Pointer instrument general identification method

Abstract

The invention discloses a pointer type instrument general identification method. The method comprises the following steps: S1, obtaining a picture of a target area through data acquisition equipment;S2, selecting a standard picture to establish a priori model; S3, preprocessing data, performing morphological processing, color space transformation and size scaling operation on a to-be-identified picture; S4, performing feature point extraction on the to-be-identified picture; S5, cutting the target area map through the target position information, and correcting the target area by using a transmission transformation principle; S6, excluding instrument peripheral information by utilizing priori knowledge; S7, finding the position of a pointer and calculating the angle of the pointer; and S8, calculating the reading value of the instrument according to the prior model file. A priori model is fully utilized, the target position and the pointer angle are accurately positioned, the operation speed is high, the reading precision is high, the robustness is high, and the method can be suitable for linear scales and nonlinear scales at the same time and is not affected by the shape and therange of an instrument.

Description

technical field [0001] The invention belongs to the technical field of instrument identification, in particular to a general identification method for pointer instruments. Background technique [0002] Pointer instruments are widely used in the power plant environment, and the operating mode or operating status of electrical equipment can be reflected by the readings of the instruments. With the construction of smart power plants, electrical inspections have been improved towards remote automated operations. [0003] Pointer instruments are widely used in daily life and industrial production because of their simple structure, convenient use, and low price. In the intelligent recognition algorithm for pointer instruments in the power plant environment, due to the variety of instruments, such as the shape of the instrument is square, circular, triangular, etc., the scale of the instrument has uniform scale and non-uniform scale, and the range of the instrument is sometimes S...

AI Technical Summary

Problems solved by technology

There are many studies on the recognition algorithms of pointer meters, but their applicable environments are very limited: some are limited to the shape of the meter, such as only suitable for square meters or round meters; some are limited to the scale distribution of the meter, such as It is only suitable for linear scale or non-linear pointer instruments; some are limited to the range of the instrument, such as only suitable for range monotone distribution or segmental distribution

In short, the existing pointer instrument recognition algorithm cannot be used universally.

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