Parameter management system and work vehicle

Abstract

To provide a parameter management system which can perform reliable parameter update processing without using an external apparatus such as a personal computer for maintenance inspection.SOLUTION: A parameter management system comprises: a display panel 8B which is installed in a work vehicle to display the state of the work vehicle; a non-volatile memory 55a which records a control parameter group consisting of control parameters used for control of apparatuses installed on the work vehicle; a manual operation tool 8a which designates the control parameter displayed on the display panel; and a modified parameter management part 55b in which a control parameter value displayed on the display panel 8B is determined by operation through the manual operation tool 8a to be written into the non-volatile memory 55a.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to a parameter management system for managing parameters of equipment installed in a work vehicle, and a work vehicle equipped with this parameter management system.

Background Art

[0002] Patent Document 1 discloses a riding lawn mower in which drive wheels are controlled based on a detection value of a potentiometer that detects an operation position of a shift operating tool. This riding lawn mower is provided with reference value updating means for performing an update storage process of updating and storing, as a reference value (a kind of parameter), the value of the potentiometer when the shift operating tool is in the reference operation position. At that time, the update storage process is performed by a predetermined operation on the shift operating tool in a state where the vehicle body is stopped. For example, each of the neutral position and the maximum speed position of the shift operating tool is set as the reference operation position, the value of the potentiometer when the shift operating tool is operated to each reference operation position is detected, and this detected value is stored as an update value (updated parameter) of the neutral position and the maximum speed position.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] According to Patent Document 1, the parameter update process is convenient because when the shift operating tool is operated to a predetermined position during parking, the update process of predetermined parameters is performed. However, since the actual parameter values are not confirmed, the reliability of the parameter update process is low. In pre-shipment inspections and maintenance inspections by service technicians, a maintenance inspection personal computer or the like is connected to the control system, and the parameter update process is carried out while actually displaying the stored parameters on the personal computer screen. Although high reliability can be obtained with such a parameter update process, the operation of connecting a maintenance inspection personal computer or the like and looking at the screen is troublesome.

[0005] In view of the above situation, there is a need for a parameter management system that can perform a highly reliable parameter update process without using external devices such as a maintenance inspection personal computer, and a work vehicle equipped with this parameter management system.

Means for Solving the Problems

[0006] The parameter management system for a work vehicle according to the present invention includes a display panel equipped on the work vehicle to display the state of the work vehicle, a non-volatile memory that records a control parameter group consisting of control parameters used for controlling the devices mounted on the work vehicle, an artificial operating tool for designating the control parameters displayed on the display panel, and a change parameter management unit that determines the values of the control parameters displayed on the display panel by an operation using the artificial operating tool and writes them into the non-volatile memory.

[0007] According to this configuration, the display panel installed on the work vehicle for displaying the state of the work vehicle is also used for displaying control parameters used for controlling the equipment mounted on the work vehicle. The value of the control parameter specified by an operation using a manual operation tool is displayed on the display panel. Further, when it is confirmed that the control parameter value displayed on the display panel is appropriate, the control parameter is determined by an operation using a manual operation tool and written into the non-volatile memory. Without using an external data processing terminal such as a laptop computer, the update processing person performs the update processing of the control parameter while checking the value of the control parameter on the display panel of the work vehicle, so this parameter update processing is highly reliable.

[0008] The display panel usually displays the vehicle speed, equipment temperature, battery state, etc. When this display panel is used for the update processing of the control parameter, a special signal is given to the display control system. In one embodiment of the present invention, based on a special operation signal, in the maintenance mode that shifts from the normal display mode, the display panel is configured to be able to display the value of the control parameter of the equipment. In this configuration, when a special operation signal is generated by some method, the display panel functions to display the value of the control parameter, so there is no need for the trouble of connecting external devices.

[0009] The update processing of the control parameter is preferably performed by a specific expert. Therefore, in one embodiment of the present invention, the special operation signal is generated by a hidden command that is hidden from general users.

[0010] The control of the equipment mounted on the work vehicle is performed based on the detection signal of a detection sensor that detects a predetermined state of the equipment. Therefore, the control parameter is related to the detection signal indicating the predetermined state of the corresponding equipment. From this, in the present invention, the change parameter management unit is configured to update the value of the corresponding control parameter based on the detection signal of the detection sensor that detects the predetermined state of the equipment.

[0011] When there are multiple control devices targeted for parameter update processing, it is preferable that the control devices to be displayed on the display panel can be switched easily and reliably. For this reason, in the present invention, the predetermined state of the device corresponding to the control parameter displayed on the display panel is switched to a different predetermined state by a specific operation of the manual operation tool. By simply performing a specific operation on the manual operation tool, the display screen of the control parameter of the control device that becomes the display target on the display panel and the update target of the control parameter can be switched, so that the update work of the control parameters for a plurality of control devices becomes easy.

[0012] The subject matter of the rights of the present application includes not only the parameter management system described above, but also a work vehicle equipped with such a parameter management system, and such a work vehicle can enjoy various advantages of the parameter management system described above.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

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Figure 8

Embodiments for Carrying Out the Invention

[0014] In this specification, unless otherwise specified, "front" means the front in the longitudinal direction (travel direction) of the vehicle body, and "rear" means the rear in the longitudinal direction (travel direction) of the vehicle body. Also, the left-right direction or the lateral direction means the transverse direction of the vehicle body (vehicle width direction) perpendicular to the longitudinal direction of the vehicle body. "Upper" or "lower" is the positional relationship in the vertical direction (perpendicular direction) of the vehicle body, indicating the relationship at ground height. In the figures, "front" is indicated by "F", "rear" by "B", "left" by "L", "right" by "R", "upper" by "U", and "lower" by "D".

[0015] Next, one embodiment of the work vehicle according to the present invention will be described. Here, the work vehicle is an electric lawn mower (hereinafter simply referred to as the work vehicle). As shown in FIGS. 1 and 2, this work vehicle includes a pair of left and right front wheels 11 supported at the front part of the vehicle body 1, a pair of left and right rear wheels 12 as drive wheel units supported at the rear part of the vehicle body 1, and a lawn mowing device 3 as a work device supported between the front wheels 11 and the rear wheels 12 at the lower part of the vehicle body 1. A device storage part 60 for storing a battery 6 etc. is provided between the left and right rear wheels 12. Further, a driver's seat 13, a rollover protective structure frame 14, etc. are provided on the vehicle body 1.

[0016] The vehicle body 1 includes a frame 10 composed of left and right longitudinal beams extending in the longitudinal direction and cross beams connecting these longitudinal beams. The lower end of the rollover protective structure frame 14 is connected to the frame 10.

[0017] The front wheels 11 are caster type wheels, and the rear wheels 12 are drive wheels. Inside each of the rear wheels 12, a left travel motor 41 and a right travel motor 42 are arranged as travel electric motors. The power of the left travel motor 41 and the right travel motor 42 is transmitted to the rear wheels 12 via a speed reduction mechanism 16. Each rear wheel 12 is independently driven.

[0018] As shown in FIG. 2, fenders 8 are arranged on the right and left sides of the driver's seat 13. On both sides of the driver's seat 13, a left shift lever 17a and a right shift lever 17b as vehicle speed setting tools for setting a desired vehicle speed are arranged. When the right shift lever 17b is operated to the neutral position, the right traveling motor 42 stops. When the right shift lever 17b is operated to the forward side, the right traveling motor 42 rotates to the forward side, and when the right shift lever 17b is operated to the reverse side, the right traveling motor 42 rotates to the reverse side. Similarly, when the left shift lever 17a is operated to the neutral position, the forward side, and the reverse side, the left traveling motor 41 performs the same operation as the above-described right traveling motor 42. That is, by operating the right shift lever 17b and the left shift lever 17a, the right and left rear wheels 12 are independently driven to the forward side or the reverse side, and the vehicle body 1 moves forward or backward, turns right or turns left.

[0019] As shown in FIG. 1, a lawn mowing device 3, which is an example of a working device, includes a mower deck 30 and a mowing blade 31 rotatably supported around a vertical axis inside the mower deck 30. The mowing blade 31 is a rotary blade and is rotationally driven by a mower motor 43, which is a working electric motor. The mower deck 30 is suspended from the frame 10 by a link mechanism 34 so as to be vertically movable.

[0020] FIG. 3 shows the power system and control system of the work vehicle. The mower motor 43 is provided on the rear wall of the mower deck 30. The mower motor 43 rotates a rotary shaft 32 to which the mowing blade 31 is attached via a belt transmission mechanism 33. A left traveling motor 41 is provided to rotate the left rear wheel 12, and a right traveling motor 42 is provided to rotate the right rear wheel 12.

[0021] Power is supplied from the inverter 4 to the left traveling motor 41, the right traveling motor 42, and the mower motor 43. The inverter 4 includes a traveling motor inverter 4A that supplies power to the left traveling motor 41 and the right traveling motor 42, and a mower motor inverter 4B that supplies power to the mower motor 43. The inverter 4 is driven and controlled based on a control signal from the control unit 5. The inverter 4 is connected to a battery 6 as a power source.

[0022] As shown in FIG. 4, the left shift lever 17a and the right shift lever 17b swing and displace around the first swing axis P1, respectively. This swing displacement is a displacement in the longitudinal direction of the vehicle body and is referred to as a longitudinal displacement. Further, the left shift lever 17a and the right shift lever 17b also swing and displace around the second swing axis P2, respectively. This swing displacement is a displacement in the lateral direction of the vehicle body and is referred to as a lateral displacement.

[0023] As shown in FIG. 5, a guide unit 20 for guiding the base end portions of the left shift lever 17a and the right shift lever 17b is provided for stable displacement (swing) of the left shift lever 17a and the right shift lever 17b. The guide unit 20 is a plate structure, and a vertical guide slot 21 for guiding the longitudinal displacement of the left shift lever 17a or the right shift lever 17b and a lateral guide slot 22 for guiding the lateral displacement of the left shift lever 17a or the right shift lever 17b are formed on the upper surface. The vertical guide slot 21 is connected to the lateral guide slot 22 at the central portion of the vertical guide slot 21.

[0024] As shown in FIG. 5, the displacement path of the left shift lever 17a guided by the vertical guide slot 21 and vertically displaced is referred to as the first path L1, and the displacement path of the right shift lever 17b guided by the vertical guide slot 21 and vertically displaced is referred to as the second path L2. The displacement path of the left shift lever 17a guided by the horizontal guide slot 22 and horizontally displaced is referred to as the third path L3, and the displacement path of the right shift lever 17b guided by the horizontal guide slot 22 and horizontally displaced is referred to as the fourth path L4. The first path L1 and the third path L3 are connected at the branch point JP, and the second path L2 and the fourth path L4 are connected at the branch point JP. The first path L1 and the third path L3 are substantially orthogonal to each other at the branch point JP, and the second path L2 and the fourth path L4 are substantially orthogonal to each other at the branch point JP. Here, the forward-side end of the first path L1 and the second path L2 is defined as "F" (forward maximum speed), and the reverse-side end of the first path L1 and the second path L2 is defined as "R" (reverse maximum speed). Further, the outer ends of the third path L3 and the fourth path L4 are defined as "P" (parking).

[0025] As shown in FIG. 4, near the base end of the left shift lever 17a, a left potentiometer 19a (a kind of detection sensor) for detecting the vertical displacement (swing angle around the first swing axis P1) of the left shift lever 17a along the first path L1 is provided. Similarly, near the base end of the right shift lever 17b, a right potentiometer 19b (a kind of detection sensor) for detecting the vertical displacement (swing angle around the first swing axis P1) of the right shift lever 17b along the second path L2 is provided. Further, near the base end of the left shift lever 17a, a limit switch 15 for detecting that the left shift lever 17a is located at a specific position set on the third path L3 is provided. A limit switch 15 is also provided near the base end of the right shift lever 17b for performing the same detection. As shown in FIG. 4, the left potentiometer 19a, the right potentiometer 19b, and the limit switch 15 are connected to the control unit 5 as a sensor group for the shift lever, and their detection signals are given to the control unit 5.

[0026] As shown in FIG. 6, the right fender 8 is provided with an operation panel 8A and a display panel 8B. The display panel 8B is provided with various notification lamps and a liquid crystal display 80. Notification lamp groups for notifying various vehicle states are arranged on the left and right sides of the liquid crystal display 80. The liquid crystal display 80 can selectively display various information. The operation panel 8A is provided with an operation device group such as switches and dials for operating the operating devices mounted on the work vehicle. This operation device group includes an artificial operation tool 8a for selecting the display information displayed on the liquid crystal display 80 and for selecting the driving mode of the work vehicle.

[0027] As shown in FIG. 7, the control unit 5 includes, as control function parts related to the present invention, a vehicle body control part 50, a traveling control part 52, a mower control part 53, a display operation signal processing part 54, a memory management part 55, a battery management part 56, and the like.

[0028] The vehicle body control part 50 has a function of controlling in-vehicle devices based on the vehicle state. Device sensor groups 9A for detecting various states of the work vehicle and various operation device groups 9B mounted on the work vehicle are connected to the input / output processing part 51 included in the vehicle body control part 50. Further, a left potentiometer 19a, a right potentiometer 19b, and a limit switch 15, which are sensor groups for shift operation, are also connected to the input / output processing part 51. Although this device is also included in the device sensor group 9A, here, for the sake of easy understanding of the control parameter update processing described later, the device sensor group 9A is shown in a separate frame. The input / output processing part 51 performs necessary conversion processing on the received sensor signal and sends this signal to the control function part that requires this signal.

[0029] The traveling control unit 52 generates a motor control signal based on signals from associated control functional units, and drives the inverter 4A for the traveling motor to independently drive and control the left traveling motor 41 and the right traveling motor 42. Note that the inverter 4A for the traveling motor includes an inverter for the left traveling motor 41 and an inverter for the right traveling motor 42. The mower control unit 53 also generates a motor control signal based on signals from associated control functional units, and drives the inverter 4B for the mower motor to drive and control the mower motor 43.

[0030] The display operation signal processing unit 54 receives operation signals (e.g., specific operation signals) from various operating tools for operating display information on the display panel 8B, such as the manual operating tool 8a, and operation signals (e.g., special operation signals) from other operating tools, generates internal commands based on the operation signals, and provides the internal commands to control functional units that require the internal commands.

[0031] The memory management unit 55 writes, reads, and further updates control parameters (control parameter groups) used for controlling devices installed in the work vehicle to / from the non-volatile memory 55a. For this purpose, the memory management unit 55 has a non-volatile memory 55a and a change parameter management unit 55b. When the value of the control parameter displayed on the display panel 8B is determined by an operation using the manual operating tool 8a, the change parameter management unit 55b rewrites the corresponding control parameter in the non-volatile memory 55a with the value of the control parameter.

[0032] The control unit 5 appropriately operates the vehicle body control unit 50, the display operation signal processing unit 54, the memory management unit 55, the battery management unit 56, and the display panel 8B to manage the display processing and update processing of various control parameters. The flow of the values of the control parameters in this process is shown by the dotted line in FIG. 7. The value of the control parameter read from the non-volatile memory 55a is displayed on the display panel 8B as the memory value of the control parameter of the device (designated device) specified by the operation using the manual operation tool 8a. Also, the value of the control parameter at the reference position of the designated device is acquired by the input / output processing unit 51 and sent to the display panel 8B, and thus is displayed on the display panel 8B as the real value of the control parameter. Further, the updated value of the control parameter is sent from the change parameter management unit 55b to the display panel 8B and is displayed on the display panel 8B as the updated value of the control parameter. With such a configuration, the amount of data flowing through the data communication line (for example, in-vehicle LAN) between the display panel 8B and the control unit 5 is small, and the communication load is low. The battery management unit 56 cooperates with the battery 6 (specifically, the battery-side battery management unit) to construct a battery management system (BMS).

[0033] In the update process of the control parameter managed by the control unit 5, the transition of the screen displayed on the display panel 8B is shown in FIG. 8. The start screen SS in the update process of the control parameter is the screen indicating the maintenance mode shown at the uppermost part of FIG. 8, and the display state of the screen is in state B. The screen group shown in FIG. 8 is the screen displayed on the liquid crystal display 80 in the maintenance mode. Since the work starting from the start screen SS is basically limited to the maintenance inspector, the transition from the screen in the normal display mode to the screen in this maintenance mode is made possible by a special operation signal generated by a special operation using the operation tool, that is, a hidden command hidden from the general user.

[0034] In this embodiment, the screen transition with the maintenance mode screen as the start screen SS is based on a specific operation signal generated by operating an artificial operation tool 8a provided adjacent to the display panel 8B. At this time, different specific operation signals are generated by a long press operation and a short press operation of the artificial operation tool 8a. In the following description, these are simply referred to as "long press" and "short press". Also, in the transition diagram of FIG. 8, the arrow indicating the transition by "long press" is shown by a thick line, and the arrow indicating the transition by "short press" is shown by a dotted line.

[0035] In the start screen SS, when "LRCalibration (hereinafter simply referred to as LR calibration)" is selected and a "long press" is performed, the display state of the screen changes from state B to state A. In FIG. 8, the screen group that can be selectively displayed in display state: A is drawn in a 5-row 3-column matrix with the fifth row of the first column being blank. Here, in order to identify these screens, symbols Sij (i = 1, 2, 3, 4: j = 1, 2, 3) similar to row-column representation are used. S51 is blank.

[0036] Each screen Sij in display state: A is a screen for LR calibration. LR calibration is the calibration of the left shift lever 17a and the right shift lever 17b, that is, the parameter calibration of the left potentiometer 19a and the right potentiometer 19b shown in FIG. 4. Specifically, it is the calibration of the detection values (control parameters) at predetermined positions (for example, at "F", "R", "P") of each potentiometer. That is, "F", "R", "P" indicate the predetermined states of the left shift lever 17a and the right shift lever 17b. Note that the numerical values shown in each screen Sij are the numerical values registered in the non-volatile memory 55a, the raw values of each potentiometer, the temporary registration values to the non-volatile memory 55a, and the like. This calibration is performed to correct manufacturing errors, mounting errors, aging change errors, etc. of the potentiometers.

[0037] On each screen: Sij, there are arranged "L" indicating the left shift lever 17a, "R" indicating the right shift lever 17b, "Home" indicating the home screen, "F", "R" (different from "R" indicating the right shift lever 17b) indicating the predetermined positions of the respective potentiometers, "P", "4-digit numerical value" indicating the control parameter value (detected value) at each predetermined position of the respective potentiometers, "Register" indicating registration (writing), and a symbol indicating "return".

[0038] Display state: When transitioning from display state B to display state A, the screen: S11, which is the top screen for LR calibration, is displayed. On the screen: S11, "L" indicating the left shift lever 17a is emphasized (lit), suggesting the calibration of the left shift lever 17a. When "short-pressed" on the screen: S11, it transitions to the screen: S12. On the screen: S12, "R" indicating the right shift lever 17b is emphasized (lit), suggesting the calibration of the right shift lever 17b. When "short-pressed" on the screen: S12, it transitions to the screen: S13. The screen: S13 is the home screen, and "Home" is emphasized (lit). When "short-pressed" on the screen: S13, it returns to the screen: S11. When "long-pressed" on the screen: S13, it returns to the starting screen SS. When "long-pressed" on the screen: S11, it transitions to the screen: S21.

[0039] Screen: S21 is the calibration screen for the "F" position of the left shift lever 17a, and "F" is highlighted (lit). To calibrate the "F" position of the left shift lever 17a, the left shift lever 17a is operated to the "F" position. The control parameter values displayed here are memory values read from the non-volatile memory. Further, when "long pressed" on screen: S21, it transitions to screen: S22, and the control parameter values at the "F" position of the left shift lever 17a are highlighted (lit) and displayed. This highlighted control parameter value is the real value acquired by the input / output processing unit 51. Thereby, the real value of the control parameter value is confirmed. When "long pressed" on screen: S22, it transitions to screen: S23 where "F" is highlighted (lit), the calibration of the "F" position of the left shift lever 17a is confirmed, and the change parameter management unit 55b temporarily registers the control parameter value. The control parameter value (covered with diagonal lines in FIG. 8) displayed here is the updated value.

[0040] When "long pressed" on screen: S23, it returns to screen: S22, and when "short pressed" on screen: S22, it returns to screen: S21. When "short pressed" on screen: S21 or when "short pressed" on screen: S23, it transitions to screen: S31.

[0041] Screen: S31 is the calibration screen for the "P" position of the left shift lever 17a, and "P" is highlighted (lit). To calibrate the "P" position of the left shift lever 17a, the left shift lever 17a is operated to the "P" position. The control parameter values displayed here are memory values read from the non-volatile memory. Further, when "long pressed" on screen: S31, it transitions to screen: S32, and the control parameter values at the "P" position of the left shift lever 17a are highlighted (lit) and displayed. This highlighted control parameter value is the real value acquired by the input / output processing unit 51. Thereby, the real value of the control parameter value is confirmed. When "long pressed" on screen: S32, it transitions to screen: S23 where "P" is highlighted (lit), the calibration of the "P" position of the left shift lever 17a is finalized, and the change parameter management unit 55b temporarily registers the control parameter value. The control parameter value (covered with diagonal lines in FIG. 8) displayed here is the updated value.

[0042] When "long pressed" on screen: S33, it returns to screen: S32, and when "short pressed" on screen: S32, it returns to screen: S31. When "short pressed" on screen: S31 or when "short pressed" on screen: S33, it transitions to screen: S41.

[0043] Screen: S41 is the calibration screen for the "R" position of the left shift lever 17a, and "R" is emphasized (lit). To calibrate the "R" position of the left shift lever 17a, the left shift lever 17a is operated to the "R" position. The control parameter values displayed here are memory values read from the non-volatile memory. Further, when "long pressed" on screen: S31, the screen transitions to S32, and the control parameter values at the "R" position of the left shift lever 17a are emphasized (lit) and displayed. This emphasized control parameter value is the real value acquired by the input / output processing unit 51. Thereby, the real value of the control parameter value is confirmed. When "long pressed" on screen: S32, the screen transitions to S23 with "R" emphasized (lit), the calibration of the "R" position of the left shift lever 17a is confirmed, and the change parameter management unit 55b temporarily registers the control parameter value. The control parameter value (covered with diagonal lines in FIG. 8) displayed here is the updated value.

[0044] When "long pressed" on screen: S43, the screen returns to S42, and when "short pressed" on screen: S42, the screen returns to S41. When "short pressed" on screen: S41 or when "short pressed" on screen: S43, the screen transitions to S53.

[0045] Screen: S53 is the registration (update) screen for control parameters, and "Register" is emphasized (lit). In response to the transition to this screen, the change parameter management unit 55b writes the temporarily registered control parameter value to the non-volatile memory 55a via the memory management unit 55. When "long pressed" on screen: S53, the temporarily registered value is written to the non-volatile memory 55a, and the screen transitions to S52. When "short pressed" on screen: S53, the screen transitions to S52 without writing the temporarily registered value to the non-volatile memory 55a.

[0046] Screen: S52 is the intermediate end screen, and "Return" is emphasized (lit). When "long pressed" on screen: S52, the screen returns to S11, and when "short pressed" on screen: S52, the screen returns to S21.

[0047] In addition, in each screen: Sij, the fact that a "four-digit numerical value" indicating the control parameter value (detection value) at each predetermined position of each potentiometer is shaded means that the value is temporarily registered as an updated value.

[0048] The control parameter calibration process described above with reference to FIG. 8 related to the left shift lever 17a, but the control parameter calibration process for the right shift lever 17b is also performed in the same manner.

[0049] [Other Embodiments] (1) In the above-described embodiment, an electric lawn mower is taken as the work vehicle, but lawn mowers driven by internal combustion engines, work vehicles other than lawn mowers, for example, agricultural work vehicles, civil engineering work vehicles, construction work vehicles, or multi-purpose vehicles, etc. are also included in the work vehicle of the present invention.

[0050] (2) In the above-described embodiment, as the control parameters to be displayed, the control parameters related to the potentiometers of the left shift lever 17a and the right shift lever 17b are taken up, but the present invention is also applicable to the control parameters related to the detectors of other devices (such as lifting devices and accelerator pedals).

[0051] (3) In the above-described embodiment, different specific operation signals are generated by the long-press operation and the short-press operation using the manual operation tool 8a, but an operation using a plurality of operation tools may be adopted. Also, if there is a sequential screen transition without branching, it is also possible to perform the screen transition with a single operation using a single operation tool.

[0052] (4) In FIG. 7, the arrangement of the functional blocks shown by the rectangular frames is for illustrative purposes, and each functional block can be arbitrarily integrated with other functional blocks or divided into a plurality of functional blocks.

[0053] In addition, the configurations disclosed in the above-described embodiments (including other embodiments, the same applies hereinafter) can be applied in combination with the configurations disclosed in other embodiments as long as there is no contradiction. Also, the embodiments disclosed in this specification are examples, and the embodiments of the present invention are not limited thereto, and can be appropriately modified within the scope not departing from the object of the present invention.

Industrial Applicability

[0054] The present invention is applicable to the screen transition of control parameters used for controlling equipment mounted on a work vehicle.

Explanation of Signs

[0055] 5: Control unit 8A: Operation panel 8B: Display panel 8a: Manual operation tool 9A: Equipment sensor group 9B: Operating equipment group 15: Limit switch 17a: Left shift lever 17b: Right shift lever 19a: Left potentiometer 19b: Right potentiometer 50: Vehicle body control unit 51: Input / output processing unit 54: Display operation signal processing unit 55: Memory management unit 55a: Non-volatile memory 55b: Changed parameter management unit 80: Liquid crystal display SS: Departure screen

Claims

1. A parameter management system for a work vehicle, comprising: a display panel installed on the work vehicle for displaying the state of the work vehicle; a non-volatile memory for recording a control parameter group consisting of control parameters used for controlling equipment mounted on the work vehicle; an artificial operation tool for designating the control parameters displayed on the display panel; a change parameter management unit that determines the values of the control parameters displayed on the display panel by an operation using the artificial operation tool and writes them into the non-volatile memory.

2. The parameter management system according to claim 1, wherein in a maintenance mode that shifts from a normal display mode based on a special operation signal, the display panel can display the values of the control parameters of the equipment.

3. The parameter management system according to claim 2, wherein the special operation signal is generated by a hidden command that is concealed from general users.

4. The parameter management system according to claim 1, wherein the change parameter management unit updates the values of the corresponding control parameters based on detection signals of detection sensors that detect a predetermined state of the equipment.

5. The parameter management system according to claim 4, wherein a predetermined state different from the predetermined state corresponding to the control parameters displayed on the display panel is switched by a specific operation of the artificial operation tool.

6. A work vehicle equipped with the parameter management system according to any one of claims 1 to 5.

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