Device and method for identifying surface defects of metal wire

Abstract

The invention discloses a device and a method for identifying surface defects of a metal wire. The device comprises a cavity and a labeling unit, wherein the cavity is connected with a control terminal, and the two ends of the cavity are closed. A group of image acquisition units are arranged on the inner wall of the cavity at intervals, a first through hole is formed in one end face of the cavity, a second through hole is formed in the other end face of the cavity, a metal wire enters the cavity through the first through hole and penetrates out of the cavity through the second through hole, the labeling unit is located near the second through hole through which the metal wire penetrates out of the cavity, and the image acquisition units arranged on the inner wall of the cavity are connected with a control terminal. The method comprises the steps of: (1) image acquisition; (2) target positioning; (3) ROI (Region of Interest) extraction; (4) image normalization; (5) defect detection; and (6) result output. The device has the advantages that the cost is low, the practicability is good, and the networking is easy. The method is convenient to operate, and can improve the recognition efficiency and the recognition accuracy, reduce the labor intensity of workers and reduce the production cost.

Description

Technical field [0001] The invention relates to the field of machine vision, in particular to a device and a method for identifying surface defects of metal wires. Background technique [0002] With the development of science and technology and technological innovation, metal wire has been widely used in many fields. During the production and use of metal wire, due to factors such as uneven force, various defects on the surface of metal wire, such as rolling Dimples, crushing, and sawtooth defects are produced during the process; the metal wire is scratched and peeled during the transfer process; the surface blisters due to excessive temperature, or there is water and oil stains on the surface, etc., such metal wire will cause long-term use It causes the further deepening and expansion of defects. If the surface defects of the metal wire are not detected in time, the reliability and safety of the metal wire will produce hidden dangers, which will cause huge safety accidents in se...

AI Technical Summary

Problems solved by technology

[0003] The traditional manual visual detection method for surface defects of metal wire has problems such as high labor cost, limited by subjective evaluation factors, too small defects to be identified, and low sampling coverage. The sharp part is easy to scratch, and such long-term inspection operation is likely to cause occupational diseases, such as cervical spondylosis, vision loss and other disadvantages, and in the high-temperature, high-speed production environment, manual quality inspection cannot meet the needs

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