Control method for a work machine, control program for a work machine, display system for a work machine, and work machine

Abstract

The present invention provides a control method for a work machine, a control program for a work machine, a display system for a work machine, and a work machine that can display appropriate information when the work machine is electrified. [Solution] The control method for a work machine is a control method for a work machine that includes an electric motor driven by battery power as a power source that generates power for driving the work part. This control method includes displaying a display screen Dp1, which includes a first image G1 relating to the output state of the electric motor and a second image G2 relating to the charge state of the battery, on the display unit of the display device.

Description

Technical Field

[0001] The present invention relates to a control method for a working machine, a control program for a working machine, a display system for a working machine, and a working machine, which are used in a working machine.

Background Art

[0002] As related art, a working machine (backhoe) equipped with a display device is known (see, for example, Patent Document 1). In the working machine according to the related art, the display device has a display unit and an operation unit. A display screen such as a home screen is displayed on the display unit. A selection item display area is arranged at the lower part of the display screen, and various selection items are displayed in the selection item display area.

[0003] The operation unit includes a plurality of operation switches arranged below the display unit (below the selection item display area). The plurality of switches correspond one-to-one to the selection items displayed in the selection item display area. A function of receiving an instruction to select one of the selection items displayed in the selection item display area is assigned to the plurality of operation switches. That is, each of the plurality of operation switches receives an instruction to select the corresponding selection item.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the above related art, the electrification of the working machine is not considered, and there is a possibility that appropriate information cannot be displayed when the working machine is electrified.

[0006] The object of the present invention is to provide a control method for a work machine, a control program for a work machine, a display system for a work machine, and a work machine that can display appropriate information when the work machine is electrified. [Means for solving the problem]

[0007] A control method for a work machine according to one aspect of the present invention is a control method for a work machine that includes an electric motor driven by battery power as a power source for generating power to drive the work machine, and the method involves displaying a display screen on the display unit of a display device that includes a first image relating to the output state of the electric motor and a second image relating to the charge state of the battery.

[0008] A control program for a work machine according to one aspect of the present invention is a program that causes one or more processors to execute a control method for the work machine.

[0009] A display system for a work machine according to one aspect of the present invention comprises a display device for the work machine and a display processing unit. The work machine includes an electric motor driven by battery power as a power source that generates power for driving the work machine. The display processing unit causes the display unit of the display device to display a display screen including a first image relating to the output state of the electric motor and a second image relating to the charge state of the battery.

[0010] A work machine according to one aspect of the present invention comprises a display system for the work machine and a machine body on which the display device is mounted. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a control method for a work machine, a control program for a work machine, a display system for a work machine, and a work machine that can display appropriate information when the work machine is electrified. [Brief explanation of the drawing]

[0012] [Figure 1]Figure 1 shows the overall configuration of the work machine according to Embodiment 1, and is a schematic perspective view taken from the front. [Figure 2] Figure 2 shows the overall configuration of the work machine according to Embodiment 1, and is a schematic perspective view taken from the rear. [Figure 3] Figure 3 is a schematic block diagram showing the work machine according to Embodiment 1. [Figure 4] Figure 4 is a schematic perspective view showing the operating section of the work machine according to Embodiment 1. [Figure 5] Figure 5 is a schematic external view of the display device of the work machine display system according to Embodiment 1. [Figure 6] Figure 6 shows an example of a display screen displayed by the display system for work machines according to Embodiment 1. [Figure 7] Figure 7 shows an example of a display screen displayed by the display system for work machines according to Embodiment 1. [Figure 8] Figure 8 is a flowchart showing an example of the operation of the display system for work machines according to Embodiment 1. [Modes for carrying out the invention]

[0013] The embodiments of the present invention will be described below with reference to the attached drawings. The following embodiments are examples that embody the present invention and are not intended to limit the technical scope of the present invention.

[0014] (Embodiment 1) [1] Overall structure As shown in Figures 1 and 2, the work machine 3 according to this embodiment comprises a travel unit 31, a swivel unit 32, and a work unit 33. The work machine 3 also includes an operator's unit 34 on which a rider can sit. The operator's unit 34 includes a driver's seat, etc. In this embodiment, the travel unit 31, swivel unit 32, work unit 33, and operator's unit 34 are included in the machine body 30 of the work machine 3.

[0015] Further, as shown in FIG. 3, the working machine 3 further includes a control system 1 for working machines (hereinafter, also simply referred to as "control system 1"). In addition, the machine body 30 further includes a display device 2, a power source 4, a hydraulic pump 5, an operating device 35, a cutoff lever 36, and various sensors (including a sonar and a camera, etc.).

[0016] The "working machine" referred to in the present disclosure means various working machines. As an example, it is a work vehicle such as a backhoe (including a hydraulic excavator, a mini excavator, etc.), a wheel loader, and a carrier. The working machine 3 includes a working unit 33 configured to be able to execute one or more operations. The working machine 3 is not limited to a "vehicle", and may be, for example, a working flying object such as a working ship, a drone, or a multicopter. Further, the working machine 3 is not limited to a construction machine (construction equipment), and may be, for example, an agricultural machine (agricultural equipment) such as a rice transplanter, a tractor, or a combine. In the present embodiment, unless otherwise specified, the working machine 3 is a ride-on type backhoe, and the case where it can execute operations such as excavation work, land leveling work, trench excavation work, or loading work as an example will be described. More specifically, it is assumed that the working machine 3 according to the present embodiment is an "ultra-small turning type" in which the slewing unit 32 including the working unit 33 can make a full turn within 120% of the full width of the traveling unit 31 (the full width of the pair of left and right crawlers 311), or a "rear ultra-small turning type" in which the rear turning radius ratio is within 120%.

[0017] Also, in the present embodiment, as an example, the passenger boarding the driver's cab 34 is an operator, and the working machine 3 operates according to the operation of the operator. However, it is not limited to this example, and for example, the working machine 3 may be operable by remote control or autonomous driving. Further, the driver's cab 34 may be able to accommodate a plurality of passengers simultaneously, and in this case, a plurality of driver seats may be provided in one driver's cab 34.

[0018] In the present embodiment, for the sake of convenience of explanation, the vertical direction in the state where the working machine 3 can be used is defined as the up-down direction D1. Further, the front-back direction D2 and the left-right direction D3 are defined based on the direction seen from the operator who boards the operation unit 34 of the working machine 3. In other words, each direction used in the present embodiment is a direction defined based on the operation unit 34 of the working machine 3. When the working machine 3 moves forward, the direction in which the machine body 30 moves is the "front", and when the working machine 3 moves backward, the direction in which the machine body 30 moves is the "rear". Similarly, when the working machine 3 turns right, the direction in which the front end of the machine body 30 moves is the "right", and when the working machine 3 turns left, the direction in which the front end of the machine body 30 moves is the "left". Since the operation unit 34 is provided on the turning unit 32, as the turning unit 32 turns, the front-back direction D2 and the left-right direction D3 with respect to the traveling unit 31 change. Hereinafter, as shown in FIG. 1, the direction is defined in a state where the front of the operation unit 34 faces the traveling direction of the traveling unit 31. However, these directions are not intended to limit the usage direction (direction during use) of the working machine 3.

[0019] The working machine 3 includes an electric motor (electric motor) serving as the power source 4. The electric motor as the power source 4 is driven by receiving power supply from a (traveling) battery. The power source 4 generates at least the power for driving the working unit 33.

[0020] In the working machine 3, for example, the hydraulic pump 5 is driven by the power source 4, and hydraulic oil is supplied from the hydraulic pump 5 to the hydraulic actuators (including the hydraulic motor 61 and the hydraulic cylinder 62, etc.) of each part of the machine body 30, whereby the machine body 30 is driven. Such a working machine 3 is controlled, for example, by an operator who boards the operation unit 34 of the machine body 30 operating an operation lever or the like of the operation device 35.

[0021] In this embodiment, as described above, it is assumed that the work machine 3 is a ride-on type backhoe, so the work unit 33 is driven according to the operation of the operator (driver) seated in the driver's unit 34 and performs work such as excavation. The work unit 33 is supported by the slewing unit 32 on which the driver's unit 34 is located. Therefore, when the slewing unit 32 rotates, the work unit 33 rotates together with the driver's unit 34.

[0022] Here, the control unit 34 of the machine body 30 is equipped with an operating device 35 and a display device 2, etc., and the operator can operate the operating device 35 while viewing various information related to the work machine 3 displayed on the display device 2. For example, information related to the operating status of the work machine 3, such as the hydraulic oil temperature, is displayed on the display screen Dp1 (see Figure 5) of the display device 2, so that the operator can check the information related to the operating status of the work machine 3 necessary for operating the operating device 35 on the display device 2.

[0023] The running unit 31 has a driving function and is configured to be able to travel on the ground (including turning). The running unit 31 has, for example, a pair of left and right crawlers 311 and a blade 312. The running unit 31 further has a hydraulic motor 61 (hydraulic actuator) for driving the crawlers 311.

[0024] The slewing section 32 is positioned above the traveling section 31 and is rotatable relative to the traveling section 31 in a plan view. In other words, the slewing section 32 is located above the traveling section 31 and is configured to rotate around a rotation axis aligned vertically with respect to the traveling section 31. The slewing section 32 has a hydraulic motor or the like as a hydraulic actuator for slewing. In addition to the operating section 34, the slewing section 32 is equipped with a power source 4 and a hydraulic pump 5, etc. Furthermore, the slewing section 32 is provided with a boom bracket to which the working section 33 is attached. In a plan view, the slewing section 32 has a substantially circular shape with a flat cutout at its front end. The slewing section 32 is rotatable around the center of this circular shape as its rotation axis.

[0025] The work unit 33 is supported by the slewing unit 32 and is configured to perform one or more operations. The work unit 33 is supported by the boom bracket of the slewing unit 32 and performs operations. The work unit 33 has a bucket 331. The bucket 331 is a type of attachment (working tool) that is attached to the body 30 of the work machine 3, and consists of any tool selected from a plurality of types of attachments according to the content of the work. For example, the bucket 331 is detachably attached to the body 30 and is replaced according to the content of the work. Examples of (end) attachments for the work machine 3 include, in addition to the bucket 331, various tools such as breakers, augers, crushers, forks, fork claws, steel frame cutters, asphalt milling machines, brush cutters, rippers, mulchers, tilt rotators, and tampers.

[0026] The working section 33 further includes a boom 332, an arm 333, and a hydraulic actuator (including a hydraulic cylinder 62 and a hydraulic motor, etc.). The bucket 331 is attached to the tip of the arm 333. The bucket 331 is supported on the arm 333 so as to be rotatable about a rotation axis along the horizontal direction.

[0027] The boom 332 is rotatably supported by the boom bracket of the slewing section 32. Specifically, the boom 332 is rotatably supported by the boom bracket around a rotation axis along the horizontal direction. The boom 332 has a shape that extends upward from a base end supported by the boom bracket. The arm 333 is connected to the tip of the boom 332. The arm 333 is rotatably supported relative to the boom 332 around a rotation axis along the horizontal direction.

[0028] The work unit 33 operates by receiving power from an electric motor, which serves as the power source 4. Specifically, the power source 4 (electric motor) drives the hydraulic pump 5, and hydraulic fluid is supplied from the hydraulic pump 5 to the hydraulic actuators (hydraulic cylinders 62, etc.) of the work unit 33, causing each part of the work unit 33 (bucket 331, boom 332, and arm 333) to operate.

[0029] In this embodiment, the work unit 33 has a multi-joint structure in which the boom 332 and arm 333 are configured to rotate independently. That is, by each of the boom 332 and arm 333 rotating around a rotation axis along the horizontal direction, the multi-joint work unit 33 including the boom 332 and arm 333 can be extended or folded as a whole. Furthermore, the bucket 331 as an attachment is supported by the machine body 30 (swivel section 32) via the boom 332 and arm 333, and the bucket 331 can be opened and closed by rotating the bucket 331 itself relative to the arm 333.

[0030] The traveling section 31 and the slewing section 32, like the working section 33, operate by receiving power from the electric motor, which serves as the power source 4. In other words, the slewing section 32 and the traveling section 31 operate when hydraulic fluid is supplied from the hydraulic pump 5 to the hydraulic motor 61 of the traveling section 31 and the hydraulic motor of the slewing section 32, etc.

[0031] Furthermore, the work machine 3 is equipped with a drive device (mechanism) such as a PTO (Power take-off) for supplying power to the bucket 331 (attachment). Specifically, the drive device sends hydraulic fluid from a hydraulic pump driven by the power source 4 to the bucket 331, and adjusts the amount of power supplied to the bucket 331 by adjusting the flow rate of the hydraulic fluid.

[0032] The driver's compartment 34 is a space for the operator to sit in, and in this embodiment, it is located on the slewing section 32. Therefore, when the slewing section 32 rotates in a plan view, the driver's compartment 34 also rotates with it. Specifically, when the slewing section 32 is divided in the left-right direction D3, the driver's compartment 34 is provided on the left side. The driver's compartment 34 has at least a driver's seat where the operator sits.

[0033] The types of operating units 34 for construction machinery and other work machines 3 include cabin type, canopy type, and floor type. A cabin-type operating unit 34 is equipped with a cabin 341, and the operator sits in the cabin space inside the cabin 341. A canopy-type operating unit 34 is equipped with a canopy (roof), and the operator sits in the space below the canopy. A floor-type operating unit 34 is not equipped with a cabin 341 or canopy, and the operator sits in an open space above. In other words, the operating unit 34 can include not only a configuration in which the perimeter is enclosed by panels, etc., but also various configurations in which a space is provided where an operator can sit. In this embodiment, the case where the operating unit 34 is of the cabin type will be described as an example.

[0034] In this embodiment, the driver's unit 34 is located above the left crawler 311 (see Figure 1). With this arrangement, the operator will get on and off the driver's unit 34 from its left side. Therefore, in this embodiment, the door 342 of the driver's unit 34 is located on the left side in the left-right direction D3 of the driver's unit 34. In other words, the operator will board and disembark from the driver's unit 34 through the door 342 located on the left side of the driver's unit 34.

[0035] The cabin-type driver's unit 34 is equipped with a cabin 341 that covers the driver's seat. The cabin 341 forms the outer shell of the driver's unit 34, and the operator sits inside the cabin 341. The cabin 341, along with the door 342, surrounds the cabin space on all four sides.

[0036] The operating device 35 is located in the driver's unit 34 and is a user interface for receiving operation input from the operator. In this embodiment, as an example, the operating device 35 includes an operating lever located to the side in the left-right direction D3 of the front end of the driver's seat. This allows the operator, while seated in the driver's seat, to operate the operating device 35 without significantly changing their posture.

[0037] As shown in Figure 4, the display device 2 is located in the control unit 34 of the machine body 30 and is a user interface for receiving operation input from the user (operator) and outputting various information to the user. The display device 2 accepts various operations from the user by outputting electrical signals corresponding to the user's operations, for example. As a result, the user (operator) can view the display screen Dp1 (see Figure 5) displayed on the display device 2 and operate the display device 2 as needed.

[0038] As shown in Figure 3, the display device 2 comprises a control unit 21, an operation unit 22, and a display unit 23. The display device 2 is configured to communicate with the control system 1 and can exchange data with the control system 1. In this embodiment, as an example, the display device 2 is a dedicated device used in the work machine 3.

[0039] The control unit 21 controls the display device 2 according to data from the control system 1. Specifically, the control unit 21 outputs electrical signals corresponding to user operations received by the operation unit 22, and displays the display screen Dp1 generated by the control system 1 on the display unit 23.

[0040] The operation unit 22 is a user interface for receiving user (operator) operation input for the display screen Dp1 displayed on the display unit 23. The operation unit 22 accepts various operations by the user, for example, by outputting electrical signals corresponding to the user's operation. In this embodiment, as an example, the operation unit 22 includes a plurality of (in this case, four) mechanical push-button switches 221 to 224, as shown in Figures 4 and 5. These plurality of push-button switches 221 to 224 are arranged adjacent to the display area (to the right in the example of Figure 4) along the periphery of the display area of ​​the display unit 23. These plurality of push-button switches 221 to 224 are associated with items displayed on the display screen Dp1, and when any of the plurality of push-button switches 221 to 224 are operated, any of the items on the display screen Dp1 are operated (selected).

[0041] Furthermore, the operation unit 22 may include a touch panel and an operation dial. In this case as well, an operation on the operation unit 22 will result in an operation (selection) of one of the items on the display screen Dp1.

[0042] The display unit 23 is a user interface for presenting information to the user (operator), such as a liquid crystal display or an organic EL display that displays various types of information. The display unit 23 presents various types of information to the user through display. In this embodiment, as an example, the display unit 23 is a full-color liquid crystal display with a backlight, and as shown in Figures 4 and 5, it has a horizontally elongated "landscape" display area.

[0043] The display device 2 presents various information to the user (operator) operating the work machine 3 via the display screen Dp1. In other words, the user operating the work machine 3 can visually obtain various information related to the work machine 3 by looking at the display screen Dp1 displayed on the display device 2. For example, the display device 2 displays information related to the operating status of the work machine 3, such as travel speed (vehicle speed) and hydraulic oil temperature, so that the user can check the information related to the operating status of the work machine 3 that is necessary for operating the work machine 3 on the display device 2.

[0044] The cutoff lever 36 is located in the control unit 34 of the machine body 30 and accepts operational input from the operator. In this embodiment, as an example, the cutoff lever 36 is operable along the vertical direction D1. In response to the operation of the cutoff lever 36, a control valve located on the pilot signal supply path is driven, and the opening and closing of the pilot signal supply path is switched.

[0045] Specifically, when the cutoff lever 36 is in the "lower position," which is the lower end of its range of motion, the control valve enters an "unlocked state," opening the flow path. On the other hand, when the cutoff lever 36 is in the "upper position," which is the upper end of its range of motion, the control valve enters a "locked state," blocking the flow path. The control system 1 monitors whether the cutoff lever 36 is in the lower or upper position.

[0046] When the control valve is locked, the pilot signal is interrupted, preventing the hydraulic fluid from the hydraulic pump 5 from being supplied to the hydraulic circuit. This renders at least the actuators of the travel unit 31 and the work unit 33 inoperable, causing the travel unit 31 and the work unit 33 to stop forcibly without operation of the operating device 35. Thus, when the cutoff lever 36 is in the "up position," the work machine 3 is in an "unoperable state," meaning that at least the travel unit 31 and the work unit 33 cannot be operated. On the other hand, when the cutoff lever 36 is in the "down position," the work machine 3 is in an "operable state," meaning that the travel unit 31, the slewing unit 32, and the work unit 33 can be operated. The cutoff lever 36 is the lever operated when locking the operation of the work machine 3 in this way, and is synonymous with the gate lock lever.

[0047] In addition to the above-described configuration, the aircraft 30 is further equipped with a detection unit (including sensors and cameras, etc.) for monitoring its surroundings, a sound output unit, a communication terminal, and a battery. Furthermore, the aircraft 30 is equipped with sensors for monitoring its operating status, such as a hydraulic oil temperature sensor, a speedometer for measuring travel speed, and an hour meter for measuring operating time.

[0048] [2] Control system configuration Next, the configuration of the control system 1 according to this embodiment will be described with reference to Figure 3. The control system 1 controls the display device 2 to display the display screen Dp1 on the display device 2. In other words, in this embodiment, the control system 1 has the function of a display control system for a work machine that controls at least the display device 2. This control system 1, together with the display device 2, constitutes the display system 10 for the work machine. In other words, the display system 10 for the work machine according to this embodiment comprises the control system 1 and the display device 2.

[0049] In this embodiment, the display device 2 is mounted on the machine body 30 of the work machine 3 as described above. The control system 1 is a component of the work machine 3 and together with the machine body 30, etc., constitutes the work machine 3. In other words, the work machine 3 according to this embodiment comprises at least the control system 1 and the machine body 30 (including the traveling unit 31, the operating unit 34, and the working unit 33) on which the display device 2 is mounted.

[0050] In this disclosure, "screen" as used in display screen Dp1, etc., means the image (video) displayed on the display device 2, and includes illustrations, figures, photographs, text, and videos. That is, the control system 1 can display on the display device 2 a display screen Dp1 that includes illustrations, etc., representing information about the operating status of the work machine 3, such as the travel speed (vehicle speed) and hydraulic oil temperature. Here, if the display screen Dp1 includes videos, etc., the display screen Dp1 does not include a constant video, but rather a video that changes moment by moment.

[0051] As shown in Figure 3, the control system 1 includes an acquisition processing unit 11 and a display processing unit 12. In this embodiment, as an example, the control system 1 mainly consists of a computer system having one or more processors, so these multiple functional units (display processing unit 12, etc.) are realized by one or more processors executing a control program for the work machine. These multiple functional units included in the control system 1 may be distributed and provided in multiple housings, or they may be provided in a single housing.

[0052] The control system 1 is configured to communicate with devices provided in various parts of the aircraft body 30. In other words, the control system 1 is connected to at least the display device 2, the operating device 35, and the cutoff lever 36. This allows the control system 1 to control the display device 2, etc., and to acquire the operating status of the display device 2, the operating device 35, and the cutoff lever 36, etc. Here, the control system 1 may exchange various types of information (data) directly with each device, or indirectly via a relay or the like.

[0053] The acquisition processing unit 11 performs an acquisition process to acquire information regarding the operating status of the display device 2 and the operating device 35, and information regarding the detection results of sensors for monitoring the operating status of the machine 30. In other words, the control system 1 receives various operations for controlling the work machine 3 at the acquisition processing unit 11, and also receives outputs from sensors for monitoring the operating status of the machine 30, such as the battery charge level.

[0054] Specifically, the operation unit 22 of the display device 2 outputs an operation signal corresponding to the user's operation, and the acquisition processing unit 11 acquires this operation signal. Furthermore, the acquisition processing unit 11 acquires sensor signals from sensors that monitor the operating status of the machine 30, such as the hydraulic oil temperature sensor and the battery charge status (remaining charge, etc.). The data acquired by the acquisition processing unit 11 is stored, for example, in memory.

[0055] The display processing unit 12 performs display processing to display various display screens Dp1 on the display device 2. Specifically, the display processing unit 12 generates a display screen Dp1 based on data acquired by the acquisition processing unit 11, and controls the display device 2 to display the display screen Dp1 on the display unit 23 of the display device 2. Furthermore, the display processing unit 12 operates in response to operations received by the operation unit 22 of the display device 2.

[0056] [3] Control method for working machinery The following describes an example of a control method (hereinafter simply referred to as "control method") for the work machine 3, which is mainly performed by the control system 1, with reference to Figures 5 to 8.

[0057] The control method according to this embodiment is executed by a control system 1, which mainly consists of a computer system; in other words, it is embodied in a control program for a work machine (hereinafter simply referred to as the "control program"). That is, the control program according to this embodiment is a computer program that causes one or more processors to execute each process related to the control method. Such a control program may be executed in cooperation with, for example, the control system 1 and the display device 2.

[0058] Here, the control system 1 executes the following various processes related to the control method when a specific preset start operation is performed to execute the control program. The start operation is, for example, the operation to start the power source 4 (electric motor) of the work machine 3. On the other hand, the control system 1 terminates the following various processes related to the control method when a specific preset end operation is performed. The end operation is, for example, the operation to stop the power source 4 of the work machine 3.

[0059] [3.1] Display screen First, the configuration of the display screen Dp1 displayed on the display unit 23 of the display device 2 by the control method according to this embodiment will be described. In Figure 6, which shows the display screen Dp1 displayed on the display unit 23 of the display device 2, the dashed lines, leader lines, and reference numerals representing areas are all there for illustrative purposes only and are not actually displayed on the display device 2.

[0060] The display screen Dp1 shown in Figure 5 is the home screen that is initially displayed depending on the control method. The home screen is the basic display screen Dp1 that will be displayed first on the display device 2 while the work machine 3 is in operation. From the home screen, it is possible to transition to various display screens Dp1, including menu screens and setting screens, according to operations performed on the operation unit 22.

[0061] The home screen, which is the display screen Dp1, has a first area R1, a second area R2 (an example of a "function display area"), a third area R3, and a fourth area R4, as shown in Figure 6.

[0062] Specifically, the home screen Dp11 is divided into three areas vertically (up and down). The topmost area contains the third area R3. The middle area (second from the top) contains the first area R1 and the second area R2, arranged from left to right. The bottommost area contains the fourth area R4. In terms of vertical size, the middle area (second from the top) (including the first area R1 and the second area R2) is the widest of the three vertically divided areas. In terms of horizontal size, the third area R3 and the fourth area R4 are the widest because they span both horizontal edges (left and right) of the display area of ​​the display unit 23.

[0063] However, the arrangement and size of these regions are merely examples and can be changed as needed. Furthermore, it is not necessary for each region to be clearly separated by a boundary line. For example, in the example in Figure 6, the three vertically divided regions are clearly separated by a boundary line, while there is no boundary line between the first region R1 and the second region R2. Of course, for example, the first region R1 and the second region R2 could be clearly separated by a boundary line.

[0064] The first region R1 has a larger horizontal (left-right) size compared to the second region R2. The first region R1 includes at least the center C1 of the display screen Dp1 and is the widest region among the first to fourth regions R4.

[0065] The first region R1 displays the first image G1. The first image G1 represents information regarding the output state of the electric motor, which is the power source 4. In this embodiment, as an example, the first image G1 represents the magnitude of the output of the power source 4 (electric motor) as a percentage.

[0066] In other words, the first region R1 can display the output status of the power source 4 of the work machine 3 as the first image G1. The display processing unit 12 generates the first image G1 on the display screen Dp1 based on the sensor output (sensor signal) acquired by the acquisition processing unit 11.

[0067] In this embodiment, the first image G1 is a graph that mimics an analog meter. In an analog meter, a needle G11 rotates, and a value is displayed by the position of the needle G11. In other words, the first image G1 is information that indexes the output of the motor and represents it by the position of the needle G11 on the graph. Displaying the motor's output status in a graph has the advantage of being easy for the user to see and allowing them to intuitively understand the motor's output status. The first image G1 may represent the motor's output status not only with numerical values, but also, for example, with images (icons) or other patterns to represent the motor's output status in stages.

[0068] Furthermore, the second image G2 is displayed in the first region R1. The second image G2 represents information regarding the charge state of the battery that supplies power to the electric motor, which is the power source 4. In this embodiment, as an example, the second image G2 represents the remaining capacity (SOC: State of Charge) of the battery.

[0069] In other words, the first region R1 can display the battery charge status of the work machine 3 as the second image G2. The display processing unit 12 generates the second image G2 on the display screen Dp1 based on the sensor output (sensor signal) acquired by the acquisition processing unit 11.

[0070] In this embodiment, the second image G2 is a graph that mimics a bar graph. The second image G2 is information that indexes the remaining charge (remaining capacity) of the monitored object (in this case, the battery) and represents it by the length (height) of the bar graph. Displaying the battery's charge status in a graph has the advantage for the user that it is easy to see and allows them to intuitively understand the battery's charge status. The second image G2 may represent the battery's charge status not only with numerical values, but also in other ways, such as representing the battery's charge status in stages using images (icons), etc.

[0071] Thus, the control method according to this embodiment includes displaying a display screen Dp1 on the display unit 23 of the display device 2, which includes a first image G1 relating to the output state of the electric motor and a second image G2 relating to the charge state of the battery.

[0072] This allows the user (operator) to simultaneously recognize the current battery charge level (remaining charge, etc.) and the workload, which is represented by the motor's output status, by looking at the display screen Dp1. Therefore, the user can, for example, anticipate the operating time of the work machine 3 based on future work patterns and perform their tasks accordingly. As a result, there is the advantage of being able to display appropriate information when the work machine 3 is electrified.

[0073] Furthermore, at least one of the first image G1 and the second image G2 is a graph. In this embodiment, at least both of the first image G1 and the second image G2 are graphs (analog meters, bar graphs). This has the advantage that the user can easily see and intuitively understand at least one of the motor output status and the battery charge status.

[0074] Furthermore, the first image G1 is displayed next to the second image G2 on the display screen Dp1. In this embodiment, as an example, the first image G1 and the second image G2 are arranged side by side on the display screen Dp1 so as to be adjacent to each other horizontally (left to right). More specifically, the first image G1 is positioned in the center horizontally (left to right) of the first region R1, and the second image G2 is positioned to the left of the first image G1 in the first region R1.

[0075] This allows the user (operator) to view both the first image G1, which shows the output status of the electric motor, and the second image G2, which shows the charge status of the battery, with minimal eye movement, which are necessary for operating the work machine 3. Therefore, the operability of the motorized work machine 3 is improved.

[0076] Furthermore, in this embodiment, the distance from the first image G1 to the center C1 of the display screen Dp1 is shorter than the distance from the second image G2 to the center C1 of the display screen Dp1. In other words, the first image G1 is positioned closer to the center C1 of the display screen Dp1 than the second image G2.

[0077] As a result, when the user (operator) looks at the display screen Dp1, they are more likely to pay attention to the first image G1 than to the second image G2. Furthermore, the output state of the motor represented by the first image G1 is information that is constantly changing during operation by the work machine 3, compared to the battery charge state represented by the second image G2. By drawing attention to this changeable information (first image G1), the operability of the motorized work machine 3 is improved.

[0078] Furthermore, the fifth image G5 is displayed in the first region R1. The fifth image G5 represents information regarding the temperature of the hydraulic fluid (hydraulic fluid temperature) discharged by the hydraulic pump 5, which is driven by the electric motor, which is the power source 4.

[0079] In other words, the first region R1 can display the temperature of the hydraulic fluid discharged by the hydraulic pump 5 (hydraulic fluid temperature) as the fifth image G5. The display processing unit 12 generates the fifth image G5 on the display screen Dp1 based on the sensor output (sensor signal) acquired by the acquisition processing unit 11.

[0080] In this embodiment, the fifth image G5 is a graph that mimics a bar graph. The fifth image G5 is information that indexes the hydraulic oil temperature and represents it by the length (height) of the bar graph. Displaying the hydraulic oil temperature in a graph has the advantage of being easy for the user to see and to be able to intuitively understand the hydraulic oil temperature. The fifth image G5 may not only represent the hydraulic oil temperature numerically, but may also represent the hydraulic oil temperature in stages using, for example, an image (icon) or the like.

[0081] In this embodiment, the fifth image G5 is displayed next to the first image G1 on the display screen Dp1. That is, the fifth image G5, which relates to the temperature of the hydraulic fluid discharged by the hydraulic pump 5 driven by the electric motor, is displayed next to the first image G1 on the display screen Dp1. In this embodiment, as an example, the first image G1 and the fifth image G5 are arranged side by side on the display screen Dp1 so as to be adjacent to each other in the horizontal direction (left-right direction). More specifically, the first image G1 is positioned in the center of the first region R1 in the horizontal direction (left-right direction), and the fifth image G5 is positioned to the right of the first image G1 in the first region R1.

[0082] This allows the user (operator) to view both the first image G1, which shows the output status of the electric motor, and the fifth image G5, which shows the temperature of the hydraulic fluid, both of which are necessary for operating the work machine 3, with minimal eye movement. Therefore, the operability of the motorized work machine 3 is improved.

[0083] Furthermore, the second area R2 is a rectangular area with length in the vertical direction (up and down direction). Icons (images) I1 corresponding to the functions that can be set on the work machine 3 can be displayed in the second area R2. In other words, the second area R2 is an example of a function display area where icons I1 can be displayed.

[0084] Icons I1 are displayed according to the operating status of each part of the work machine 3, and the design (pattern) of each icon I1 indicates which status it represents, for example, the battery, seat belt, coolant temperature, hydraulic oil temperature, etc. Here, each icon I1 indicates the operating status by its display characteristics, such as display color or size. The display processing unit 12 determines the status of each part of the work machine 3 using the outputs of various sensors that detect the operating status of each part of the work machine 3. Then, if an abnormal value is detected in any part, the display processing unit 12 displays a warning by changing the display characteristics, such as the display color, of the icon I1 for that part.

[0085] Figure 6 illustrates the state in which icons I11 to I18 are displayed. Icon I11 indicates that the cutoff lever 36 is in the "up position". Icon I12 indicates that the seat belt has been detected. Icon I13 indicates that the auto-stop function of the work machine 3 is on (enabled). Icon I14 indicates that the battery warm-up function is on (enabled). Icon I15 indicates that the battery warm-up reservation is on (enabled). Icon I16 indicates that the travel unit 31 is in 2nd gear. Icon I17 indicates that the auto-decel function of the work machine 3 is on (enabled). Icon I18 indicates that the work machine 3 is in eco mode.

[0086] Thus, in this embodiment, a function display area (second area R2) capable of displaying icons I1 corresponding to functions that can be set on the work machine 3 is arranged on the opposite side (right side) of the fifth image G5 on the display screen Dp1 from the first image G1. This makes it possible to visually confirm the operating status of the functions that can be set on the work machine 3 on the display screen Dp1.

[0087] Furthermore, the third area R3 displays, for example, time information representing the current time, and operating time information related to the operating time (hour meter) of the work machine 3. In the example in Figure 6, the time information is located at the left end of the third area R3, and the operating time information is located at the right end of the third area R3.

[0088] Furthermore, the fourth region R4 is a rectangular region with length in the horizontal direction (left-right direction). The third image G3, the fourth image G4, the sixth image G6, and the seventh image G7 are displayed in the fourth region R4. In this embodiment, as an example, the fourth image G4, the third image G3, the sixth image G6, and the seventh image G7 are displayed in this order from left to right.

[0089] The third image G3 represents information regarding the operating time of the work machine 3. The operating time of the work machine 3 is the estimated time during which the work machine 3 can be operated continuously, and is calculated based, for example, on the battery charge level (remaining charge) and the motor output level. The display processing unit 12 calculates the operating time based on the battery charge level (remaining charge) and the motor output level and generates the third image G3 on the display screen Dp1.

[0090] The fourth image G4 is an explanatory image for the third image G3. In other words, the fourth image G4 explains that the third image G3 represents the operating time. For example, the fourth image G4 is an image that mimics a timer. In this embodiment, for example, the third image G3 and the fourth image G4 are arranged side by side horizontally (left to right) on the display screen Dp1. More specifically, the fourth image G4 is located at the left end of the fourth region R4, and the third image G3 is located to the right of the fourth image G4 in the first region R1.

[0091] As shown above, a third image G3, which represents the operating time of the work machine 3, is displayed below the second image G2 on the display screen Dp1. This allows the user (operator) to anticipate the operating time of the work machine 3 based on future work patterns and perform their tasks accordingly.

[0092] Furthermore, next to the third image G3 on display screen Dp1, a fourth image G4 is displayed to explain the third image G3. This makes it easier for the user (operator) to understand the meaning of the third image G3.

[0093] Image 6G6 shows information regarding the operating status of the work unit 33. Specifically, Image 6G6 shows the types of attachments mounted on the work unit 33.

[0094] Image 7, G7, shows information regarding the temperature of the cooling water. In other words, in the work machine 3, cooling water circulates to cool the electric motor (power source 4) and the inverter used to drive the motor. The temperature of this cooling water is shown in Image 7, G7.

[0095] Incidentally, the third image G3, which relates to the operating time of the work machine 3, includes a first value and a second value in different units. The first value and the second value alternate as time progresses. That is, on the display screen Dp1, the third image G3 relating to the operating time of the work machine 3 alternates between the first value and the second value each time a certain amount of time has passed.

[0096] In this embodiment, as an example, the first value represents the operating time in hours (h) as shown in Figure 6, and the second value represents the operating time in percentages (%) as shown in Figure 7. For example, if the operating time of the work machine 3 when the battery is fully charged is considered to be "100%", the second value represents what percentage of the remaining time the work machine 3 can operate.

[0097] This configuration allows the operating time of the work machine 3 to be visualized in multiple ways, making it easier for the user to understand the operating time.

[0098] Incidentally, the display mode of the first image G1, which shows the output state of the electric motor as the power source 4, may change according to the state of the work machine 3. This allows the user to recognize the state of the work machine 3 based on the display mode of the first image G1. The "display mode" here includes various elements such as color, size, and pattern.

[0099] For example, the display mode of the first image G1 is changed according to the operating mode of the work machine 3. These operating modes include auto idle mode, boost mode, and eco mode. The change in the display mode of the first image G1 according to these operating modes makes it easier for the user to recognize the operating mode of the work machine 3.

[0100] Furthermore, the display mode of the first image G1 may be changed depending on the state of the cutoff lever 36. In other words, if the cutoff lever 36 is in the "raised position" and the work machine 3 is inoperable, the display mode of the first image G1 will change to notify the user of this fact. In this way, by changing the display mode of the first image G1 depending on the state of the cutoff lever 36, it becomes easier for the user to recognize the state of the cutoff lever 36.

[0101] [3.2] Flowchart Figure 8 is a flowchart showing an example of the main processes related to the control method according to this embodiment.

[0102] As shown in Figure 8, the acquisition processing unit 11 first acquires data regarding the status of each part of the work machine 3, which is reflected on the display screen Dp1, such as the output status of the electric motor as the power source 4 and the charge status of the battery (S1).

[0103] Next, the display processing unit 12 generates a display screen Dp1 as the home screen based on the acquired data (S2). At this time, the display processing unit 12 generates a display screen Dp1 that includes the first image G1 and the second image G2, etc.

[0104] Then, the display processing unit 12 displays the generated display screen Dp1 on the display device 2 (S3). As a result, the display screen Dp1 shown in Figures 6 and 7 is displayed on the display unit 23 of the display device 2.

[0105] The control system 1 repeatedly executes steps S1 to S3 described above. This updates the display screen Dp1. However, the flowchart shown in Figure 8 is merely an example, and processes may be added or omitted as appropriate, or the order of processes may be changed as appropriate.

[0106] [4] Modified form The following lists some modifications of Embodiment 1. The modifications described below can be combined and applied as appropriate.

[0107] The control system 1 in this disclosure includes a computer system. The computer system mainly consists of one or more processors and one or more memories as hardware. The functions of the control system 1 in this disclosure are realized by the execution of a program recorded in the memory of the computer system by the processor. The program may be pre-recorded in the memory of the computer system, provided via a telecommunications line, or provided on a non-temporary recording medium such as a memory card, optical disk, or hard disk drive that can be read by the computer system. Furthermore, some or all of the functional parts included in the control system 1 may be composed of electronic circuits.

[0108] Furthermore, it is not essential for control system 1 to have at least some of its functions integrated into a single housing; the components of control system 1 may be distributed across multiple housings. Conversely, functions that are distributed across multiple devices (e.g., control system 1 and display device 2) in Embodiment 1 may be integrated into a single housing. Moreover, at least some of the functions of control system 1 may be implemented by the cloud (cloud computing) or the like.

[0109] Furthermore, the display device 2 is not limited to a dedicated device, but may be a general-purpose terminal such as a laptop computer, tablet terminal, or smartphone. Moreover, the display unit 23 is not limited to a configuration that directly displays the display screen, such as a liquid crystal display or an organic EL display, but may also be configured to display the display screen by projection, such as a projector.

[0110] Furthermore, the input method for information to the operation unit 22 may be other than push-button switches, touch panels, and operation dials. For example, the operation unit 22 may use methods such as a keyboard, a pointing device such as a mouse, voice input, gesture input, or input of operation signals from other terminals.

[0111] Furthermore, the power source 4 of the work machine 3 is not limited to an electric motor, but may also be a hybrid power source including, for example, an electric motor and an engine.

[0112] [Notes on the invention] The following is an overview of the invention extracted from the above-described embodiments. Note that each configuration and processing function described below can be selected and combined as desired.

[0113] <Note 1> A control method for a work machine that includes an electric motor driven by battery power as a power source for generating power to drive the work section, The display unit of the display device displays a display screen including a first image relating to the output state of the electric motor and a second image relating to the charge state of the battery. A method for controlling industrial machinery.

[0114] <Note 2> At least one of the first image and the second image is a graph. A method for controlling a work machine according to claim 1.

[0115] <Note 3> The display mode of the first image is changed according to the operating mode of the aforementioned work machine. A method for controlling a work machine according to claim 1 or 2.

[0116] <Note 4> Depending on the state of the cutoff lever, the display mode of the first image is changed. A method for controlling a work machine according to any one of claims 1 to 3.

[0117] <Note 5> The first image is displayed next to the second image on the display screen. A method for controlling a work machine according to any one of claims 1 to 4.

[0118] <Note 6> Below the second image on the display screen, a third image relating to the operating time of the work machine is displayed. A method for controlling a work machine according to any one of claims 1 to 5.

[0119] <Note 7> Next to the third image on the display screen, a fourth image is displayed to explain the third image. A method for controlling a work machine according to claim 6.

[0120] <Note 8> The third image includes a first value and a second value in different units, The first value and the second value alternate over time. A method for controlling a work machine according to claim 6 or 7.

[0121] <Note 9> The distance from the first image to the center of the display screen is shorter than the distance from the second image to the center of the display screen. A method for controlling a work machine according to any one of claims 1 to 8.

[0122] <Note 10> Next to the first image on the display screen, a fifth image relating to the temperature of the hydraulic fluid discharged by the hydraulic pump driven by the electric motor is displayed. A method for controlling a work machine according to any one of claims 1 to 9.

[0123] <Note 11> On the display screen opposite to the first image relative to the fifth image, a function display area is provided on which icons corresponding to functions that can be set on the work machine can be displayed. A method for controlling a work machine according to claim 10.

[0124] <Note 12> A control method for a work machine according to any one of claims 1 to 11, A control program for a work machine to be executed by one or more processors. [Explanation of Symbols]

[0125] 2 Display device 3. Working Machines 4 Power source 5. Hydraulic pump 10. Display system for work machinery 12 Display Processing Unit 23 Display section 30 aircraft 33 Work Unit 36 Cut-off lever Dp1 display screen G1 Image 1 G2 Image 2 G3 Image 3 G4 Image 4 G5 Image 5 I1 Icon R2 2nd area (function display area)

Claims

1. A control method for a work machine that includes an electric motor driven by battery power as a power source for generating power to drive the work section, The display unit of the display device displays a display screen including a first image relating to the output state of the electric motor and a second image relating to the charge state of the battery. A method for controlling industrial machinery.

2. At least one of the first image and the second image is a graph. A method for controlling a work machine according to claim 1.

3. The display mode of the first image is changed according to the operating mode of the work machine. A method for controlling a work machine according to claim 1 or 2.

4. Depending on the state of the cutoff lever, the display mode of the first image is changed. A method for controlling a work machine according to claim 1 or 2.

5. The first image is displayed next to the second image on the display screen. A method for controlling a work machine according to claim 1 or 2.

6. Below the second image on the display screen, a third image relating to the operating time of the work machine is displayed. A method for controlling a work machine according to claim 1 or 2.

7. Next to the third image on the display screen, a fourth image is displayed to explain the third image. A method for controlling a work machine according to claim 6.

8. The third image includes a first value and a second value in different units, The first value and the second value alternate over time. A method for controlling a work machine according to claim 6.

9. The distance from the first image to the center of the display screen is shorter than the distance from the second image to the center of the display screen. A method for controlling a work machine according to claim 1 or 2.

10. Next to the first image on the display screen, a fifth image relating to the temperature of the hydraulic fluid discharged by the hydraulic pump driven by the electric motor is displayed. A method for controlling a work machine according to claim 1 or 2.

11. On the display screen opposite to the first image relative to the fifth image, a function display area is provided on which icons corresponding to functions that can be set on the work machine can be displayed. A method for controlling a work machine according to claim 10.

12. A control method for a work machine according to claim 1 or 2, A control program for a work machine to be executed by one or more processors.

13. A display device for a work machine equipped with an electric motor driven by battery power as a power source that generates power for driving the work section, The device comprises a display processing unit that causes the display unit of the display device to display a display screen including a first image relating to the output state of the electric motor and a second image relating to the charge state of the battery. Display system for industrial machinery.

14. A display system for a work machine according to claim 13, The unit comprises a body on which the aforementioned display device is mounted, A type of machinery used for industrial work.

Images