Coordinate Measuring Apparatus Abnormality Detection Between Calibrations
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Solution Overview
Problem
The accuracy of a coordinate measuring apparatus degrades if its state changes before the next calibration, necessitating early detection of abnormalities.
Innovation Solution
An abnormality determination apparatus and method that acquires position data from a standard gage, generates distance data, and determines abnormalities based on whether the measured distances fall within an appropriate range, using a determination part to output results associated with apparatus identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If calibration is performed periodically to maintain measurement accuracy, then measurement accuracy is maintained over time, but abnormalities cannot be detected early between calibration periods
Solution Approach 1:
The system performs preliminary abnormality detection by measuring positions of reference points on the measurement object before formal calibration is due. This preliminary action identifies potential abnormalities early, allowing intervention before measurement accuracy degrades beyond acceptable thresholds.
Solution Approach 2:
The system continuously monitors measurement data and compares it against reference values to provide feedback on apparatus state. When deviations exceed predetermined thresholds, the system alerts operators to potential abnormalities, creating a closed-loop feedback mechanism that maintains reliability between calibration periods.
2Device complexity
If no continuous monitoring is implemented, then the system remains simple and calibration is sufficient, but measurement accuracy degrades undetected between calibrations
Solution Approach 1:
The coordinate measuring apparatus performs self-diagnosis by automatically measuring reference points and comparing results against stored reference values. This self-service capability detects abnormalities without requiring external monitoring systems, maintaining relative simplicity while ensuring measurement accuracy.
Solution Approach 2:
The system monitors changes in measurement parameters (positions of reference points) over time. By tracking parameter deviations from reference values and comparing them against predetermined thresholds, the system detects abnormalities through parameter change analysis rather than requiring complex continuous monitoring infrastructure.
Data Source
AI summary
An abnormality determination apparatus includes a data acquisition part that acquires position data indicating a plurality of positions to be measured of a standard gage used in a coordinate measuring apparatus, in association with apparatus identification information for identifying the coordinate measuring apparatus, a generation part that generates distance data indicating a distance to be measured that is a distance between the plurality of positions to be measured indicated by the position data, a storage that stores an appropriate range in which the distance data is determined to be appropriate, and a determination part that determines whether there is an abnormality in the coordinate measuring apparatus on the basis of whether or not the distance to be measured indicated by the distance data is included in the appropriate range, and outputs a determination result in association with the apparatus identification information.