JP3161855B2 - LCD device for agricultural machinery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display of an agricultural machine, and can be used for a tractor, a combine or the like.

[0002]

2. Description of the Related Art Various instruments are attached to agricultural machines such as tractors and combiners, and vehicle speed, engine speed, PTO, etc.
A device that displays the number of revolutions or the like is known. On the other hand, agricultural machines incorporate many automation technologies such as direction control, tillage control, and elevation control, and therefore, it is not uncommon for a plurality of control controllers to be mounted.

[0003]

By the way, in the case of such a conventional apparatus, if various instruments such as a vehicle speed meter and an engine tachometer are arranged in a number corresponding to the number of sensors, not only the cost becomes high, but also the instrument panel becomes expensive. The situation becomes serious, and the operator may get lost in judgment or overlook the sensor information. In addition, if a plurality of control controllers and an instrument panel are connected in parallel with a harness so that sensor information on the control controller side is directly input to a liquid crystal display unit provided on the instrument panel, the system becomes large. As a result, the manufacturing cost increases, and unnecessary sensor information also flows, resulting in waste. Of course, by adding specifications, etc.
When adding an additional controller,
When the controller is connected in parallel to the instrument panel,
Software of the existing controller
In addition, the hardware configuration must be changed.

[0004]

SUMMARY OF THE INVENTION The present invention is proposed in view of the above-mentioned problems, and sends only necessary information at low cost to an instrument panel side to make it easier for operators to use. Is what you do. Therefore, the following technical measures were taken. That is, a plurality of control controllers are connected to each other via a communication line, and one of the control controllers is set as a host controller and the other is set as a sub-controller. With the controller via the host controller
Connect the Subeku communication line, the liquid crystal display of the agricultural machine, characterized by being configured so as to be displayed on the liquid crystal display device via the communication line these host and sub-controller respectively connected to a variety of sensor information such as The configuration of the device.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. First, a description will be given of the configuration. Reference numeral 1 denotes a tractor provided with front wheels 2 and 2 and rear wheels 3 and 3 at front and rear portions of the body,
The rotational power of the engine 5 in the hood 4 is appropriately reduced by the transmission in the transmission case 6 to reduce the rotational power of the front wheels 2, 2.
To the rear wheels 3,3.

A transmission case 6 accommodates a reverse clutch 7 composed of a hydraulic clutch for forward / reverse switching, a four-speed main transmission 8 and a four-speed auxiliary transmission 9. The transmissions 8 and 9 are provided with operating levers.
Alternatively, the shifting is controlled electrically by an operating member 10 such as a push-button switch. A gear shift command is issued from a gear shift controller (EP) to each actuator (not shown) for moving the shifter. More specifically, when the operating member 10 is operated, the reverse scratch 7 is temporarily disengaged and becomes neutral, the actuator is actuated, the shift shifter (not shown) is moved, and the shifter is moved to a predetermined position. When this is confirmed by the position sensor 14, a control circuit is incorporated so that the reverse scratch 7 is connected again. The shift controller (EP) includes a shift lock switch 15 and a linear shift lever.
16, a boost valve 17 and the like are connected. The linear shift lever 16 is a lever for moving the fuselage forward and backward, and the shift lock switch 15 is such that when the switch is pressed, the shift operation is kept in a prohibited state.

A hydraulic cylinder case 20 is fixedly provided at the rear upper portion of the transmission case 6, and the hydraulic cylinder case 20 is provided.
A single-acting hydraulic cylinder 21 is provided in the casing 20, and lift arms 2 are provided on both left and right sides of the hydraulic cylinder case 20.
2, 22 are pivotally supported freely. Lift arm 2
Lift rods 25, 25 are connected between the lower links 24, 24 and the lower links 2, 22, and one of the lift rods 25 is constituted by a double-acting hydraulic cylinder 25a which can be extended and contracted. Top link 26, lower link 24, 2
A rotary tilling device 30 is connected to the rear end of the three-point link mechanism 28 made of 4 so as to be able to move up and down.

The rotary tilling device 30 has a main cover 31 for covering the cultivated portion, and a rear cover 32 pivotally supported at the rear thereof. The lower edge of the rear cover 32 is slid on the ground. To detect changes in tillage depth. For this reason, a depth sensor 33 is provided above the rear end of the main cover 31. Tillage control, rolling control, position,
Hydraulic elevating control such as depth is all performed by the host controller (W
X). The host controller (WX) includes a control lever 37 for moving the working machine up and down, a lift arm sensor 38 for detecting a rotation angle of the lift arm 22, a cultivation depth adjusting dial 40 for setting a cultivation depth, A slope sensor 42 for detecting the inclination angle of the body, a stroke sensor 43 for detecting the length of the hydraulic cylinder 21;
An ascending solenoid 44 for controlling a main hydraulic elevating circuit of the working machine, a descending solenoid 45, and solenoids 46 and 47 for extending and contracting a rolling hydraulic cylinder 21 are connected.

With this configuration, when the control lever 37 is rotated in the vertical direction, the working machine is position-controlled so as to have the height set by the control lever 37, and the working depth adjusting dial 40 is appropriately adjusted. When it is turned, it is controlled so that the tilling part of the rotary tilling device 30 is located at the adjustment position, and the host controller (WX)
When a tilt setter (not shown) connected to the controller is operated, the work machine is controlled to tilt to the set angle.

A full-time 4WD controller (K) for controlling the drive system of the front wheels 2 is provided to increase the peripheral speed of the front wheels 2 and to cut off the power of the front wheels 2. Things. The high / low speed switching device 50 provided in the transmission case 6 at the branch of the drive system for the front wheels 2 and the rear wheels 3 has a set of hydraulic clutches arranged in front and rear, When the steering wheel 51 is gripped and the front wheel 2 is rotated by a predetermined angle or more, the hydraulic clutch on the high speed side is engaged, the high / low speed switching device 50 switches to the high speed side, and when the steering handle 51 is returned to the original straight traveling state, the low speed side An interlocking structure is provided such that the hydraulic clutch is engaged to switch to a low speed side. The speed ratio is set such that the peripheral speed of the front wheels 2 is about twice the peripheral speed of the rear wheels 3 when the speed is increased, and the peripheral speeds of the front and rear wheels 2 and 3 are substantially equal when the speed is low.

When traveling on the road or turning at the edge of the field, the two hydraulic clutches are disconnected to cut off the power to the front wheels 2 and the high / low speed switching device 50 is set to the neutral state. As shown in FIG. 3, the full-time 4WD controller (K) includes a mode switching dial 53, an input shaft rotation sensor 54 for detecting the number of rotations of the input shaft of the high / low speed switching device 50, and a high / low speed switching device. An output shaft rotation sensor 55 for detecting the rotation speed of the output shaft 50, a steering wheel turning angle sensor 56, a 4WD solenoid 57 for switching the high / low speed switching device 50 to a low speed on the standard 4WD side, and a high speed for increasing the peripheral speed of the front wheel 2. Side, a full-turn solenoid 58 is connected. The mode switching dial 53 is used to set the traveling mode of the front wheels.
The mode can be switched between the standard 4WD mode and the front wheel speed-up mode.

On an instrument panel 70 provided in front of the driver's seat, various monitor lamps 71, a tachometer 72 for displaying the number of revolutions of the engine 5, a main transmission 8 and an auxiliary transmission 9 are provided.
A liquid crystal display 80 is provided along with a shift position display lamp 73, a water temperature gauge 74, and a fuel gauge 75 for displaying the shift position of the vehicle. indicate.

The instrument panel 70 is provided with a meter panel controller (M), which communicates with the host controller (WX) and displays information on sensors connected to other controllers. I do. As shown in FIG. 3, the meter panel controller (M) should be directly input without communication, for example, a mode switching dial 53, a reset switch 85, and a high-speed switching of the auxiliary transmission 9. A sub-shift H speed sensor 86 for detecting the state, which needs to be displayed immediately in conjunction with the operation of the operator, a wheel rotation sensor 82, a PTO rotation sensor 83, a PTO switch 84, and a fuel sensor 87 for detecting the amount of fuel are provided. Connected directly. This is to prevent the operator from feeling uncomfortable by displaying the state change simultaneously with the operation of the operator.

The above-described host controller (WX), speed-change controller (EP), and full-time 4WD controller (K) are connected via a communication line 60.
The symbol CLK used in the figure means a clock input. In this embodiment, the controller (WX) for hydraulic control is used as a host controller, and the other controllers (M), (EP) and (K) are used as sub-controllers. Communication with host controller (WX)
It is configured to be made via

More specifically, normal sensor information is communicated between WX and EP, WX and K, WX and M in this order, and exchanges sensor information connected to each controller. I do. In addition to sensor information, information useful for maintenance and the like, such as controller model and controller
It is convenient to include later versions of the la for later management. In other words, when replacing a component such as when a malfunction of the controller occurs, the controller type and the ROM bar can be communicated without removing the controller.
It becomes possible to know John and the like, and the replacement work can be performed quickly, and the number of mistakes in assembly is reduced. Further, in this embodiment, a microcomputer checker 90 can be further connected to the host controller (WX). Microcomputer checker 9
Reference numeral 0 denotes a tester for confirming whether the sensors and setting devices connected to each controller operate reliably.

Next, the flowchart of FIG. 4 will be described. This flowchart is a host controller (WX).
And the order of communication with the other controllers (EP), (K) and (M). Tillage control, horizontal control, and position control are performed independently, and communication is first performed between the host controller (WX) and the speed-change controller (EP). For this reason, the host controller (WX) gives the transmission controller (EP) reception permission and simultaneously issues a transmission request. At this time, the reception of the other two controllers (M) and (K) is prohibited (step S8). Next, the data of the speed change controller (EP) is received (step S9), and upon completion of the reception (step S10), communication with the full-time 4WD controller (K) is started (step S11). When the communication with the full-time 4WD controller (K) ends (step S13), the communication with the meta-panel controller (M) starts (steps S15 and S).
16). Hereinafter, this is repeated, and the host controller (WX) and other sub-controllers (EP), (K),
(M) exchanges sensor information and the like. In this case, as is clear from the figure, the communication between the host controller (WX) and the meter panel (M) is made last. That is, the sensor information of each sub-controller is once transmitted to the host controller by communication between the host controller (WX) and another sub-controller (EP) (K).
To the host (WX) side and then to the host controller (WX).
X) communicates with the data controller (M), so that the operator has the most important and urgent information from the information held by the host controller (WX) itself and the information held by the sub-controller. The information can be transmitted quickly.

FIG. 5 illustrates the state of communication performed between the meter panel controller (M) and the host controller (WX). When there is a transmission request from the host controller (WX), the sensor information (wheel rotation sensor value,
PTO rotation sensor value, sub-shift H speed sensor value, etc.) are transmitted to the host controller (WX). In the figure,
There are three methods for the content of the screen displayed on the liquid crystal display 80 depending on the model. In the type A screen, the PTO rotation speed is converted from the pulse obtained from the PTO rotation sensor 83, and obtained from the wheel rotation sensor 82. The vehicle speed is converted by the generated pulse, and these are displayed on the liquid crystal display 80. Type B
In the type vehicle having the screen of (1), the plowing depth set value is displayed in addition to the PTO rotation speed and the vehicle speed. This set value is displayed based on the data sent from the host controller (WX). On the type C screen, the PTO rotation speed, the vehicle speed, and the tillage depth set value are displayed. Immediately after the shift operation is performed, the vehicle speed is changed to the shift positions of the main and sub transmissions 8, 9 and the rated engine speed at that time. The vehicle speed based on the data of the wheel rotation sensor 82 is displayed after a lapse of a predetermined time.

[0018]

As described above, the present invention provides:
A plurality of control controllers are connected to each other by a communication line, and one of the control controllers is set as a host controller and the other is set as a sub-controller, and a controller of an instrument panel including the host controller and a liquid crystal display is provided. connected by communication line, these host and sub-controller respectively connected to a variety of sensor information such as, e
Since it is configured to display on the liquid crystal display via a communication line to pass through a strike controller ,
The instrument panel controller can sequentially display and output while receiving the sensor information and the like from the host controller among the control controllers, so that various sensor information and the like can be displayed on one liquid crystal display and the host controller can be displayed. And the sub controller are connected by a communication line, the host controller gives the sub controller reception permission,
Also, while issuing a transmission request, sensor information and the like connected to the sub-controller are obtained, and similar communication is sequentially performed with other sub-controllers. Therefore, each divided controller and the liquid crystal display are connected in parallel. Since connection work is omitted and the configuration is simple, a low-cost liquid crystal display device can be obtained. The host controller should be compatible with the standard specifications, and the sub-controller should be compatible with the optional specifications and additional specifications.Each time an option is added, the host controller only needs to change its software, and it does not require a separate hardware configuration. Is easy.

[Brief description of the drawings]

FIG. 1 is a side view of a tractor and a working machine.

FIG. 2 is a front view of an instrument panel.

FIG. 3 is a control block diagram.

FIG. 4 is a communication flow of a host controller.

FIG. 5 is a flow chart of a meter controller.

FIG. 6 is a flowchart of screen display.

FIG. 7 is a flowchart of a screen display.

FIG. 8 is a flowchart of screen display.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tractor 2 Front wheel 3 Rear wheel 7 Reverse scratch 24 Lower link 25 Lift rod 28 Three-point link mechanism 30 Rotary tilling device WX Host controller EP Gearshift controller K Fulltime 4WD controller M Meter panel controller

Claims (1)

(57) [Claims] A plurality of control controllers are connected to each other by a communication line, one of the control controllers is set as a host controller and the other is set as a sub-controller, and the host controller and a liquid crystal display are provided. The controller of the instrument panel is connected by a communication line, and various kinds of sensor information and the like connected to the host and the sub-controller are displayed on the liquid crystal display via the communication line so as to pass through the host controller. A liquid crystal display device for an agricultural machine, characterized in that: