Circular saw blade wear amount online measurement method based on machine vision

Abstract

The invention discloses a circular saw blade wear amount online measurement method based on machine vision. The measurement method is based on a measurement device which comprises an industrial camera, an image acquisition card and an industrial control computer. The measurement method comprises the steps that the image acquisition card is triggered by the industrial control computer, and a circular saw blade image is obtained through the industrial camera; preprocessing and binary processing are performed on the image; the single pixel edges of the circular saw blade image are extracted; the straight line segments of the circular saw blade edges are extracted; the two line segments on the same saw tooth are determined; and front knife face cutting edge wear amount and rear knife face cutting edge wear amount of the circular saw blade are solved. The circular saw blade wear amount online measurement method is great in real-time performance and high in detection precision and is the effective circular saw blade wear amount online measurement method, and the reliable basis is provided for compensation of a compensation mechanism by the detection result so that plate material cutting efficiency and quality can be enhanced.

Description

technical field [0001] The invention belongs to the technical field of image processing, and relates to a method for visually detecting the wear state of a tool, and more specifically, relates to an online measurement method for the amount of wear of a circular saw blade. The method extracts the edge of the circular saw blade image, detects the rake face line segment and the flank face line segment of the saw teeth of the circular saw blade, and then calculates the wear amount of the circular saw blade. Background technique [0002] Tool wear monitoring technology can be divided into indirect method and direct method from the measurement means. The direct method is a method to determine the wear state of the tool according to the relevant calibration relationship by measuring the change of the shape, quality or position of the tool edge. The indirect method is to determine the tool wear state according to the relevant calibration relationship by measuring the change of one ...

AI Technical Summary

Problems solved by technology

Based on the optimization of circular saw blade profile, this method proposes an improved quadratic polynomial interpolation sub-pixel positioning method for the inner circular hole of the circular saw blade, and uses the improved least squares method to fit the two straight lines of the tooth tip, which improves the detection efficiency. Accuracy, but this method must obtain the entire image of the circular saw blade, so the online measurement of the wear amount of the circular saw blade cannot be realized

Swedish Ekevad et al constructed the relationship between the wear amount of the circular saw blade and the vibration signal of the saw blade in the process of sawing beech. It is difficult to find the exact quantitative relationship of the vibration signal of the saw blade, and only the qualitative detection of the wear amount of the circular saw blade can be carried out

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