Optical detection system for defects of billet and detection method thereof

Abstract

The invention relates to an optical detection system for defects of a billet and a detection method of the system. The detection system comprises a plurality of first matrix image acquiring devices, a plurality of second matrix image acquiring devices, a linear image acquiring device, a plurality of projection light sources, and an image data processing device, wherein the plurality of first matrix image acquiring devices respectively face four surfaces of one billet, the plurality of second matrix image acquiring devices respectively face a first corner, a second corner and a third corner of the billet, the linear image acquiring device faces a fourth corner of the billet, the plurality of projection light sources are respectively arranged at the corresponding positions of the corners of the billet, the image data processing device is used for judging whether each image has a defect or the types of the defects according to the images obtained by the plurality of first matrix image acquiring devices, the plurality of second matrix image acquiring devices and the linear image acquiring device and a set decision rule. Therefore, the defects of the surfaces and defects of the corners of the long edge of the billet can be simultaneously detected.

Description

technical field [0001] The invention relates to a defect detection system and a detection method thereof, in particular to a steel billet defect optical detection system and a detection method thereof. Background technique [0002] Steel billet defect detection is the most important technical means to judge the stability of steel billet manufacturing process and the characteristics of steel grade. However, most of the known steel billet defect detection systems and detection methods can only detect defects on the surface of the steel billet, and they do not have the ability to detect the elongated defects formed in the corner area (especially the corner directly below the steel billet), resulting in The system inspection coverage is insufficient, resulting in a large number of defective steel billets with long corner defects. [0003] Therefore, it is necessary to provide an innovative and progressive steel billet defect optical detection system and detection method to solv...

AI Technical Summary

Problems solved by technology

However, most of the known steel billet defect detection systems and detection methods can only detect defects on the surface of the steel billet, and they do not have the ability to detect the elongated defects formed in the corner area (especially the corner directly below the steel billet), resulting in Insufficient system inspection coverage, resulting in a large number of defective steel billets with long corner defects

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