Method for automatically identifying reading of pointer type pressure meter

Abstract

The invention discloses a method for automatically identifying reading of a pointer type pressure meter, comprising steps of collecting a pressure meter dial image through an industrial camera, performing pre-processing on the image, enhancing the image contrast, reducing noise, improving the accuracy of automatic identification by the pressure meter in the later stage, performing segmentation on the dial zone, enabling each zone to correspond to the main scale reading; determining the position condition of the pointer between the scale lines;and separately calculating the main scale, the subdivision scale and the pointer line position reading so as to obtain the final reading of the pointer. The method is simple in algorithm principle, good in robustness and high in identification accuracy and can be widely applied in the instrument calibration technology.

Description

technical field [0001] The invention relates to the technical field of instrument verification, in particular to an automatic identification method for pointer pressure gauge readings. Background technique [0002] The pressure gauge is an instrument that uses elastic elements as sensitive elements to measure and indicate pressure higher than the environment. As a measuring instrument, it has been widely used in industrial and agricultural production and scientific research fields, and has been included in the national compulsory verification catalog. Pointer pressure gauges are one of the most commonly used pressure measuring instruments in the production process at present, with a wide variety and a huge quantity. In the standard metrology department and maintenance department, it is often necessary to calibrate the instrument during the manufacturing process. For decades, the industry has generally adopted a tedious manual instrument verification method to calibrate the i...

AI Technical Summary

Problems solved by technology

The principle of this method is simple, but it needs to accurately locate the center position of the disc and extract the outline of the scale line first. The accuracy is not high in the actual operation process, and the accuracy of the dial pointer extraction has a great influence on the accuracy of the reading.

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