Motor control angle sensor, motor control system, and control method for motor control angle sensor
AssigneeSeiko Epson Corporation
InventorRyosuke Imai
Life of this patent
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Abstract
A motor control angle sensor includes a sensor that outputs a signal according to driving of a motor, an arithmetic processing unit, a motion history temporary memory unit, and a motion history storage unit, wherein the arithmetic processing unit generates position information data containing a position of the motor acquired based on the signal output from the sensor and a time when the position is acquired, repeats processing of storing the generated position information data in the motion history temporary memory unit, and, when an abnormality is sensed or a signal reporting an abnormality is received from an external apparatus, stores the position information data stored in the motion history temporary memory unit in the motion history storage unit.
Claims8
A motor control angle sensor assembly comprising:
- a housing;
- a sensor element housed in the housing, the sensor element being configured to output a signal according to driving of a motor, the motor having a drive shaft, the drive shaft having first and second ends opposite to each other;
- an arithmetic processor housed in the housing;
- a motion history temporary buffer housed in the housing, and
- a motion history memory housed in the housing, wherein
- the arithmetic processor is configured to:
- generate position information data containing a position of the motor acquired based on the signal output from the sensor element and a time when the position is acquired;
- repeal processing of storing the generated position information data in the motion history temporary buffer several times;
- and
- store the position information data stored in the motion history temporary buffer in the motion history memory when an abnormality is sensed or a signal reporting an abnormality is received from an external apparatus, and
- the motor control angle sensor is disposed at the first end of the drive shaft of the motor, and a robot arm is disposed at the second end of the drive shaft of the motor.
A motor control system comprising:
- a motor, the motor having a drive shaft, the drive shaft having first and second ends opposite to each other;
- a motor control angle sensor assembly, the motor control angle sensor assembly including:
- a housing;
- a sensor element housed in the housing, the sensor element being configured to output a signal according to driving of the motor;
- an arithmetic processor housed in the housing;
- a motion history temporary buffer housed in the housing;
- and
- a motion history memory housed in the housing;
- and
- a controller configured to control the driving of the motor, wherein
- the arithmetic processor is configured to:
- generate position information data containing a position of the motor acquired based on the signal output from the sensor element and a time when the position is acquired;
- repeat processing of storing the generated position information data in the motion history temporary buffer several times;
- and
- store the position information data stored in the motion history temporary buffer in the motion history memory when an abnormality is sensed or a signal reporting an abnormality is received from an external apparatus, and
- the motor control angle sensor assembly is disposed at the first end of the drive shaft of the motor, and a robot arm is disposed at the second end of the drive shaft of the motor.
A control method for a motor control system, the motor control system having:
- a motor, the motor having a drive shaft, the drive shaft having first and second ends opposite to each other;
- a motor control angle sensor assembly, the motor control angle sensor assembly including:
- a housing;
- a sensor element housed in the housing, the sensor element being configured to output a signal according to driving of the motor;
- an arithmetic processor housed in the housing;
- a motion history temporary buffer housed in the housing;
- and
- a motion history memory housed in the housing, and
- a controller configured to control the driving of the motor,
- the method comprising:
- generating position information data containing a position of the motor acquired based on the signal output from the sensor element and a time when the position is acquired at each time when receiving a request signal from the controller;
- repeating processing of storing the generated position information data in the motion history temporary buffer several times;
- and,
- when an abnormality is sensed or a signal reporting an abnormality is received from the controller, storing the position information data stored in the motion history temporary buffer in the motion history memory by the arithmetic processor,
- wherein the motor control angle sensor assembly is disposed at the first end of the drive shaft of the motor, and a robot arm is disposed at the second end of the drive shaft of the motor.
Dependencies are inferred from the claim text.