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A Novel Method for Measuring the Elastic Characteristics of C-type Bourdon Tube

A novel method for measuring the elastic characteristics of a C-type Bourdon tube, based on CCD imaging and image-processing technologies, is presented and demonstrated. Pasted on the Bourdon tube is a small slice, whose two straight edges are at 90 degrees, such a mark can be image-formed by use of a CCD videotape head, and its position information can be obtained using the computer-based image processing, thus the non-contact measurement of the elastic characteristics can be realized, the curve of the experimental sensitivity basically coincides with that of the theoretical sensitivity. The principle of measurement and the experimental method are simply introduced, the experimental results of the elastic characteristics and the corresponding evaluations are given, and the error sources of the measurement method are also pointed out.