JPH0710401Y2 - Automatic control device for work vehicle - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to an adjusting device for an automatic control device mounted on various work vehicles, and more specifically, it relates to a potentiometer for position detection connected to an in-vehicle microcomputer. Adjustment
The present invention relates to a device that can be easily operated anywhere such as a factory or a site.

(B) Conventional technology When a potentiometer for position detection, which is connected to a vehicle-mounted microcomputer, is attached to an operating member of a vehicle or a working machine, a potentiometer is conventionally installed with a link angle or position of the operating member set to a predetermined value. It was adjusted at the factory or the site using a specific checker or tester so that the initial value was set.

(C) Problems to be solved by the device When the potentiometer for position detection is adjusted and connected to the microcomputer at the factory, it is necessary to arrange special checkers at various places on the assembly line, and at the site etc. When checking the set value of the potentiometer or replacing the potentiometer or the microcomputer, the above adjustment work could not be performed without a checker or a tester.

(D) Means for solving the problems The present invention is to equip a vehicle-mounted microcomputer with normal control software for position control of actuating members as well as analog setting software, and by changing the external changeover switch,
By changing the execution from the normal control software to the analog setting software, and by activating the alarm when the analog input value of the position detection potentiometer of the operating member matches the set value, the changeover switch The above problems were solved by making it possible to easily perform the proper assembly and adjustment of the potentiometer not only in the assembly line of the factory but also in the field, etc. only by the switching operation.

(E) Action When assembling the position detection potentiometer to the operating member at the factory or on site, first set the operating member to the determined initial position and then switch the external selector switch to switch the microcomputer from the normal control software. Change to execution of analog set software. Then, the value of the potentiometer is adjusted to a set value corresponding to the initial position of the operating member while appropriately rotating the axis of the potentiometer with respect to the boss of the operating member.

At that time, when the value of the potentiometer input to the microcomputer coincides with the set value of the microcomputer, the annunciator informs that, and the shaft of the potentiometer is tightened to the boss of the operating member at that position to complete the adjustment.

When the setting adjustment is completed, set the external selector switch to OF
Switch to F and automatically control the position of actuating members with normal control software. In that case, the annunciator does not operate even if the value of the potentiometer for detection fluctuates during control.

(E) Embodiment An embodiment of the present invention will be described with reference to an automatic combine cutting height control device shown in the drawings. 1 is a threshing device mounted on one side of a machine base having a traveling device 1a, and the other side Although not shown, like the conventional one, the operation panel from the front part,
A pilot seat, a grain tank, and the like are provided, and a pretreatment device 2 including a mowing device and a decoy transfer device is attached to a front portion of the hydraulic cylinder 3 so as to be vertically tiltable. The hydraulic circuit A includes a check valve 4, a manual valve 5, a pretreatment lift lever 6 for operating the manual valve 5, and a pump P. A hydraulic lever switch 7 that is turned on when it is set to is installed oppositely, and a cutting height adjusting dial 8 of a potentiometer 9 on the adjusting side is provided on the operation panel.
A detection potentiometer 10 for detecting the cutting height H is attached to this.

And, the microcomputer 11 is the normal control software B
And the analog setting software C are installed therein and they are switched by the external changeover switch 12, and the normal control software B is the analog input which is the detection result of the detection potentiometer 10.
P2, ON / OFF of the hydraulic lever switch 7, and the analog input P1 which is the set value of the cutting height adjustment dial 8 are input, and the external changeover switch 12 is turned off. Comparison value and ON of hydraulic lever switch 7,
When the check valve 4 is turned off, the check valve 4 is turned on and off to cause the hydraulic cylinder 3 to expand and contract, thereby raising and lowering the pretreatment device 2 to a predetermined position.

Also, the software C for analog setting is the external changeover switch 12
Is ON, the designed setpoint PS and the analog input P2
And are compared with each other, and only when the two coincide with each other, the alarm is output to the horn 13 or a buzzer to operate it.

As shown in FIG. 2, the detection potentiometer 10 pivotally supports the shaft 10a of the shaft 10a on the boss 14 integrated with the machine frame, and the arm 15 loosely fitted on the shaft 10a is connected to the pretreatment device 2 by the connecting rod 16. If they are connected, when mounting the detection potentiometer 10 to the machine, set the arm 15 at a predetermined angle and
Insert 17 into shaft hole 10b and rotate.

At that time, the external selector switch 12 is turned on and the shaft 10
Rotate and adjust a. At that time, while the design set value PS and the analog output P2 from the potentiometer for detection 10 are different, the horn 13 does not operate, but if both match, the horn 13 operates, so tighten the bolt 18 there. arm
The shaft 15a and the shaft 10a are integrally connected, and the setting work is completed.

When such adjustment is completed, the external changeover switch 12
When the switch is turned off, the horn 13 does not operate and only the normal control software B operates, so that the cutting height is automatically adjusted.

Although the cutting height automatic control of the combine has been described in the above-mentioned embodiment, the present invention automatically controls the other parts of the combine,
Alternatively, the present invention is applied to automatic cultivating depth control in a tractor, and other devices that can control the position of a control member by using an operation detection value of the control member as an analog input.

(G) Effect of the invention Since the invention is configured as described above, the potentiometer (10) for position detection on the assembly line of the factory or the site
When assembling the operating member (2), the external selector switch (12) is switched to the analog setting software (C) side, and the microcomputer (11) is set to the execution state of the analog setting software. The analog input value (P2) in (10) and the preset value (PS) are compared in the microcomputer (11), and the alarm (13) activates only when both values match, so the potentiometer The assembling position of the (10) with respect to the actuating member (2) can be extremely easily manually adjusted so as to match the set value (PS) corresponding to the predetermined actuating position of the actuating member (2).

In addition, the potentiometer (10), which is fixed by adjusting the assembling position with respect to the actuating member (2) in this way, accurately moves the position of the actuating member (2) to a micro position when executing normal control software during work. Computers (11)
Can be input to the actuating member (2)
The position control of can be performed accurately.

Moreover, the potentiometer (10) assembly and adjustment work was carried out by effectively utilizing the input / output function of the microcomputer (11) itself for controlling the position of the operating member, and provided on the vehicle with the external changeover switch (12). Since it is possible to replace the microcomputer (11) with the adjusting device only by changing the connection of the alarm (13) to the microcomputer (11), it is not necessary to arrange checkers or testers at various places in the assembly line of the factory. Also, replacement and assembly can be performed quickly and reliably even in a place where there are no checkers or testers, such as the field.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is an input / output view, FIG. 2 is a sectional view of an assembly portion of a potentiometer for detection, and FIG. 3 is a flow chart of software. 9 ... Potentiometer on the control side, 10 ... Potentiometer for detection, 12 ... External changeover switch, 13 ... Horn, P2
…… Analog input, PS …… Set value

 ─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-60-241804 (JP, A) JP-A-47-23851 (JP, A) JP-A-60-192503 (JP, A) JP-A-60- 241803 (JP, A) Actually opened 61-31004 (JP, U) Actually opened 60-126806 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A signal from a potentiometer (10) for detecting the position of an actuating member (2) and other detectors (7) and (9) is input to a microcomputer (11), and based on the input signal. The position of the actuating member (2) is detected in a working vehicle in which the processing procedure defined by the normal control software (B) is executed and a predetermined output signal is issued to the solenoid valve (4) to control the position of the actuating member. Potentiometer (1
0) is so constructed that its mounting position can be adjusted between the actuating member and the mounting position can be fixed while the detected value of the potentiometer (10) matches the set value. Also, the microcomputer (11) incorporates analog setting software (C) in addition to the above normal control software (B), and the signal from the external changeover switch (12) inputs the normal control software to the analog set. The execution is changed to software, and when the analog input value (P2) of the potentiometer (10) matches the set value (PS) corresponding to the predetermined operating position of the operating member, the alarm (13) is activated. An automatic control device for a working vehicle, characterized in that it is configured to output as necessary.