A signal processing method for non-contact detection of rotating body

Abstract

The invention provides a signal processing method which is used for the online non-contact detection of a rotating body. According to the method, matrix signals of the surface outline of the rotating body, which are acquired by an optical sensor, undergo a series of processing steps and are converted into the geometric parameters of the surface outline of the rotating body. The steps of signal processing mainly comprise value mapping, target positioning, noise reduction, edge tracking, binaryzation, shape recognition, coordinate calibration and parameter fitting, and the geometric parameters to be detected are acquired. The converted geometric parameters comprise arc radius, a center coordinate, a straight line angle and a straight line angle vertex coordinate. The geometric parameters and standard data are compared, and whether a detected object is qualified is determined.

Description

technical field [0001] The invention belongs to the field of computer signal processing, and in particular relates to computer analysis and processing of the contour signal of a rotating body, so as to achieve the purpose of measuring the geometric parameters of the contour of the rotating body. Background technique [0002] Rotating parts are widely used in wheels, shafts, shells and other components in construction machinery, automobiles, ships, aerospace, weapons and other industries. Its main feature is that a basic contour rotates around a fixed axis. In many applications, there are relatively strict requirements on the external dimensions of rotating bodies. At present, the measurement of rotating bodies in industry is mainly through manual caliper measurement and profiler measurement. The manual caliper measurement method can only measure a certain point on a contour line, and it is easy to be inaccurate for places that are not easy to clamp; the contour meter can per...

AI Technical Summary

Problems solved by technology

The manual caliper measurement method can only measure a certain point on a contour line, and it is easy to be inaccurate for places that are not easy to clamp; the contour meter can perform continuous measurement on a contour line, but it has slow measurement speed, Disadvantages such as expensive measuring instruments and contact measurement must be used

In the existing non-contact measurement technology, most of them are aimed at the qualitative detection of product defects. In the measurement of the outline dimension, there are problems such as large error, slow detection speed and poor stability.

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