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Metal surface defect detection system based on machine vision

A defect detection and metal surface technology, applied in the direction of optical defect/defect test, instrument, measuring device, etc., can solve problems affecting processing quality, product performance, low efficiency, etc., to optimize image processing algorithms, facilitate integration and retention , the effect of high detection stability

Pending Publication Date: 2021-08-10
宝鸡高新智能制造技术有限公司
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  • Summary
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  • Claims
  • Application Information

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Problems solved by technology

[0002] During the heating or forging process of metal forgings, due to excessive heating speed, thermal stress, uneven deformation or internal defects, etc., crack defects appear in forgings. Some forging defects will affect the processing quality of subsequent processes, and some are serious. Affect the performance of forgings, reduce the service life of manufactured parts, and even endanger safety
At the same time, during high-temperature processing of metal alloys, impurities such as metal oxides will be produced in the surface gap defect area, which will affect product performance.
[0003] In the existing technology, the commonly used methods for removing metal oxides are pickling and mechanical grinding. Pickling is easy to cause harm to people and the environment. Mechanical grinding requires manual identification of defects, which has a high false detection rate and high labor intensity. and less efficient

Method used

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  • Metal surface defect detection system based on machine vision
  • Metal surface defect detection system based on machine vision
  • Metal surface defect detection system based on machine vision

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Effect test

Embodiment 1

[0036] see Figure 1-3 , a metal surface defect detection system based on machine vision, including a motion control system, an optical imaging system, and an image processing system, and the motion control system, the optical imaging system, and the image processing system all communicate with the industrial computer 8 through respective corresponding communication protocols make a communication connection;

[0037] The motion control system includes a three-dimensional object loading platform 9, the three-dimensional object loading platform 9 adopts a gantry-type three-dimensional motion structure, and the motion control system is used for placing metal to detect defects on the metal surface;

[0038] see Figure 4-6 , the optical imaging system includes a base 1, the base 1 is arranged on the frame of the three-dimensional object loading platform, an area array industrial camera 2 and an optical lens 3 are installed on the surface of the base 1, the area array Two special...

Embodiment 2

[0051] Adopt a kind of metal surface defect detection system based on machine vision described in embodiment one to carry out test operation, such as Figure 7 As shown, the optical imaging system and the motion control system are connected to the industrial computer through the corresponding communication protocol. Its function is to image the surface features of the product on the camera sensor through the optical lens under the illumination of the light source, and convert the optical signal into an electrical signal, and then convert it to Complete the collection of product surface images for digital signals that can be recognized and processed by computers. The image processing system mainly involves image denoising, image enhancement and restoration, defect detection and comparison, and target segmentation for the collected images. Through the above method, the expression amount of the target feature can be described by extracting the image pixels, and the difference bet...

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Abstract

The invention discloses a metal surface defect detection system based on machine vision, and belongs to the technical field of metal machining and manufacturing. The system comprises a motion control system, an optical imaging system and an image processing system, the motion control system, the optical imaging system and the image processing system are in communication connection with an industrial personal computer through respective corresponding communication protocols; the motion control system comprises a three-dimensional object carrying platform; the three-dimensional object carrying platform adopts a gantry type three-dimensional motion structure; the motion control system is used for placing metal to carry out defect detection on the surface of the metal. With the optical detection means and optimizing the image processing algorithm improved, the system has the advantages of high detection precision, high detection speed, high detection stability, good repeatability and stable output detection result.

Description

technical field [0001] The invention belongs to the technical field of metal machining and manufacturing, and in particular relates to a metal surface defect detection system based on machine vision. Background technique [0002] During the heating or forging process of metal forgings, due to excessive heating speed, thermal stress, uneven deformation or internal defects, etc., crack defects appear in forgings. Some forging defects will affect the processing quality of subsequent processes, and some are serious. Affect the performance of forgings, reduce the service life of manufactured parts, and even endanger safety. At the same time, during the high-temperature processing of metal alloys, impurities such as metal oxides will be produced in the surface gap defect area, which will affect product performance. [0003] In the existing technology, the commonly used methods for removing metal oxides are pickling and mechanical grinding. Pickling is easy to cause harm to people...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/95G01N21/88G01N21/01
CPCG01N21/95G01N21/8851G01N21/01G01N2021/8887G01N2021/0112
Inventor 尚立兆雷枫程永丽铁兆瑞吴军辉
Owner 宝鸡高新智能制造技术有限公司
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