Multi-view whole-surface detecting device aiming at overcoming characteristics of high curvature and strong reflection of train wheels

Abstract

The invention provides a multi-view whole-surface detecting device aiming at overcoming the characteristics of high curvature and strong reflection of train wheels. The multi-view whole-surface detecting device disclosed by the invention has the advantages that uniform lighting can be carried out on the surfaces of the train wheels, so that the problem of strong reflection of the surfaces of the wheels is solved and acquired images are clear and reliable; by adoption of a large-scene-depth industrial camera, the characteristic of change of high curvature of the surfaces of the wheels is overcome; the camera can be used for acquiring whole-surface images of the wheels by virtue of a camera rotating device; high-speed parallel transmission of the acquired images is realized by building a kilomega-network transmission system; and the images are detected, processed and displayed in real time by an industrial control computer, so that full automation and intelligentization of the detection are realized, the labor cost is reduced and the production efficiency is improved. By adoption of the multi-view whole-surface detecting device, the defects of a traditional detection method are overcome, the detection accuracy is improved and the quality of a product is improved.

Description

technical field [0001] The invention belongs to the technical field of detection of defects on the entire surface of train wheels, in particular to a multi-eye full-surface detection device aimed at the high curvature and strong reflection characteristics of train wheels. Background technique [0002] The rapid development of motor vehicles, high-speed rail, subway and other industries has put forward strict requirements on the production quality of train wheels. High-quality train wheels are an important guarantee for the safe operation of trains and the safety of life and property. At present, the detection of train wheels in my country mainly relies on naked eye detection, which has a large labor load, low detection accuracy and high cost. [0003] Aiming at such problems, a lot of research has been done at home and abroad, such as magnetic particle inspection, ultrasonic inspection, machine vision inspection, etc. have been proposed and applied one after another. The us...

AI Technical Summary

Problems solved by technology

The use of magnetic particle flaw detection has a large excitation current, low safety, and the need to demagnetize and clean the workpiece. At the same time, the results of magnetic particle flaw detection still need manual intervention to judge, so there are problems such as missed detection and misjudgment.

Ultrasonic testing also has the phenomenon of material microstructure scattering, which leads to the similar frequency of interference signals and defect signals, making it impossible to distinguish defects

Compared with other detection methods, machine vision for defect detection of train wheels has high efficiency and low cost. However, at this stage, the detection system based on machine vision technology is mainly for the tread of train wheels, but not for the entire surface of train wheels. Automatic detection device, the main reason is that it is difficult to overcome the strong reflection of the metal surface, the large curvature of the surface of the train wheel, and the large change in depth of field.

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