luffing drum 106, and jib luffing drum 102 may be electric winches that rotate directly or via a reduction gear or the like by the driving force of an electric motor.

[0022] A hoisting rope 151 is wound around the hook hoisting drum 105, and the hoisting rope 151 is connected to the hook 110 via the top of the tower 104 and the tip of the jib 108. When the hook hoisting drum 105 is driven, the hoisting rope 151 is wound in or unwound, causing the hook 110 to rise or fall.

[0023] One end of a tower pendant rope 161 is connected to the top of the tower 104, and the other end of the tower pendant rope 161 is connected to the tower upper spreader 162. The tower luffing rope 163 is routed multiple times between the tower upper spreader 162 and the tower lower spreader 165, passing over the top of the mast 164, and is wound around the tower luffing drum 106. When the tower luffing drum 106 is driven, the tower luffing rope 163 is wound in or unwound, changing the distance between the tower lower spreader 165 and the tower upper spreader 162, causing the tower 104 to luff.

[0024] A tower strut 140 is pivotally supported at the tip of the tower 104. The tower strut 140 is formed in a triangular shape by a front strut 140a, a rear strut 140b, and a connecting rod 140c that connects the front strut 140a and the rear strut 140b.

[0025] One apex of the tower strut 140, namely the tip of the front strut 140a, is connected to the tip of the jib 108 by a jib pendant rope 141. The other apex of the tower strut 140, namely the tip of the rear strut 140b, is connected to the jib luffing rope 143 via a tower strut pendant rope 142 and a jib upper spreader 144. The jib luffing rope 143 is wrapped multiple times between the jib upper spreader 144 and the jib lower spreader 145 and wound around the jib luffing drum 102. When the jib luffing drum 102 is driven, the jib luffing rope 143 is wound in or out, causing the tower strut 140 to rotate in the front-rear direction, thereby luffing the jib 108.

[0026] A pair of tower backstops 146 are provided on the left and right sides between the main frame 103a of the upper rotating body 103 and the tower 104. The tower backstops 146 limit the range of rotation of the tower 104 so that it does not rotate beyond its maximum angle. Typically, the maximum upright angle of the tower 104 is approximately 90 degrees.

[0027] [Configuration of the work management server 50] The detailed configuration of the work management server 50 will be described with reference to Figure 3. Figure 3 is a block diagram showing the electrical configuration of the work management server 50. The work management server 50 includes a communication device 501, a storage device 502, a display device 503, and a control device 505.

[0028] The control device 505 includes an arithmetic processing unit with a CPU and peripheral circuits. The storage device 502 can be any device capable of storing data non-volatilely, and is not limited to types such as HDD (Hard Disk Drive) or SSD (Solid State Drive). The storage device 502 stores the control program for the control device 505 and a database of work plans, which will be described later.

[0029] The control device 505 controls each part of the work management server 50 by reading and executing a control program (work management program) that is pre-stored in the storage device 502. The control device 505 includes an information acquisition unit 511, a power consumption calculation unit 512, a comparison and determination unit 513 (comparison and determination means), and a visualization unit 514 (visualization means).

[0030] The communication device 501 transmits and receives data with the crane 20 and the information terminal 60 via the network. The information acquisition unit 511 acquires information on the capacity and degradation status of the battery 201 transmitted from the crane 20 and received by the communication device 501.

[0031] The power consumption calculation unit 512 calculates the power consumption (consumption) of the battery 201 based on the work plan that the crane 20 is scheduled to perform. The comparison and determination unit 513 compares the capacity of the battery 201 installed in the crane 20 with the power consumption of the battery 201 based on the work plan that the crane 20 is scheduled to perform, and determines whether or not the capacity of the battery 201 is insufficient.

[0032] The visualization unit 514 creates visualization information showing the work that the crane 20 can perform before the battery 201's capacity becomes insufficient, based on the comparison and determination result between the battery 201's capacity and the battery 201's power consumption, as determined by the comparison and determination unit 513. The crane 20's work plan, the calculation of the battery 201's power consumption, the comparison and determination of the battery 201's capacity and power consumption, and the visualization information will be described later.

[0033] [Work plan for crane 20] The work plan to be executed by crane 20 is created, for example, using BIM (Building Information Modeling) and stored in the storage device 502. BIM is a database that associates 3D model data of crane 20 and the building (see Figures 4 to 9) with material information such as the weight and dimensions of the materials (work objects) that make up the building. In BIM, the movement path of crane 20 to move materials and the amount of movement of each actuator in relation to the movement path are simulated for each work process in the work plan.

[0034] Figures 4 to 9 are schematic diagrams of 3D model data for the crane 20 and the building 30. When creating a work plan using BIM, the operator operates these 3D model data on the display screen to perform simulations and set the movement path of the materials 40 by the crane 20. In this specification, "operator" refers to the manager who manages the work plan for the crane 20, or a creator who creates the work plan separately from the manager.

[0035] As shown in Figure 4, when the crane 20 performs the process of moving material 40, a work start point S is set where the hoisting rope 151 to which the material 40 is attached is hoisted up, a work intermediate point R is set where the hoisting rope 151 is lowered to lower the material 40, and a work end point E is set where the process is completed. In the example shown in Figure 4, the work end point E is also the work start point S for the next process, and the work start point S and work end point E are set at the same location. In addition, the work intermediate point R may also become the work end point E. In this case, at the work intermediate point R where the material 40 is lowered, another piece of material 40 is attached to the hook 110 to start the work.

[0036] Furthermore, in the example shown in Figure 4, there is a building 30 between the work start point S and the work intermediate point R. Therefore, the crane 20 must rotate the upper slewing body 103 and raise and lower the jib 108 to transport the materials 40 in order to avoid this building 30 (obstacle). The central axis CL indicates the center around which the upper slewing body 103 rotates. Note that the buildings 30 and 35 shown in the examples in Figures 4 to 9 may be buildings under construction that are the target of the crane 20's work, or they may be buildings constructed within the work space regardless of whether they are the target of the crane 20's work.

[0037] Figures 5 to 9 schematically show the movement path of the crane 20 as it moves the materials 40. In order to avoid complexity, only the hook 110 and a portion of the hoisting rope 151 of the crane 20 are shown in Figures 5 to 9, with other parts omitted.

[0038] Figure 5 shows an example of operating the crane 20 with the simplest operation when moving materials 40 from the work start point S to the work intermediate point R while avoiding the building 30. In the example shown in Figure 5, the materials 40 are moved from the work start point S to the work intermediate point R in the order of movement paths TR11, TR12, and TR13. First, in movement path TR11, the hoisting rope 151 to which the materials 40 are attached to the hook 110 is hoisted up at the work start point S. In movement path TR11, the crane 20 moves the materials 40 to a position higher than the top of the building 30.

[0039] Next, in the movement path TR12, the upper slewing body 103 is rotated to move the material 40 horizontally. This causes the material 40 to pass over the building 30 and approach the work relay point R. In the movement path TR12, the upper slewing body 103 rotates to the right around the central axis CL (meaning the upper slewing body 103 rotates in the direction that the hook 110 moves to the right as viewed from the worker in the driver's cab 107). Then, in the movement path TR13, the hoisting rope 151 is lowered to lower the material 40 to the work relay point R.

[0040] Figure 6 shows an example where there is a larger building 35 (obstacle) located close to building 30, and the materials 40 are moved linearly from the work start point S to the work intermediate point R while avoiding both building 30 and building 35. In the example shown in Figure 6, the materials 40 are moved from the work start point S to the work intermediate point R in the order of movement paths TR21, TR22, TR23, and TR24. First, in movement path TR21, the hoisting rope 151 with the materials 40 attached to the hook 110 is hoisted up at the work start point S. In movement path TR21, the crane 20 moves the materials 40 to a position higher than the top of building 30.

[0041] Next, in the movement path TR22, the upper slewing body 103 is rotated to move the material 40 horizontally, while the jib 108 is rotated in a direction that increases its elevation, and the hoisting rope 151 is lowered. In this movement path TR22, the rotation of the upper slewing body 103 causes the material 40 to pass over the building 30, and at the same time, the elevation of the jib 108 is increased, reducing the rotation radius. As a result, the material 40 can move while avoiding the building 35 (passing on the side of the crane 20 that is closer to the building 35). Furthermore, as the elevation of the jib 108 is increased and the tip of the jib 108 rises, the hoisting rope 151 is lowered by the same amount, maintaining the height of the material 40. As a result of the above, in the movement path TR22, the height of the material 40 is maintained, and the material 40 moves straight horizontally.

[0042] Next, in the movement path TR23, the upper slewing body 103 is rotated to move the material 40 horizontally, while the jib 108 is rotated in the direction of lowering its elevation, and the hoisting rope 151 is also reeled in. This returns the elevation angle of the jib 108 to its original position, allowing the material 40 to pass over the building 30 and approach the work relay point R. Furthermore, as the elevation of the jib 108 is lowered and the tip of the jib 108 descends, the hook 110 is simultaneously reeled in by the same amount to maintain the height of the material 40. As a result, in the movement path TR23, the height of the material 40 is maintained, and the material 40 is moved straight horizontally. In the example shown in Figure 6, in movement paths TR22 and TR23, the upper slewing body 103 rotates to the right around the central axis CL. Then, in movement path TR24, the hook 110 is reeled in to lower the material 40 to the work relay point R.

[0043] In the movement paths TR11 to TR13 shown in Figure 5, the horizontal movement of the material 40 is achieved solely by the rotation of the upper slewing body 103. However, in the movement paths TR21 to TR24 shown in Figure 6, the horizontal movement of the material 40 involves the rotation of the upper slewing body 103, the raising and lowering of the jib 108, and the lowering and raising of the hook 110. Therefore, moving the same material 40 along movement paths TR21 to TR24 consumes more power from the crane 20's battery 201 than moving the same material 40 along movement paths TR11 to TR13.

[0044] Figure 7 shows an example similar to the example in Figure 6, where there is a larger building 35 located close to building 30, and the materials 40 are moved from the work start point S to the work intermediate point R while avoiding both building 30 and building 35. In the example shown in Figure 7, the height of the materials 40 is changed in a parabolic manner to avoid building 30.

[0045] In the example shown in Figure 7, the material 40 is moved from the work start point S to the work intermediate point R in the order of movement paths TR31, TR32, TR33, and TR34. First, in movement path TR31, the hoisting rope 151 with the material 40 attached to the hook 110 is hoisted up at the work start point S. As the material 40 is moved in an arc in movement paths TR32 and TR33, which will be described later, in movement path TR31, the crane 20 moves the material 40 to a position lower than the top of the building 30.

[0046] Next, in the movement path TR32, the upper slewing body 103 is rotated to move the material 40 horizontally, while the jib 108 is rotated in a direction that increases its elevation, and the hoisting rope 151 is lowered. In this movement path TR32, the rotation of the upper slewing body 103 causes the material 40 to pass over the building 30, and at the same time, the elevation of the jib 108 is increased, reducing the rotation radius. This allows the material 40 to move while avoiding the building 35 (passing a position closer to the crane 20 than the building 35). Furthermore, as the elevation of the jib 108 is increased, the material 40 moves upward by the amount that the tip of the jib 108 rises. In addition, in the movement path TR32, the hoisting rope 151 is lowered at the same time to control the height of the material 40 so that it does not go too high. As a result of the above, in the movement path TR32, the material 40 is moved horizontally while its height is raised in an arc.

[0047] Next, in the movement path TR33, the upper rotating body 103 is rotated to move the material 40 horizontally, while the jib 108 is rotated in a direction that lowers the elevation of the jib 108, and the hoisting rope 151 is also wound up. This returns the elevation angle of the jib 108 to its original position, allowing the material 40 to pass over the building 30 and approach the work relay point R. Furthermore, as the elevation of the jib 108 is lowered and the tip of the jib 108 descends, the material 40 moves downward by the same amount. In addition, in the movement path 33, the hoisting rope 151 is simultaneously wound up to control the material 40 from going too far down (to prevent it from getting too close to the building 30). As a result of the above, in the movement path T33, the height of the material 40 is lowered in a parabolic shape while the material 40 is moved horizontally. In the example shown in Figure 7, the upper rotating body 103 rotates to the right around the central axis CL during travel paths TR32 and TR33. Then, during travel path TR34, the hook 110 is lowered to lower the material 40 to the work relay point R.

[0048] In the movement paths TR31 to TR34 shown in Figure 7, similar to the movement paths TR21 to TR24 shown in Figure 6, the upper slewing body 103 is rotated, the jib 108 is raised and lowered, and the hoisting rope 151 is lowered and raised during the horizontal movement of the material 40. For this reason, moving the same material 40 along the movement paths TR31 to TR34 shown in Figure 7 consumes more power from the battery 201 of the crane 20 than moving the same material 40 along the movement paths TR11 to TR13 shown in Figure 5.

[0049] On the other hand, in the movement path TR31~TR34 shown in Figure 7, the material 40 is moved in an arc, so the material 40 can be moved over a shorter distance than in the movement path TR21~TR24 shown in Figure 6. Therefore, moving the same material 40 in the crane 20 using the movement path TR31~TR34 shown in Figure 7 consumes less power from the battery 201 than moving the same material 40 using the movement path TR21~TR24 shown in Figure 6. In other words, when moving the same material 40 with the crane 20, the power consumption of the battery 201 is smallest in the order of movement path TR11~TR13, movement path TR21~TR24, and movement path TR31~TR34.

[0050] Figure 8 shows an example where a larger building 35 is located adjacent to building 30, and materials 40 are moved from the work start point S to the work intermediate point R, passing between buildings 30 and 35. In Figures 6 and 7, the materials 40 are shown passing at a position higher than the top of building 30, but in the example shown in Figure 8, the crane 20 passes the materials 40 at a position lower than the tops of buildings 30 and 35, while also avoiding buildings 30 and 35.

[0051] In the example shown in Figure 8, the material 40 is moved from the work start point S to the work intermediate point R in the order of movement paths TR41, TR42, TR43, and TR44. First, in movement path TR41, the hoisting rope 151 attached to the hook 110 is hoisted up at the work start point S. In order for the material 40 to pass at a position lower than the top of the buildings 30 and 35, the crane 20 moves the material 40 to a position lower than the top of the building 30.

[0052] Next, in the movement path TR42, the upper slewing body 103 is rotated to move the material 40 horizontally, while the jib 108 is rotated in a direction that increases the elevation of the jib 108, and the hoisting rope 151 is lowered. In this movement path TR42, the rotation of the upper slewing body 103 moves the material 40 horizontally, and at the same time, the elevation of the jib 108 is increased, reducing the rotation radius. By reducing the rotation radius of the jib 108, the material 40 can be moved in a straight line when viewed from above over the buildings 30 and 35. Therefore, the material 40 can move through the space between the buildings 30 and 35. In addition, in the movement path TR42, the material 40 may be moved while maintaining its height, as shown in the example in Figure 6, or the height of the material 40 may be increased in a parabolic shape as it moves, as shown in the example in Figure 7.

[0053] Next, in the movement path TR43, the upper slewing body 103 is rotated to move the material 40 horizontally, while the jib 108 is rotated in a direction that lowers the elevation of the jib 108, and the hoisting rope 151 is also wound up. In this movement path TR42, the rotation of the upper slewing body 103 moves the material 40 horizontally, and at the same time, the elevation of the jib 108 is lowered, increasing the rotation radius. By increasing the rotation radius of the jib 108 (returning it to its pre-rotation state), the material 40 can be moved in a straight line when viewed from above between the buildings 30 and 35. Therefore, the material 40 can move through the space between the buildings 30 and 35. Note that in the movement path TR43, the material 40 may be moved while maintaining its height, as shown in the example in Figure 6, or the material 40 may be moved while its height is lowered in a parabolic curve, as shown in the example in Figure 7. In the example shown in Figure 8, the upper rotating body 103 rotates to the right around the central axis CL in travel paths TR42 and TR43. Then, in travel path TR44, the hoisting rope 151 is lowered to lower the material 40 to the work relay point R.

[0054] In the movement path TR41-TR44 shown in Figure 8, since the materials 40 are moved at a lower position than the building 30, the materials 40 can be moved along the shortest distance in the movement path from the work start point S to the work intermediate point R. For this reason, moving the same materials 40 along the movement path TR41-TR44 shown in Figure 8 results in the lowest power consumption of the battery 201 for the crane 20 compared to moving the materials 40 along the movement path TR11-TR13 shown in Figure 5, the movement path TR21-TR24 shown in Figure 6, and the movement path TR31-TR34 shown in Figure 7. In other words, as shown in Figures 6-8, when the buildings 30 and 35 are in close proximity, moving the materials 40 along the movement path TR41-TR44 shown in Figure 8 results in the lowest power consumption of the battery 201.

[0055] Furthermore, when moving materials 40 along the movement path TR41 to TR44 shown in Figure 8, collision prevention measures such as covering materials 40 with cushioning material will be necessary to ensure safe passage between buildings 30 and 35.

[0056] Figure 9 shows a larger building 35 located close to building 30, with the upper rotating body 103 rotating in a direction away from both buildings 30 and 35. While Figures 6 and 7 show examples of passing over building 30, and Figure 8 shows an example of passing between buildings 30 and 35, in the example shown in Figure 9, the upper rotating body 103 rotates in a direction away from both buildings 30 and 35, and the material 40 is moved at a rotation angle greater than 180°.

[0057] In the example shown in Figure 9, the material 40 is moved from the work start point S to the work intermediate point R in the order of movement paths TR51, TR52, and TR53. First, in movement path TR51, the hoisting rope 151 attached to the hook 110 is hoisted up at the work start point S. In movement path TR51, the crane 20 moves the material 40 to a height lower than the top of the building 30, and at a height where the material 40 is lifted off the ground.

[0058] Next, in the movement path TR52, the upper slewing body 103 is rotated away from buildings 30 and 35, and the material 40 is moved horizontally at a rotation angle greater than 180°. As a result, the material 40 moves away from buildings 30 and 35 and then approaches the work relay point R. In the movement path TR52, the upper slewing body 103 rotates to the left around the central axis CL (meaning the upper slewing body 103 rotates in the direction that the hook 110 moves to the left as viewed from the operator in the cab 107). Then, in the movement path TR53, the hoisting rope 151 is lowered to lower the material 40 to the work relay point R.

[0059] In the movement paths TR51 to TR53 shown in Figure 9, the horizontal movement of the material 40 is performed solely by the rotation of the upper slewing body 103. Therefore, compared to the movement paths TR21 to TR24 shown in Figure 6, the power consumption of the battery 201 is lower because there is no luffing of the jib 108 and no lowering or raising of the hoisting rope 151 during the horizontal movement of the material 40.

[0060] Furthermore, when moving the material 40 along the movement paths TR51 to TR53 shown in Figure 9, a wider workspace is required than when moving the material 40 along other movement paths, because the upper rotating body 103 is rotated at a rotation angle greater than 180°.

[0061] As described above, the operator sets the movement path of the materials 40 by the crane 20 and creates a work plan based on a simulation using 3D model data.

[0062] [Calculation of power consumption based on the work plan of the first embodiment] The power consumption calculation unit 512 calculates the power consumption of the battery 201 using the work plan created in BIM. More specifically, it calculates the power consumption expected from the amount of operation of the hydraulic actuator (hydraulic motor) and the material information in each work process of the work plan.

[0063] Figure 10 is a table showing the power consumption of the battery 201 calculated by the power consumption calculation unit 512 based on the work plan of the first embodiment created using BIM. The work plan of the first embodiment shown in Figure 10 includes work processes numbered A1 to H1.

[0064] In the first embodiment, for each work process A1 to H1, the operator inputs material information (dimensions, weight, etc.) for each material A to H, the coordinates of the work machine, the coordinates of the work start point, the coordinates of the work end point, etc. Note that materials A to H in Figures 10 and 11 correspond to material 40 as described in the 3D model data simulation above. Furthermore, the coordinates of the work machine indicate the position of the central axis CL of the upper slewing body 103 on the crane 20.

[0065] Furthermore, among materials A to H, material D is shown to be composed of multiple materials D-1 and D-2. Also, work process F1 shows the process in which the crane 20 moves by the movement of the lower traveling body 101. In this case, the coordinates of the work start point, work end point, etc. are not entered, and only the amount of travel is entered. Note that in Figures 10 and 11, each coordinate is entered as, for example, latitude and longitude values.

[0066] Work processes A1-E1, G1,H1 are work processes in which materials A-E, G, and H are moved by the crane 20. In the first embodiment, for each work process A1-E1, G1,H1, the 3D model data described above is simulated using material information (dimensions, weight, etc.) of each material A-E, G, H, work machine coordinates, work start point coordinates, work end point coordinates, etc., and the movement paths of materials A-E, G, H by the crane 20 are set. Based on each movement path set in the work plan, the hoisting distance (m), hoisting distance (m), luffing angle (°), luffing angle (°), right rotation angle (°), and left rotation angle (°) are calculated.

[0067] Furthermore, the hoisting and lowering distances indicate the amount of movement by which the hook 110 moves up and down due to the drive of the hoisting hydraulic motor. The luffing angle and luffing angle are the amount of change in angle when the luffing of the jib 108 is raised and lowered due to the drive of the jib luffing hydraulic motor. The right slewing angle and left slewing angle are the slewing angles of the upper slewing body 103 due to the slewing hydraulic motor. The power consumption calculation unit 512 calculates the operating amount of the hoisting hydraulic motor from the hoisting and lowering distances, the operating amount of the jib luffing hydraulic motor from the luffing angle and luffing angle, and the operating amount of the slewing hydraulic motor from the right slewing angle and left slewing angle.

[0068] Furthermore, since work process F1 is the process in which the crane 20 moves due to the movement of the lower traveling body 101, the power consumption calculation unit 512 calculates the amount of operation of the hydraulic motor for travel. In the work plan of the first embodiment shown in Figure 10, work process F1 is the process in which the crane 20 moves due to the movement of the lower traveling body 101, and following work process F1, work process G1 is the process of moving the material G from the work start point to the work intermediate point.

[0069] Based on the above information, the power consumption calculation unit 512 analyzes the amount of operation of each hydraulic actuator and the load when each hydraulic actuator operates in each work process A1 to H1 for the work plan of the first embodiment and calculates the power consumption. For each work process A1 to H1, the work time and power consumption are shown. For example, in work process A1, the work time is 1 hour and the power consumption is 100 kWh, so the power consumption is 1 × 100 = 100 kW.

[0070] [Calculation of power consumption based on the work plan of the second embodiment] Figure 11 is a table showing the power consumption of the battery 201 calculated by the power consumption calculation unit 512 based on the work plan of the second embodiment created using BIM. The work plan of the second embodiment shown in Figure 11 includes work processes numbered A2 to H2.

[0071] In the work plan of the second embodiment, similar to the work plan of the first embodiment described above, the operator inputs material information (dimensions, weight, etc.) for each material A to H, the coordinates of the work machine (coordinates indicating the position of the crane 20), the coordinates of the work start point, the coordinates of the work end point, etc., for each work process A2 to H2.

[0072] In the work plan of the second embodiment, similar to the work plan of the first embodiment, for each work process A2 to H2, the 3D model data described above is simulated using the material information (dimensions, weight, etc.) of each material A to H, the coordinates of the work machine, the coordinates of the work start point, the coordinates of the work end point, etc., and the movement paths of materials A to H by the crane 20 are set. Based on each movement path set in the work plan, the hoisting distance, hoisting distance, luffing angle, luffing angle, right rotation angle, and left rotation angle are calculated.

[0073] Based on the above information, the power consumption calculation unit 512 analyzes the amount of operation of each hydraulic actuator and the load when each hydraulic actuator operates in each work process A2 to H2 for the work plan of the second embodiment and calculates the power consumption. In this second embodiment, the load in work process A2 is large, and the capacity of the battery 201 is insufficient. In work process A2 in Figure 11, the work time is 1 hour and the power consumption is 2500 kWh, so the power consumption is 1 × 2500 = 2500 kW.

[0074] [Comparison and determination of the battery capacity and power consumption by the comparison and determination unit 513] As described above, the comparison and determination unit 513 compares the capacity (remaining capacity) of the battery 201 mounted on the crane 20 with the amount of battery 201 consumed based on the work plan that the crane 20 is scheduled to perform, and determines whether or not the battery 201 is insufficient. More specifically, the comparison and determination unit 513 predicts the change in the capacity of the battery 201 according to the power consumption based on the work plan that the crane 20 is scheduled to perform, and compares and determines the capacity of the battery 201 and the power consumption for each work process. In this embodiment, each work process A1 to H1 in the first embodiment and work processes A2 to H2 in the second embodiment are set to have a work time of 1 hour (see Figures 10 and 11). For example, the comparison and determination unit 513 predicts the change in the capacity of the battery 201 every 15 minutes. Note that the interval at which the comparison and determination unit 513 performs the comparison is not limited to this, and any predetermined time shorter than each work process is acceptable.

[0075] Furthermore, in this embodiment, the work plan is executed while power is supplied to the crane 20 from the external power supply 70 and the mounted battery 201. Therefore, the comparison and determination unit 513 calculates the amount of external power that can be supplied to the crane 20 and the battery 201 from the external power supply 70 when the work plan is executed, and compares and determines the amount obtained by adding the amount of external power to the capacity of the battery 201 with the power consumption of the battery 201 as described above.

[0076] [Creation of visualization information by the visualization unit 514] As described above, the visualization unit 514 creates visualization information that shows the work that the crane 20 can perform before the battery 201's capacity becomes insufficient, based on the comparison and determination result between the battery 201's capacity and the battery 201's power consumption, as determined by the comparison and determination unit 513.

[0077] Figures 12(B) and 13(B) are examples of visualization information created by the visualization unit 514, and are created using the work plan information of the first and second embodiments shown in Figures 10 and 11, and information on the capacity and degradation state of the battery 201 mounted on the crane 20. More specifically, Figure 12(A) is a graph (shown by a solid line) that predicts the change in the capacity of the battery 201 in each work process A1 to H1 of the first embodiment, and Figure 12(B) is visualization information that shows whether the capacity of the battery 201 corresponding to Figure 12(A) is in a state where work can be continued (a state in which the next work process can be executed) in each work process A1 to H1.

[0078] Furthermore, Figure 13(A) is a graph (shown by a solid line) predicting the change in the capacity of the battery 201 during each work process A2 to H2 of the second embodiment, and Figure 13(B) is visualization information indicating whether the capacity of the battery 201 corresponding to Figure 13(A) is in a state where work can be continued during each work process A2 to H2.

[0079] In this embodiment, as described above, the comparison and determination unit 513 calculates the amount of external power that can be supplied from the external power source 70 to the crane 20 and the battery 201 when the work plan is executed, and compares the amount obtained by adding the amount of external power to the capacity of the battery 201 with the power consumption of the battery 201 as described above. For this reason, the capacity of the battery 201 shown in Figures 12(A) and 13(A) includes the amount of external power supplied from the external power source 70.

[0080] The graph in Figure 12(A) shows that power is supplied to the battery 201 from the external power supply 70 so that the battery 201's capacity reaches 100% at the start time (8:00) of each work process A1 to H1 in the work plan of the first embodiment. Based on the power consumption of the battery 201 calculated by the power consumption calculation unit 512 described above, the graph shows how the capacity of the battery 201 changes sequentially from the start time through work processes A1 to D1, through the lunch break, and then through work processes E1 to H1 until the end of the workday (17:00).

[0081] The graph shown in Figure 12(A) shows the capacity of the battery 201 calculated every 15 minutes, a predetermined time interval, based on the comparison and determination unit 513's prediction of the changes in the battery 201's capacity according to the power consumption based on the work plan of the first embodiment. During the lunch break (12:00 to 13:00), the power consumption of the battery 201 is 0, so the capacity of the battery 201 increases compared to the power supplied from the external power supply 70. The graph shown in Figure 12(A) shows that the battery 201's capacity does not become insufficient (the capacity does not approach 0) because the power consumption in each work process A1 to H1 is low.

[0082] Figure 12(B) is visualization information that visualizes the work processes A1 to H1 that the crane 20 can execute before the battery 201 becomes depleted, based on the comparison judgment result obtained by the comparison judgment unit 513 described above by comparing the amount obtained by adding the external power supply from the external power source 70 to the capacity of the battery 201 with the power consumption of the battery 201. More specifically, the rectangle FL representing each work process A1 to H1 is shown using either cross-hatching, diagonal hatching, or dot hatching. In this specification, for illustrative purposes, the type of hatching represents the state of the battery 201's capacity and whether the next work process can be executed, but it is not limited to this, and it is sufficient as long as the differences in each state can be represented, for example, by different types of colors.

[0083] Cross-hatching indicates that there is no shortage of battery capacity in the 201 and the next work process can be performed. Diagonal hatching indicates that there is no shortage of battery capacity in the 201 and the next work process can be performed, and furthermore, it can be performed using only the external power supplied from the external power supply 70 to the battery 201. Dot hatching indicates that a state of insufficient capacity in the battery 201 occurs and the next process cannot be performed. As mentioned above, in the first embodiment, since the power consumption in each work process A1 to H1 is small, the battery 201 does not become insufficient in capacity, so dot hatching is not used in Figure 12(B).

[0084] Each work process A1 to H1 shown in Figure 12(B) is indicated by cross-hatching or diagonal hatching. Therefore, the work plan of the first embodiment, consisting of these work processes A1 to H1, does not result in a shortage of battery capacity 201, and all work processes A1 to H1 can be executed.

[0085] As shown in Figure 13(A), in the second embodiment, as in the case of the work plan of the first embodiment shown in Figure 12(A), power is supplied to the battery 201 from the external power supply 70 so that the capacity of the battery 201 reaches 100% at the start time (8:00) of each work process A2 to H2. Based on the power consumption of the battery 201 calculated by the power consumption calculation unit 512 described above, the capacity of the battery 201 changes sequentially from the start time to work processes A2 to D2, through the lunch break, and then to work processes E2 to H2 until the end time (17:00).

[0086] The graph shown in Figure 13(A) shows the capacity of the battery 201 calculated every 15 minutes, a predetermined time interval, based on the comparison and determination unit 513's prediction of the changes in the battery 201's capacity according to the power consumption based on the work plan of the second embodiment. During the lunch break (12:00 to 13:00), the power consumption of the battery 201 is 0, so the capacity of the battery 201 increases compared to the power supplied from the external power supply 70. In the graph shown in Figure 13(A), a state occurs where the capacity of the battery 201 becomes insufficient due to the high power consumption in work process A2.

[0087] Figure 13(B) is visualization information that visualizes the work processes A2 to H2 in the work plan that the crane 20 can execute before the battery 201 becomes depleted, based on the comparison judgment result obtained by the comparison judgment unit 513 described above by comparing the amount obtained by adding the amount of external power supplied from the external power source 70 to the capacity of the battery 201 with the power consumption of the battery 201. In Figure 13(B), the hatching type that indicates the state of the battery 201's capacity and whether the next work process can be executed is the same as shown in Figure 12(B), and the rectangle FL representing each work process A2 to H2 is shown using either cross hatching, diagonal hatching, or dot hatching.

[0088] In Figure 13(B), work processes A2 to C2 are indicated by dot hatching. As described above, in the second embodiment, the power consumption in work process A2 is high, resulting in insufficient capacity of the battery 201 during work processes A2 to C2, which means that the following work processes B2 to D2 cannot be performed. In the second embodiment, since work processes B2 to D2 cannot be performed, the power consumption of the battery 201 is 0 during work processes B2 to D2.

[0089] Furthermore, work process D2 shown in Figure 13(B) is indicated by diagonal hatching. Work process D2 does not result in a battery capacity shortage of 201, making the next work process E2 possible, and furthermore, it is possible to perform it using only the external power supplied from the external power source 70 to 201. In other words, the recovery time (9:00 to 11:00) from the time when the battery capacity of 201 becomes insufficient in work process A2 until work process D2, when the crane 20 becomes operational, is visualized.

[0090] Furthermore, the following work steps E2-H2 are shown with cross-hatching. Work steps E2-H2 indicate that because the power consumption of battery 201 is low, there is no shortage of battery capacity, and the next work step can be performed.

[0091] [Effects of the First Embodiment] Next, with reference to Figure 14, the comparison judgment process and visualization process in the work management server 50 will be explained. Figure 14 is a flowchart showing the processing content of the work management server 50.

[0092] First, in the work management server 50, before executing the work plan, for example, before the start of work on the day the work plan is to be executed, the information acquisition unit 511 performs an information acquisition process to acquire information on the capacity and degradation status of the battery 201 transmitted from the crane 20 (S1). Next, after the information acquisition process, the power consumption calculation unit 512 performs a power consumption calculation process to calculate the power consumption of the battery 201 using the work plan created in BIM (S2). The work plan may be created in advance or immediately before the power consumption calculation process.

[0093] In the work management server 50, after the power consumption calculation process, the comparison and determination unit 513 compares the capacity (remaining capacity) of the battery 201 mounted on the crane 20 with the power consumption (consumption amount) of the battery 201 based on the work plan that the crane 20 is scheduled to perform, and performs a comparison and determination process to determine whether or not the capacity of the battery 201 is insufficient (S3). Then, the visualization unit 514 performs a visualization process based on the comparison and determination result of the comparison and determination unit 513 to visualize the work that the crane 20 can perform before the battery 201 becomes insufficient, according to the work plan (S4). As for the details of the visualization process, as described above, the visualization unit 514 creates visualization information and the communication device 501 transmits the visualization information to the crane 20 and the information terminal 60.

[0094] As described above, this embodiment provides the following advantages. Based on the capacity of the battery 201 and the power consumption of the battery 201 based on the work plan that the crane 20 is scheduled to perform, the visualization information created by the visualization unit 514 is displayed on the display device 203 of the crane 20 or on the information terminal 60. This visualizes the work that the crane 20 can perform before the battery 201's capacity becomes insufficient, making it possible to predict in advance when the battery 201's capacity (remaining energy) will become insufficient and to more easily change the work plan.

[0095] Furthermore, by predicting in advance when the battery 201's capacity will become insufficient and responding to changes in work content, it is possible to minimize the time it takes for the battery 201 to recover from a state of insufficient capacity, even without installing a large-capacity battery 201 on the crane 20. Therefore, it is possible to prevent the crane 20 from becoming larger and to prevent impacts on work efficiency and transportability.

[0096] Furthermore, the visualization unit 514 visualizes the work processes that the crane 20 can perform before the battery 201 runs out of capacity, among the multiple work processes that make up the work plan. This makes it easy to predict when the battery 201 will run out of capacity, and makes it easier to change the work content, such as changing the work process.

[0097] [Second Embodiment] In the first embodiment described above, the crane 20 visualizes the types of work it can perform before the battery 201 runs out of capacity. In the second embodiment, in addition to this, if it is determined that there are tasks in the work plan that the crane 20 cannot perform because the battery 201 will run out of capacity, it proposes alternative tasks that consume less power. More specifically, if the visualization unit 514 determines that there are tasks in the work plan that cannot be performed, it creates visualization information that includes alternative tasks that consume less power, and the communication device 501 transmits the visualization information to the crane 20 and the information terminal 60. The configurations of the work management system 10 in this second embodiment are the same as in the first embodiment described above, and their explanation is omitted.

[0098] In this second embodiment, if it is determined that there is work that the crane 20 cannot perform in the work plan of the second embodiment described above, an example will be given in which alternative work with lower power consumption is proposed. As described above, in the work plan of the second embodiment, the comparison determination unit 513 determines that because the power consumption in work process A2 is high, the battery 201 will be depleted in work processes A2 to C2, and the following work processes B2 to D2 will be impossible to perform.

[0099] Therefore, in this embodiment, the visualization unit 514 proposes a new work plan that allows more processes to be completed than the original work plan by replacing the processes B2 to D2, which are determined to be impossible to execute due to insufficient battery capacity among the work processes A2 to H2 that constitute the work plan of the second embodiment, with the processes E2 to G2 that are scheduled to be executed at a later time.

[0100] Figure 15(A) is a graph (shown by a solid line) showing the changes in the capacity of battery 201 in a new work plan in which work processes B2 to D2 are replaced with work processes E2 to G2 scheduled to be executed at a later time. Figure 15(B) is visualization information showing whether the capacity of battery 201 is sufficient to continue work in each work process A2, E2 to G2, B2 to D2, and H2 in the new work plan.

[0101] As shown in Figure 15(A), in the new work plan, as in the work plan of the second embodiment shown in Figure 13(A), power is supplied to the battery 201 from the external power supply 70 so that the capacity of the battery 201 reaches 100% at the start time (8:00) of each work process A2, E2-G2, B2-D2, and H2. The figure shows the state in which the capacity of the battery 201 changes sequentially from the start time to the end time (17:00) for work processes A2, E2-G2, with a lunch break in between.

[0102] The graph in Figure 15(A) shows the battery capacity calculated every 15 minutes, which is a predetermined time interval, by the comparison and determination unit 513, which predicts the change in the capacity of the battery 201 in accordance with the power consumption based on the new work plan. During the lunch break (12:00 to 13:00), the power consumption of the battery 201 is 0, so the capacity of the battery 201 is higher than that supplied by the external power supply 70.

[0103] The graph in Figure 15(A) shows that because work processes E2 to G2, which can be performed using only the power supplied from the external power source 70 to the battery 201, are placed after work process A2, which consumes a large amount of power, there is no shortage of battery capacity in the battery 201, and the next work process B2 can be performed.

[0104] As mentioned above, work processes B2 to D2 consume more power than work processes E2 to G2, but during the lunch break between work processes G2 and B2, the capacity of battery 201, which is charged by power supplied from the external power source 70, increases. Therefore, work processes B2 to D2 do not result in a shortage of battery capacity in battery 201, and the next work process H2 can be executed. Furthermore, work process H2 can be executed solely by the amount of external power supplied to battery 201 from the external power source 70, and no shortage of battery capacity in battery 201 occurs.

[0105] In the new work plan shown in Figure 15(B), each work process A2, E2-G2, B2-D2, and H2 are indicated by cross-hatching or diagonal hatching. Therefore, this new work plan consisting of these work processes A2, E2-G2, B2-D2, and H2 does not result in a shortage of battery capacity 201, and all work processes A2, E2-G2, B2-D2, and H2 are executable.

[0106] Then, the visualization unit 514 creates visualization information for the new work plan created in the manner described above, based on the comparison and judgment result of the comparison and judgment unit 513, and the communication device 501 transmits the visualization information to the crane 20 and the information terminal 60.

[0107] [Effects of the second embodiment] As described above, this embodiment provides the following advantages. When the visualization unit 514 determines that there is a work plan in which the battery capacity 201 is insufficient and the crane 20 cannot perform the work, it suggests an alternative work plan that consumes less power from the battery 201. In addition to the advantages of the first embodiment described above, the work plan can be changed more easily by referring to the alternative work plan suggested by the visualization unit 514.

[0108] Furthermore, the visualization unit 514 proposes a new work plan that allows more processes to be completed than the original work plan by replacing the work processes that have been determined to be impossible to execute with work processes that are scheduled to be executed at a later time. In addition to the effects of the first embodiment described above, it is possible to make changes to the work content more easily by referring to the new work plan proposed by the visualization unit 514.

[0109] [First modified example of the second embodiment] In the second embodiment described above, an example is shown in which work processes B2 to D2, which were determined to be impossible to execute due to insufficient battery capacity in the work plan, are replaced with work processes E2 to G2, which are scheduled to be executed at a later time, in order to propose a new work plan. However, the invention is not limited to this example, and in this modified example, the visualization unit 514 proposes a new work plan in which the work processes that were determined to be impossible to execute are changed to multiple work processes that consume less power.

[0110] Figure 16(A) shows visualization information based on a work plan that includes work processes that were determined to be impossible to execute, while Figure 16(B) shows visualization information based on a new work plan in which the work processes that were determined to be impossible to execute have been changed to multiple work processes that consume less power.

[0111] As shown in Figure 16(A), the original work plan includes work processes A3 to H3. In work process C3, a condition occurs where the battery 201 capacity becomes insufficient, and it is determined that the next work process D3 cannot be executed. Therefore, in this modified example, the visualization unit 514 proposes a new work plan in which work process D3, which was determined to be impossible to execute, is changed to multiple work processes with lower power consumption.

[0112] As shown in Figure 16(B), in the revised work plan, work process D3, which was determined to be impossible to execute, has been changed to two work processes D3-1 and D3-2. For example, if work process D3 is the same as work process D1 in the first embodiment described above, work process D3 is the process in which the crane 20 moves material D, which consists of two materials D-1 and D-2. In this case, work processes D3-1 and D3-2 are the processes in which the crane 20 moves material D-1 and D-2 one by one. As a result, each of work processes D3-1 and D3-2 consumes less power than work process D3, preventing a situation in which the capacity of the battery 201 becomes insufficient.

[0113] As described above, in the revised work plan, work process D3-1 is placed in place of work process D3, and work process D3-2 is placed after work process D3-1, with a lunch break in between. Work processes E3 to H3 are shifted back and placed at later times from work process D3-2 onwards.

[0114] In the new work plan shown in Figure 16(B), each work process A3-C3, D3-1, D3-2, and E3-H3 are indicated by cross-hatching or diagonal hatching. Therefore, this new work plan consisting of these work processes A3-C3, D3-1, D3-2, and E3-H3 does not result in a shortage of battery capacity 201, and all work processes A3-C3, D3-1, D3-2, and E3-H3 are executable.

[0115] [Effects of the first modified example] As explained above, this modified version can achieve the following effects. When the visualization unit 514 determines that there is a work process in the work plan where the battery capacity 201 is insufficient and the crane 20 cannot perform it, it proposes a new work plan that is divided into multiple work processes with low power consumption. Therefore, by referring to the new work plan proposed by the visualization unit 514, it becomes easier to change the work content.

[0116] [Second modified example of the second embodiment] In this modified example, the visualization unit 514 proposes an alternative work process for a work process that has been determined to be impossible to execute, which involves moving the materials 40 along the shortest possible path. As explained with reference to Figures 4 to 9 in the first embodiment described above, when creating a work plan using BIM, there may be several types of paths that the crane 20 can take to move the materials 40. For example, if the work process that has been determined to be impossible to execute follows one of the paths shown in Figures 5 to 7, the visualization unit 514 proposes changing it to the work process that follows the path shown in Figure 8, which moves the materials 40 along the shortest possible path. Note that in the path shown in Figure 8, it is necessary to consider the time required for collision prevention measures in order to safely pass between the buildings 30 and 35.

[0117] When moving the same material 40, as described above, moving the material 40 along the movement path shown in Figure 8 minimizes the power consumption of the battery 201. However, this modification is not limited to this example; the visualization unit 514 may, for a work process determined to be impossible to execute, propose an alternative work process that moves the material 40 along a movement path that consumes less power from the battery 201 than the work process determined to be impossible.

[0118] In each of the embodiments described above, the visualization unit 514 visualizes the work processes that the crane 20 can perform before the remaining capacity becomes insufficient, among the multiple processes included in the work plan. However, the present invention is not limited thereto. For example, the work plan may include multiple operations in a single work process. In this case, the visualization unit 514 may visualize the operations that the crane 20 can perform before the battery 201 capacity becomes insufficient, among the multiple operations included in a single work process.

[0119] For example, the process of moving materials 40 by the crane 20 includes five actions: rigging, lifting, transporting, unloading, and detaching the rigging. "Rigging" is the action of attaching the materials 40 to the hook 110 using a wire. "Lifting" is the action of lifting the materials 40 attached to the hook 110 off the ground by raising the hoisting rope 151. "Transporting" is the action of moving the materials 40 horizontally by rotating the upper slewing body 103 and luffing the jib 108. "Unloading" is the action of lowering the materials 40 attached to the hook 110 to the ground by lowering the hoisting rope 151. "Detaching the rigging" is the action of removing the materials 40 from the hook 110.

[0120] If a single work process includes the actions of rigging, lifting, transporting, unloading, and removing the rigging in sequence, the comparison and determination unit 513 predicts the changes in the capacity of the battery 201 according to the power consumption based on these actions, and compares and determines the capacity of the battery 201 and the power consumption for each action. Then, the visualization unit 514 visualizes the actions that the crane 20 can perform in the work plan before the battery 201 becomes depleted, based on the comparison and determination result of the battery 201 capacity and the battery 201 power consumption, as determined by the comparison and determination unit 513. The visualization process, as in the above embodiments, includes the visualization unit 514 creating visualization information and the communication device 501 transmitting the visualization information to the crane 20 and the information terminal 60. More specifically, the visualization information includes information indicating whether the capacity of the battery 201 is sufficient to continue work (to perform the next action) for each action (rigging, lifting, transporting, unloading, and removing the rigging).

[0121] It should be noted that the present invention is not limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention. All technical matters included in the technical concept described in the claims are subject to the present invention. The embodiments described above are preferred examples, but those skilled in the art can realize various alternatives, modifications, variations, or improvements from the contents disclosed herein, and these are included in the technical scope described in the appended claims.

[0122] In each of the above embodiments, the visualization means is shown as a configuration that displays the work that the crane 20 can perform (visualization information) before the battery 201 becomes depleted. However, the visualization means is not limited to the configuration of each of the above embodiments, and only needs to be able to identify the work that the crane 20 can perform. For example, the types of colors, characters, symbols, or patterns used for identification can be set in advance, and the visualization means can change the displayed color, character, symbol, pattern, etc. based on this setting when the work that the crane 20 can perform is within the scope of the visualization means.

[0123] The above embodiments show examples of applying the present invention to a crane 20, but the present invention is not limited to this and can be applied to other mobile cranes such as all-terrain cranes, fixed cranes, and work machines in general. However, it is particularly effective in mobile cranes with a lower traveling body, especially crawler cranes, where power consumption can change significantly due to crawler movement and the load of the suspended load during lifting operations. Furthermore, when the power consumption calculation unit 512 (work management server 50) calculates the consumption of the battery 201, if cooling or heating is necessary according to the external environment of the work machine, the power consumption of the battery 201 may also be taken into account when calculating the consumption of the battery 201.

[0124] Furthermore, while a battery 201 is given as an example of an energy source installed in the work machine, it is not limited to this, and other fuels such as petroleum or natural gas may also be used. In this case, the work management server 50 acquires information such as the remaining amount of fuel installed in the work machine, and the comparison and determination unit 513 compares and determines the remaining amount of fuel installed in the work machine with the amount of fuel consumed based on the work plan that the work machine is scheduled to execute. [Explanation of Symbols]

[0125] 10. Work Management System 20 Cranes 30,35 Buildings 40 materials 50. Work Management Server 70 External power supply 101 Lower running body 102 Jib Relief Drum 103 Upper rotating body 104 Boom 105 Hook winding drum 106 Tower-shaped drum 107 Driver's cab 108 Jib 110 hooks 151 Hoisting rope 201 Battery 202 Communication equipment 203 Display device 204 Power connection section 205 Control device 501 Communication equipment 505 Control device 511 Information Acquisition Department 512 Power consumption calculation section 513 Comparison / judgment section 514 Visualization section

Claims

1. A work management system for controlling work performed by work machines, A work management system characterized by comprising: visualization means for visualizing the work content that the work machine can perform before the remaining amount of energy source installed in the work machine becomes insufficient, based on the remaining amount of energy source consumption based on the work plan that the work machine is scheduled to perform.

2. In the work management system described in claim 1, The aforementioned work plan includes multiple work processes, The work management system is characterized in that the visualization means visualizes the work processes that the work machine can perform before the remaining quantity becomes insufficient, among the plurality of work processes.

3. In the work management system described in claim 1, The work management system is characterized in that, if the visualization means determines that there is a work item in the work plan that is insufficient in terms of remaining quantity and therefore cannot be performed by the work machine, it proposes an alternative work item that consumes less energy.

4. In the work management system described in claim 3, The aforementioned work plan includes multiple work processes, A work management system characterized by proposing a new work plan that allows more work processes to be completed than the aforementioned work plan by replacing the work processes that have been determined to be impossible to execute with work processes that are scheduled to be executed at a later time, as an alternative work content.

5. In the work management system described in claim 3, The work plan includes moving the work object of the work machine, A work management system characterized by proposing, as an alternative work item, a work item that moves the work object along a travel route that consumes less energy than the work item that was determined to be impossible to perform.

6. In the work management system described in claim 3, The work plan includes moving the work object of the work machine while avoiding obstacles, A work management system characterized by proposing, as an alternative work item, a work item that is different from the work item that was determined to be impossible to perform, and that moves the work item along the shortest distance travel path.

7. In the work management system described in claim 1, The aforementioned energy source is a battery. A work management system characterized by, when the aforementioned work plan is executed, visualizing the work content that the work machine can perform before the remaining power becomes insufficient, based on the amount of external power that can be supplied from an external power source to the work machine and the battery.

8. In the work management system described in claim 1, The work management system is characterized in that, when the visualization means determines that the remaining quantity is insufficient and there are tasks that the work machine cannot perform, it visualizes the recovery time from the occurrence of the insufficient quantity until the work machine becomes operational.

9. A work management program that causes a computer to perform a visualization process that visualizes the work that the work machine can perform before the remaining energy source becomes insufficient, based on the remaining amount of the energy source installed in the work machine and the amount of the energy source consumed based on the work plan that the work machine is scheduled to perform.

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