JP2000099133A - Method and device for checking output of on-vehicle control computer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the position of a hydraulic cam rotating motor from being deviated before and after a check by outputting a check signal in either forward or backward direction, which is not locked, to the hydraulic cam rotating motor. SOLUTION: As for the output check of an on-vehicle control computer 10, the check signal is outputted to various on-vehicle actuators including a hydraulic cam rotating motor 26, and the operation of these various actuators is confimed thereby judging whether the check signal is normally outputted from the control computer 10 or not. In this case, a potentiometer 14 for detecting the operating positions of the hydraulic cam rotating motor 26 or various actuators including the hydraulic cam rotating motor 26 is attached, any forward or backward direction, which is not locked, of the hydraulic cam rotating motor 26 is determined based on this detected value and the check signal is outputted from unlocked direction to the hydraulic cam rotating motor 26 so as to operate it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for checking the output of a vehicle-mounted control computer, and more particularly to a method and a device for checking whether or not the output of the control computer itself is normally output.

[0002]

2. Description of the Related Art In addition to a general control function, a control computer mounted on a riding rice transplanter or the like has special functions such as a switch input to a microcomputer and a unit failure of a sensor.
In addition to an input check function that can easily check for connector disconnection, contact failure, etc., it has an output check function that checks whether the output of the microcomputer itself is output normally.From the microcomputer to various actuators such as motors and solenoids A check signal is output to check whether the check signals are output normally by confirming the operation of these various actuators. In order to operate these functions, when the dedicated input check switch is turned on, the output is automatically checked, and after the output check is completed, the input is automatically checked.

[0003]

However, when it is assumed that an electric motor is connected to the load side of the control system when the output is checked by the conventional means, the motor may be driven in either the forward or reverse direction. By rotating in the direction, the mechanism driven by the motor may be locked.

For example, when a driving side gear attached to an output shaft of the motor is meshed with a driven side gear, and the driven side gear is arranged so as to be swingable about a rotation fulcrum to transmit power. In consideration of this, the motor is controlled to be stopped near the right and left ends of the swing range of the driven gear, but in such a state, if the output check of the on-board control computer is performed at random, the The motor is driven beyond the swing range, and as a result, the driven gear and the driving gear are locked.

Further, even if the swing range of the driven gear has some allowance, the movable member connected to the subsequent stage of the driven gear contacts with the body frame and peripheral members.
This may cause interference and lock the motor as a result. In this case, even though the motor can rotate in one direction, it cannot be locked and rotated in the other direction.

If a check signal is forcibly output to the motor in the locked direction, the motor is not driven in the locked direction.
Since the motor can be driven in the opposite direction, there is a possibility that the motor will be displaced before and after the output check.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide an electric motor as a variety of actuators connected to a load side. A check signal is output from one of the directions that does not lock to prevent displacement before and after the check, and various components are protected from electrical and mechanical stress caused by the lock to improve durability. An object of the present invention is to provide a method and an apparatus for checking the output of a control computer.

[0008]

According to the first aspect of the present invention, a check signal is output to various on-vehicle actuators including an electric motor (26) to confirm the operation of the various actuators. Thus, in the output checking method of the on-vehicle control computer (10) for determining whether or not the check signal is normally output, the electric motor (26) is moved in the forward / reverse direction with respect to the electric motor (26). Wherein the check signal is output so as to be operable from any of the directions in which the lock is not performed.

According to a second aspect of the present invention, a check signal is output to various on-vehicle actuators including the electric motor (26) based on the operation of a predetermined switch (40) to confirm the operation of the various actuators. The output position of the electric motor (26) or various actuators including the electric motor (26) can be determined by the output check device of the on-vehicle control computer (10) that determines whether the check signal is output normally. Detection means (14) for detecting the direction of rotation of the electric motor (26) based on the value detected by the detection means (14). Output.

[Operation] Based on the above-mentioned invention specific matter, in the output check of the on-vehicle control computer (10), a check signal is output to various on-vehicle actuators including the electric motor (26), and based on this check signal, Thus, it is determined whether or not the check signal is normally output by confirming that various actuators operate. In this case, the electric motor (2
6) or detecting means (14) for detecting the operating positions of various actuators including the electric motor (26);
Based on the value detected by the detecting means (14), the value detected at this time is compared with a value stored in advance by the control computer (10), and the electric motor (26) is driven in one of the forward and reverse directions. A direction in which locking is not performed is determined, and a check signal is output so as to be operable from the direction in which locking is not performed.

Note that the reference numerals in parentheses described above are shown for reference to the drawings, and do not limit the invention specifying matter of the present invention at all.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a control block diagram of a riding rice transplanter to which the present invention is applied.

In FIG. 1, the hand operation lever 12 is electrically connected to a cam rotation motor 26 via a control unit 10. When the hand operation lever 12 is operated in the up / down and front / rear directions, the operation position is changed. The cam rotation motor 26 is operated by the control signal from the switch 12a, and the hydraulic cam 27 is rotated.
By the rotation of the hydraulic cam 27, the planting portion (not shown) is controlled to move up and down by a hydraulic cylinder device via a hydraulic control valve (not shown).

The control unit 10 includes a hydraulic cam potentiometer 14 for detecting the position of the hydraulic cam 27,
A lever position potentiometer 16 for detecting an operation position of a hydraulic / planting lever (not shown), a horn switch 18,
Signals from the planting switch 20, the back switch 22, the seedling warning switch 24, and the like that activate various monitors and an alarm buzzer are input. If there is any abnormality in the control system, the seedling supply monitor lamp 28 and the planting monitor lamp 30 are turned on, or the buzzer 32 and the horn 34 sound for a certain period of time.

Next, an output check function as a special function of the control unit 10 will be described.

This output check function outputs a check signal to various actuators such as the cam rotation motor 26 and the solenoid mounted on the vehicle, and confirms that the various actuators operate normally. Then, it is determined whether or not a normal check signal is output from 10.

To perform this output check, for example, by turning on a dedicated input check switch 40,
The output is automatically checked. If the check signal is normal, for example, the lamp is lit or the horn emits a single tone. If there is a problem, the lamp is blinked or the horn intermittently sounds for a certain period of time.

In the present invention, when the electric motor 26 as various actuators is connected to the load side,
A check signal is output to the electric motor 26 so that the electric motor 26 can operate in either the forward or reverse direction in which the electric motor 26 is not locked.

For this purpose, in this embodiment, a hydraulic cam potentiometer 14 is provided as detecting means for detecting the operating position of the cam rotation motor 26 or various actuators including the cam rotation motor 26, On the basis of the detection value of the hydraulic cam potentiometer 14, one of the forward and reverse directions of the cam rotation motor 26 which is not locked is determined, and a check signal is output from the unlocked direction.

FIG. 2 shows a state in which a hydraulic cam 27 arranged swingably around a fulcrum shaft 38 is engaged with a gear 36 attached to an output shaft 26a of the cam rotation motor 26. I have. At this time, the hydraulic cam 27 is stopped at one end of the swingable range, and if the cam rotation motor 26 is rotated clockwise (A direction) from this state, the hydraulic cam 27 is It can be swung counterclockwise about the fulcrum shaft 38 to move to the C position. However, when the cam rotation motor 26 is to be rotated in the counterclockwise direction (B direction) from the state shown in the figure, the hydraulic cam 27 is in contact with the lock member 42 and cannot be further rotated.

Therefore, when the cam rotation motor 26 is at the position as shown in FIG. 2, the control unit 10 first outputs a check signal to the cam rotation motor 26 so as to be rotatable in the A direction. After the operation check in the direction is completed, a check signal is output in the B direction.

The direction in which the cam rotation motor 26 is not locked is determined based on the detection value of the hydraulic cam potentiometer 14. That is, the hydraulic cam potentiometer 14
Although the current position of the hydraulic cam 27 is detected, the detected value at this time is compared with a value stored in advance in the control unit 10, whereby the forward / reverse direction of the cam rotation motor 26 is determined. Direction is determined.

In the present embodiment, the hydraulic cam potentiometer 14 detects the position of the hydraulic cam 27 as a mechanism driven by a cam rotation motor 26. The position of the output shaft 26a itself may be detected.

Next, a specific example of the output check of the microcomputer will be described with reference to the control flowchart of FIG.

In S10, it is determined whether or not the pause timer for output check is 0. If the timer is not 0, the process returns to the beginning to check the output. If the timer is 0, whether or not the direction flag is set in S11 is checked. Judge.
In this S11, if the direction flag is not set, the process proceeds to S24 described later, and if the direction flag is set, the process proceeds to S12. In this step S12, the setting direction (large direction or small direction) of the direction flag is determined, and if the direction flag is set in the small direction, the process proceeds to S27 described below to check the output in the small direction. For example, the process proceeds to S13 to check the output in the large direction.

The output check in the large direction will be described first.

In S13, it is determined whether or not the output check in the large direction has been completed. If the check has been completed, the process returns to the beginning. If not, whether the check signal is being output in the large direction in S14. Determine whether or not. If
If the check signal is not being output in the large direction, S1
At 5, the output timer is started, and the process proceeds to S16.
If a check signal is being output in the large direction, directly S1
Proceed to 6.

In S16, it is determined whether the output timer is 0 or not. If the output timer is not 0, a check signal is output in the large direction in S18. If the output timer is 0
If so, the output of the check signal in the large direction is stopped in S17, and the process proceeds to S19. In this S19, it is determined whether or not there is an abnormality. If there is an abnormality, error processing is performed in S21,
If there is no abnormality, the output check in the large direction is finished, the pause timer is started, and the direction flag is set in the small direction (S20, S22, S23).

Next, if the direction flag is not set in S11, it is determined in S24 where the current value of the hydraulic cam potentiometer 14 is. That is, based on the current value of the hydraulic cam potentiometer 14, the direction in which the electric motor 26 does not lock in either the forward or reverse direction (large direction or small direction) is determined. If the current value of the potentiometer 14 is small in S24, the direction flag is set to the opposite large direction in S25, and the process proceeds to S13 described above. If the current value of the potentiometer 14 is large, the direction is changed in S26. The flag is set in the opposite small direction, and the flow proceeds to S27.

Hereinafter, the output check in the small direction will be described.

In S27, it is determined whether or not the output check in the small direction has been completed. If the check has been completed, the process returns to the beginning. If not, whether or not the check signal has been output in the small direction in S28. Judge. If the check signal is not being output in the small direction, the output timer is started in S29 and the process proceeds to S30. If the check signal is being output in the small direction, the process directly proceeds to S30.

At S30, it is determined whether or not the output timer is 0. If the output timer is not 0, a check signal is output in the small direction at S31 and the process returns to the beginning. Is stopped and the process proceeds to S33.
In this S33, it is determined whether or not there is any abnormality. If there is an abnormality, error processing is performed in S34. If there is no abnormality, the output check in the small direction is terminated, the pause timer is started, and the direction flag is further set. Is set in the large direction (S35, S
36, S37).

[0034]

As described above, according to the first aspect of the present invention, when the electric motor is connected to the load side,
By outputting the check signal to the electric motor from either the forward or reverse direction in which the motor is not locked, for example, the electric motor is operated by the same amount in the forward and reverse directions to shift the position of the electric motor before and after the check. Can be prevented. In addition, various components can be protected from mechanical stress caused by locking of the electric motor, and stress can be prevented from being caused by a lock current, thereby improving the durability of the battery.

According to the second aspect of the present invention, since the detecting means for detecting the current position in the rotational direction of the electric motor is provided, the electric motor is compared with a value stored in advance based on the value detected by the detecting means. It is possible to determine either the forward or reverse direction of the motor and the direction in which the motor is not locked.

[Brief description of the drawings]

FIG. 1 is a control block diagram of a vehicle-mounted control computer according to the present embodiment.

FIG. 2 is a diagram illustrating a meshing state between a gear fixed to a motor shaft and a hydraulic cam.

FIG. 3 is a diagram showing a control flowchart in the present embodiment.

[Explanation of symbols]

 Reference Signs List 10 control unit 12 hand operation lever 14 hydraulic cam potentiometer 26 hydraulic cam rotation motor 26a output shaft 27 hydraulic cam 36 gear 38 fulcrum shaft

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Chie Mizutani 667, Iya-cho, Higashi-Izumo-cho, Yatsuka-gun, Shimane 1 F term in Mitsubishi Agricultural Machinery Co., Ltd. (Reference) 2B062 AA03 AB01 CA05 CA30 5H223 AA10 AA17 CC08 DD03 EE05 EE17

Claims (2)

[Claims] 1. An in-vehicle control computer that outputs a check signal to various on-vehicle actuators including an electric motor and confirms the operation of the various actuators to determine whether or not the check signal is normally output. The output check method according to any one of claims 1 to 3, further comprising: outputting a check signal to the electric motor so that the electric motor can be operated from one of forward and reverse directions in which the electric motor is not locked. . 2. A check signal is output to various in-vehicle actuators including an electric motor based on a predetermined switch operation, and by confirming the operation of the various actuators, whether the check signal is normally output is determined. An output check device of the on-vehicle control computer for determining whether or not the electric motor or various actuators including the electric motor are provided with detection means, and based on a value detected by the detection means, whether the electric motor is normal or reverse. An output check device for an in-vehicle control computer, wherein one of the directions is determined to be unlocked, and a check signal is output from the unlocked direction.