Dial Instrument Calibration by both Automatic and Half-Automatic Methods

Abstract:

This paper presents a calibration system by video processing technique. The system can calibrate large number of different types of dial instruments. The system is composed of an automatic recog-nition approach and a half-automatic approach. Both the automatic calibration and half-automatic calibration include four steps: 1st, dial plane circle edge extraction and center identification; 2nd, pointer extraction; 3rd, scale start and end position identification; 4th, result reading. For half-automatic method, the 1st step and 3rd step are manually indentified. By experiments and practical application in industry, it proves that our calibration system is effective for more than hundreds of different types of dial instruments.

• Periodical: Applied Mechanics and Materials (Volumes 157-158)
• Pages: 581-588
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.157-158.581
• Online since: February 2012
• Authors: Zhen Long Bai, Xiang Li
• Keywords: Calibration System, Dial Instrument, Pointer Extraction

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