Transformer station pointer type instrument identification method based on angle step length

Abstract

The invention relates to a transformer station pointer type instrument identification method based on angle step length and belongs to the instrument identification technology field. According to the method, a Hoff gradient method is employed to extract a circular scale contour, a matching traversal point P is selected on the to-be-detected circular scale contour, a corresponding dynamic ROI of the matching traversal point P and an Hu invariant moment of the dynamic ROI are acquired, image similarity is calculated according to the Hu invariant moment of the dynamic ROI and an Hu invariant moment of a pointer template, after the largest image similarity is acquired, the position of a pointer on a to-be-detected pointer instrument image can be determined, a pointer reading corresponding to the to-be-detected pointer instrument image can be acquired according to the pointer position, a scale of the to-be-detected pointer instrument image and corresponding measuring range relations, traversal matching is carried out through employing the angle step length, plenty of irrelevant area matching searching can be avoided, traversal frequency is substantially reduced, and identification precision and reliability are improved.

Description

technical field [0001] The invention relates to an identification method, in particular to a substation pointer meter identification method based on an angle step, and belongs to the technical field of instrument identification. Background technique [0002] Safety production is the foundation of all work of power companies. With the continuous construction and development of the power grid, the number of substations is increasing day by day. It is particularly important to ensure the stable operation of the power grid in safe production. Substation operation and maintenance in the power system undertakes important tasks such as substation operation and maintenance management, switching operation and accident handling. It is the executor to ensure the safety, stability and economic operation of the power grid. In order to strengthen the safety management of substation operation and maintenance and prevent safety accidents in substations, many research institutions and compan...

AI Technical Summary

Problems solved by technology

Instrument pointer position recognition is a common application of substation image monitoring. For this, the more feasible methods at this stage include concentric ring search method, silhouette method, Hough line transformation method, etc., but these methods have disadvantages such as being easily affected by light, Due to the existence of shadows, the recognition of thicker pointers is not enough, and the difference from manual readings is large.

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