JP2603010B2 - Shift failure detection circuit of drive robot - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive robot for switching the position of a shift lever used for automatically performing a performance test or the like of an automobile, and more particularly to a shift failure detecting circuit thereof.

[0002]

2. Description of the Related Art FIG.
FIG. 1 is a circuit diagram partially showing a block diagram of a conventional shift failure detection circuit of a drive robot disclosed in Japanese Patent Application Laid-Open Publication No. H10-209, in which reference numeral 1 denotes a stroke control unit of the drive robot;
Is a motor that is driven and controlled by the stroke control unit 1, 3 is a rotation angle detection sensor that detects the rotation angle of the motor 2, 4 is a stroke detection unit that converts the signal of the rotation angle detection sensor 3 into a stroke amount, 5 Is a current detector for detecting the current of the motor 2, 6 is a current detector amplifier for amplifying the output of the current detector 5, 7 is a current setting device for applying a certain set current to the motor 2, 8 is a current flowing through the motor 2. A comparator for performing an on / off operation by comparing the current value with a set current value of the current setting unit 7, a timer 9 for performing a timed operation by an on signal of the comparator 8, for example, a timer relay, and 10 a shift driven by the electric motor 2 It is a lever.

Next, the operation will be described. The electric motor 2 rotates based on the stroke set value, and drives the shift lever 10. At this time, if the shift lever 10 stops before reaching the stroke set value due to some abnormality, the command current from the stroke control unit 1 increases. The current value at this time is supplied to the comparator 8 via the current detector 5 and the current detector amplifier 6, and the set value of the current setter 7 is supplied to the comparator 8, and the comparator 8 compares these signals. When the command current exceeds the set value,
The comparator 8 starts the timed operation of the timer 9. As a result, when the set time is exceeded, a shift failure is detected.

[0004]

Since the conventional shift failure detecting circuit of the drive robot is constructed as described above, the set value of the current setter 7 is determined by the acceleration force of the drive robot itself and the acceleration of the shift lever 10. It is necessary to make the current value equal to or more than the value of the force plus the driving force of the shift lever 10.
For this reason, the shift detection accuracy is poor, and an excessive force is applied to the shift lever 10 when the shift fails, and the shift lever 1
However, there is a problem that the C.O.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and there is provided a shift failure detection circuit for a drive robot which accurately detects a shift failure without fear of applying an excessive force to a shift lever. It is intended to be.

[0006]

A shift failure detecting circuit for a drive robot according to the present invention detects a current of an electric motor .
Current detector and a predetermined current set value of the motor
Current setting device, current detector and current setting device
And the detected current exceeds the predetermined current set value.
In addition to the first comparator means that performs the ON operation,
An acceleration detector for detecting the rotational acceleration of the electric motor
And an acceleration for setting a predetermined acceleration set value of the electric motor.
Setter, and these acceleration detectors and acceleration setters.
The detected acceleration reaches the predetermined acceleration set value.
And a second comparator means for performing an on operation until the operation is completed.

[0007]

According to the present invention, the shift failure is detected a predetermined time after both the first comparator means and the second comparator means are turned on.

[0008]

FIG. 1 is a circuit diagram showing an embodiment of the present invention. In FIG. 1, 1 to 8 and 10 are exactly the same as those of the conventional example, 11 is an acceleration detector operatively connected to the electric motor 2, and detects an acceleration of the electric motor 2, and 12 is an acceleration for applying a certain set acceleration to the electric motor 2. A setting unit 13 is connected to the acceleration detector 11 and the acceleration setting unit 12 and compares their outputs to perform an on / off operation. 9A is a timer for performing a timed operation by the on signals of the comparators 8 and 13, for example. It is a timer relay.

Next, the operation will be described. The electric motor 2 rotates based on the stroke set value, and drives the shift lever 10. At this time, if the operation is normal, the acceleration of the electric motor 2 becomes equal to or higher than a certain acceleration set value, and the comparator 13 is turned off. Conversely, when the operation is abnormal, the acceleration becomes equal to or less than the set value, and the comparator 13 is turned on. On the other hand, the current of the electric motor 2 is also monitored in the same manner as in the conventional example. That is, the current value of the motor 2 is supplied to the comparator 8 via the current detector 5 and the current detector amplifier 6, where it is compared with the set value of the current setter 7, and when the current value exceeds a certain set value. The comparator 8 turns on. Therefore,
The timer 9A starts the timed operation only when the acceleration of the electric motor 2 is equal to or less than a certain set value and the current value is equal to or more than a certain set value.

[0010]

As described above, the present invention provides a current detector for detecting a current of a motor and a predetermined current setting for the motor.
A current setting device for setting a constant value, these current detectors and
Connected to a current setting device, wherein the detected current is the predetermined current
First comparator means for performing an ON operation when a set value is exceeded
And an acceleration for detecting a rotational acceleration of the electric motor.
A detector and a predetermined acceleration set value of the electric motor are set.
Acceleration setting device, acceleration detector and acceleration setting
A second comparator means connected to a comparator and performing an on operation until the detected acceleration reaches the predetermined acceleration set value; and a timed operation is started by simultaneous on operation of the first comparator means and the second comparator means. Since a timer is provided for detecting a shift failure when the time is equal to or longer than the time, a current corresponding to the acceleration force of the drive robot itself and the shift lever is removed from the current set value, that is, a shift failure detection current set value is obtained. This has the effect of being able to be set low, thus improving detection accuracy and preventing damage to the shift lever.

[Brief description of the drawings]

FIG. 1 is a circuit diagram partially showing a block diagram of an embodiment of the present invention.

FIG. 2 is a circuit diagram partially showing a shift failure detection circuit of a conventional drive robot in a block diagram.

[Explanation of symbols]

 2 Motor 5 Current detector 7 Current setting device 8,13 Comparator 9A Timer 10 Shift lever 11 Acceleration detector 12 Acceleration setting device

Claims (1)

(57) [Claims] 1. A drive robot for switching the position of a shift lever used for automatically performing a performance test or the like of a vehicle by an electric motor, wherein a current of the electric motor is detected.
And a predetermined current set value of the motor.
Current setting device, current detector and current setting
A first comparator means connected to a motor for turning on when the detected current exceeds the predetermined current set value; an acceleration detector for detecting a rotational acceleration of the electric motor;
An acceleration setting device for setting a predetermined acceleration setting value of the motive;
Connected to these acceleration detector and acceleration setting device,
The timed operation is started by the second comparator means for performing the ON operation until the detected acceleration reaches the predetermined acceleration set value and the simultaneous ON operation of the first comparator means and the second comparator means. A shift failure detection circuit for a drive robot, comprising: a timer for detecting a shift failure at a time.