Motor Angle Sensor Motion History Logging for Fault Analysis
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Solution Overview
Problem
Current motor control systems require analyzing the larger robot control apparatus to diagnose abnormalities in angle sensors, leading to increased transport costs and reduced flexibility due to the need for larger and more complex analysis setups.
Innovation Solution
A motor control angle sensor system with an arithmetic processing unit that generates and stores position information data based on sensor signals, including a motion history temporary memory unit for storing data temporarily and a motion history storage unit for permanent storage, allowing for analysis of abnormalities without the need for extensive robot control apparatus analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the robot control apparatus analyzes abnormalities in the angle sensor, then the abnormality can be detected, but the transport cost increases and flexibility decreases due to the larger size of the robot control apparatus
Solution Approach 1:
The patent extracts the motion history storage function from the robot control apparatus and places it directly in the angle sensor. The angle sensor now contains a motion history temporary memory unit and a motion history storage unit that independently store position information data, allowing abnormality analysis to be performed on the compact angle sensor itself rather than requiring the entire robot control apparatus.
2Loss of information
If the robot control apparatus stores motion history data, then abnormality analysis is possible, but the cost and complexity increase
Solution Approach 1:
The angle sensor performs self-service by storing its own motion history data locally. The arithmetic processing unit in the angle sensor generates position information data and stores it in the motion history temporary memory unit and motion history storage unit without requiring external storage resources from the robot control apparatus, thereby reducing overall system cost while maintaining data retention capability.
Data Source
AI summary
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.