Metal can image acquisition device and acquisition method

Abstract

The invention relates to the technical field of image acquisition, and in particular, relates to a metal can image acquisition device and acquisition method based on a machine vision detection technology. The image acquisition device is arranged on a metal can production line and comprises an image acquisition unit, a control unit and a positioning unit; the image acquisition unit comprises a bracket and a camera and a light source which are arranged on the bracket; the camera and the light source are coaxially arranged, and the light source is an annular light source and is arranged below the camera; a regulating mechanism is arranged on the bracket; the control unit comprises a controller and a rotating device, and the rotating device is used for driving the camera to rotate back and forth around the camera center axis; the positioning unit comprises a position sensor and a positioning mechanism. The image acquisition device has the advantages of high defect recognition rate of a metal can, only needs one work station and one camera are required, is convenient to mount, is suitable for a complex process production environment, and has good practicability and economical efficiency.

Description

technical field [0001] The invention relates to the technical field of image acquisition, in particular to an image acquisition device and acquisition method based on machine vision detection technology. Background technique [0002] Metal cans are common containers on the market for storage of food, beverages or other items. During the production process of metal cans, the cans are prone to defects such as pits, scratches, trachoma, and dirt. At present, most factories still use the traditional manual method to detect the appearance. This detection method has many disadvantages such as high labor cost, easy missed detection and false detection, and low efficiency. As the inspection technology based on machine vision enters a new stage of rapid development in my country, product classification, measurement, and defect detection technologies are gradually applied widely, and intelligent detection of metal cans will be an inevitable trend. [0003] Image acquisition is the b...

AI Technical Summary

Problems solved by technology

Metal cans are made of various shapes and sizes. Conventional image acquisition methods and devices often have the problem of "sufficient field of view but insufficiently obvious defects" or "clear defects but insufficient field of view". Therefore, high-quality images cannot be obtained, which increases the follow-up The difficulty of image processing

China Patent No. 201310745133.7 discloses a two-stage image acquisition method for online grading and sorting of lenses. This method can be extended to improve the quality of image acquisition, but this method requires two stations, which occupies the space of the production line and improves the quality of image acquisition. cost of production

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