JPH0530844A - System for diagnosing trouble in mobile agricultural working machine - Google Patents

Abstract

PURPOSE:To obtain the subject system capable of inputting plural data on switch operation to an information processor, turning off the input data if the plural switches are turned on when a key switch is turned on and preventing a noncontrol part from operating without any switch operation. CONSTITUTION:In a trouble diagnosing system in a mobile agricultural machine for processing the input from switches such as push switch for performing operation to turn on or off various apparatuses to be controlled with an information processor and performing control with outputs based on processed results thereof, operation data on plural switches (S1), (S2)...(Sn) are inputted to the information processor 2 and the processed results are outputted to the respective apparatuses to be controlled. If the switches (S1), (S2)...(Sn) are turned on when a key switch is turned on, it is regarded as trouble to turn off the input data of the switches (S1), (S2)...(Sn). Thereby, when various manual switches are in trouble, a noncontrol part is prevented from operating in a state without switch operation due to the aforementioned trouble by an operator.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile agricultural machine in which an information processing apparatus processes an input from a switch such as a push switch for turning on and off various controlled equipment and controls the output based on the processing result. Regarding the failure system in.

[0002]

2. Description of the Related Art Conventionally, a push switch is manually operated,
A mobile agricultural machine in which the operation result is processed by an information processing apparatus and a control signal is output to a controlled part such as an electromagnetic valve according to the processing result is already known.

[0003]

Since the known mobile agricultural machine is not configured to detect a switch failure, if the switch fails, the operator does not operate the push switch. Regardless, the operated state was input to the information processing apparatus, and the controlled part was activated depending on the processing result, which was dangerous.

[0004]

According to the present invention, a key switch is turned on in a mobile agricultural machine in which operation data of a plurality of switches is input to an information processing device and processing results are output to each controlled device. At this time, if the switch is ON, it is regarded as a failure, the input data of the switch is turned OFF, and the control output corresponding to the failed switch is stopped to solve the above problems. did.

[0005]

When the key switch is turned on to start the engine, the control circuit including the information processing device is also energized, whereby the failure diagnosis system operates without any operation of the switch. Is faulty, that is, if a signal that has been operated is input to the information processing apparatus even if it is not operated and it continues for 0.1 seconds, for example, the failure diagnosis system considers it to be a failure. Thus, the output based on the input is stopped, and the controlled device does not operate contrary to the driver's expectation. Also, if a failure is diagnosed for each switch and only the output corresponding to it is stopped, control based on normal switch operation can be performed, but operation corresponding to the failed switch will also work. Never.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.
And the moving agricultural machines such as combine harvesters and tractors.
Control, steering control, handling depth control, rotary tiller water
Flat control, plowing depth control, tilt control of grain tank, grain tank
For controlling the posture of the discharge auger
A solenoid valve or switch associated with them.
To operate the switch, place it near the driver's seat as shown in Fig. 1.
Push switch provided (momentary type) S₁ , S₂ 
... S_n And operate the operation signal to get information from the microcomputer
It is input to the processing unit 2 and the processing result is processed by each solenoid valve.
Renoid Sol ₁ , Sol₂ ..Sol_n , Or electric
Output to the motor switch to control.

When the key switch of the mobile agricultural machine is turned on, the control circuit is also energized, and the information processing device 2
As shown in FIG. 2, each push switch S ₁ , S ₂ ... S _n
For are set switch failure flag FG is, the push switch S _1, S ₂ ·· S _n of the failure determination 3
As shown in, the timer is turned on after the key switch is turned on.
If the timer FG is reset for several hundreds of milliseconds, for example 0.1 seconds, the timer FG and the timer T ₁ are set, and the push switches S ₁ , S _{2 ,.} If S _s is off, the switch fault FG is reset. Further, when the push switches S ₁ , S ₂ , S _n are ON, the switch failure flag FG remains set, and the information processing device 2 considers it to be OFF, and the solenoid So
l, Sol ₁ , Sol ₂ ... Sol _n will not operate due to the failure of the push switches S ₁ , S ₂ ... S _n .

FIG. 4 shows a case in which a failure is judged a number of times set by a counter, for example, once or several times, after a time set by a timer T ₂ , for example, several seconds after the push switch failure judgment is performed. So, in this method, when the key switch is turned on, it happens that the push switch is pushed by accident even though it is normal.
Alternatively, when a foreign substance is present, the information processing device 2 judges that the input is OFF and considers the input to be OFF, but since it further determines the failure after a while, it releases the push switch or turns it ON. When the push switch is turned off by removing the external force that has been applied, it is determined that it is normal.

In the example shown in FIG. 5, each push switch S
₁ , S ₂ ··· S _n are determined to be faulty, and the switch fault flag FG is reset for them, a non-control device such as a solenoid Sol ₁
Or Sol ₂ ... Is output, and when set, the solenoid valve whose output to the corresponding solenoid is stopped does not operate.

[0010]

According to the present invention, a plurality of switches S ₁ , S ₂
.. In the mobile agricultural machine in which the operation data of S _n is input to the information processing device 2 and the processing result is output to each controlled device, when the key switch is turned on, the switch S
_{When 1} , S ₂ ... S _n are ON, it is considered as a failure and the input data of the switches S ₁ , S ₂ ... S _n are turned OFF, or the failed push Since the output corresponding to the switch is stopped, when the switch is out of order, it is safe because the key switch is turned on and the non-control unit does not operate abruptly without control operation.

[Brief description of drawings]

FIG. 1 is a system diagram.

FIG. 2 is a main flow.

FIG. 3 is a switch failure determination subroutine.

FIG. 4 is another switch failure subroutine.

FIG. 5 is yet another switch failure subroutine.

[Explanation of symbols]

2 Information processing device S ₁ push switch S ₂ push switch S _n push switch Sol ₁ solenoid Sol ₂ solenoid Sol _n solenoid

Claims (2)

[Claims] 1. A mobile agricultural machine in which operation data of a plurality of switches S ₁ , S ₂ ... S _n is input to an information processing device 2 and a processing result is output to each controlled device. When turned on, the switches S ₁ , S ₂ ...
A fault diagnosis system in a mobile agricultural machine, characterized in that when S _n is ON, it is regarded as a fault and the input data of switches S ₁ , S ₂ ... S _n are turned OFF. 2. In a mobile agricultural machine in which operation data of a plurality of switches is input to an information processing device and processing results are output to each controlled device, the switches are turned on when a key switch is turned on. If so, it is regarded as a failure, and the output corresponding to the failed switch is stopped, and the failure diagnosis system for a mobile agricultural machine according to claim 1.