Out-of-squareness detection method and system based on machine vision

Abstract

The invention provides an out-of-squareness detection method and system based on machine vision. The method comprises the following steps that: three-dimensional visual equipment is arranged at the end part of a furnace entering roller way, a steel billet positioned on the furnace entering roller way is shot through the three-dimensional visual equipment, so that a steel billet end surface image is obtained, three-dimensional point cloud data is determined from the steel billet end surface image, and the pose of the steel billet is determined according to a plurality of ridges screened from the three-dimensional point cloud data; if the steel billet is in a normal pose, an included angle between the two intersected ridges is determined according to the three-dimensional point cloud data ofthe point cloud in any two intersected ridges; and if the included angles all conform to a first preset angle range, the steel billet is determined to be a qualified billet. Compared with a method for manually detecting an out-of-square billet in the prior art, the method has the advantages that: the out-of-square billet is detected through the machine vision technology; the recognized out-of-square billet is automatically removed; the labor intensity of workers is reduced; existing potential safety hazards are reduced; the detection accuracy of the out-of-square billet is improved.

Description

technical field [0001] The present application relates to the field of billet detection, in particular to a machine vision-based method and system for detecting square off. Background technique [0002] The steel rolling heating furnace occupies an important position in the iron and steel enterprises. Its task is to heat the steel slab so that the temperature and temperature distribution of the steel slab meet the rolling requirements. The feeding device of the heating furnace is a device for transporting the billet to the heating furnace. It is mainly composed of a feeding platform, a steel retaining hook, a steel fork and a conveying roller table. In the feeding blank, the square and rectangular steel billets evolve into a parallelogram, trapezoid or rhombus due to the four corners not forming 90°, which is called off-square billet. Billet stripping is always an important hidden danger affecting the heating and production of the heating furnace. Every year, accidents suc...

AI Technical Summary

Problems solved by technology

[0004] This application provides a machine vision-based method and system for square billet detection, which can be used to solve the technical problem that manual detection of square billets in the prior art can easily lead to operational errors and lead to failures in the rolling process

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