Roll grinding surface defect detection system and detection method thereof

Abstract

The invention discloses a roll grinding surface defect detection system and a detection method thereof. The detection system comprises a structured light projector, an imaging device, a data transmission module, and an image processing and analysis system, wherein the structured light projector can project a structured light pattern having a certain shape to a surface of a roll to be measured; the imaging device can image the pattern reflected by the surface of the roll; the imaging device transmits a signal to the image processing and analysis system by the data transmission module; the image processing and analysis system can compare received image information with prestored standard image information, analyze and output a detection result. The detection method comprises the following steps: firstly, calibrating the imaging device; then, determining parameters of the structured light projector and the imaging device, and adjusting according to the parameters; operating the system and measurement software, and then finely adjusting, so that the reflected image is clear and is located at the center of a photographed image; finally, detecting and analyzing different regions on the surface of the roll to obtain a measurement result. The detection efficiency and accuracy are high.

Description

technical field [0001] The invention belongs to the field of grinding surface defect detection, in particular to a roll grinding surface defect detection system based on structured light reflection. Background technique [0002] Spots, anilox patterns, spiral patterns, etc. are the common forms of surface defects in roll grinding, and are also an important indicator to determine the quality and stability of roll grinding. At present, the automatic detection methods such as eddy current flaw detection and ultrasonic flaw detection used in roll grinders cannot effectively detect such defects. The detection is mainly performed by experienced grinders from a specific angle under suitable lighting conditions. Visual observation of the surface of the roll to judge. This manual visual inspection method requires high worker experience and is highly subjective in judgment. Due to the limitations of the manual visual inspection method, it can only qualitatively observe and evaluate ...

AI Technical Summary

Problems solved by technology

At present, automatic detection methods such as eddy current flaw detection and ultrasonic flaw detection used in roll grinders cannot effectively detect such defects. The detection is mainly performed by experienced grinders from a specific angle under suitable lighting conditions. Visual observation of the roll surface And then judge

This manual visual detection method requires high experience of workers, and the judgment is highly subjective. It is difficult to realize the effective detection of the entire roll surface of the roll, and the detection efficiency and accuracy are low.

Due to the limitations of the manual visual inspection method, it can only observe and evaluate the grinding quality and defects of the roll surface qualitatively, but cannot realize quantitative measurement and evaluation; and due to the subjectivity of the observation method, the observation has certain randomness, and it is difficult Form a unified observation standard

At present, in the industry, the surface of the roll or rolled product is also treated by means of grinding, so that the contrast of defect features can be enhanced to improve the accuracy of manual observation. However, the detection effect of these methods is limited, and the detection efficiency is further reduced. The final evaluation still needs It is carried out by manual observation, so that it cannot get rid of the limitations of the naked eye detection method

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