Active infrared CCD weld seam detecting method

An active infrared and weld seam detection technology, which is used in measuring devices, optical testing of flaws/defects, material analysis by optical means, etc. Parameter extraction and other issues, to achieve the effect of simple and fast image processing algorithm, stable lighting model, and reducing the influence of mutual radiation

Inactive Publication Date: 2004-11-17
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

Under visible light, the illumination model of the image is unstable and dynamic, so the image processing of the weld is relatively complicated, and the segmentation effect of the weld image is very poor, which affects the extrac

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  • Active infrared CCD weld seam detecting method
  • Active infrared CCD weld seam detecting method
  • Active infrared CCD weld seam detecting method

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Embodiment Construction

[0020] The technical solution of the present invention will be further described below in conjunction with the drawings and embodiments.

[0021] The process of the active infrared CCD welding seam detection method of the present invention is as follows figure 1 Shown. Firstly, a CCD camera is used to obtain the infrared image of the weld. The infrared light-emitting diode is selected as the infrared light source, and the infrared light-emitting diode array is irradiated on the surface of the weld. CCD is used as the detector to obtain the active infrared image. The CCD has a special filter for infrared CCD. Mirror, transmit near-infrared light, cut off visible light; infrared light-emitting diode working voltage is 3V, working current is 10uA, the peak wavelength of light is 940nm, the beam angle is 34°, and the infrared image of the weld is obtained as image 3 Shown.

[0022] Then the computer pairs image 3 The infrared image of the weld is analyzed and processed, and the pro...

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Abstract

The invention is a kind of initiative infrared CCD welded seam detecting method. The infrared illuminant diode is used as the initiative infrared imaging light source, according to the micro organization structure and chemical ingredients change, acquires the welded seam initiative infrared image, acquires the video input of CCD with computer, then carries on a series of process to the welded seam infrared image, extracts character parameter to estimate the welding quality after image filter, image separation and image matching, and memorizes the result into data bank, then carries on statistic process to the welded seam quality, forms a report table to the fault seam.

Description

Technical field: [0001] The invention relates to an active infrared CCD welding seam detection method, which is used for welding seam detection in the industrial field, and is particularly suitable for welding seam detection of automobile parts, and belongs to the technical field of welding seam detection. Background technique: [0002] Due to the importance of weld inspection in the industry, people have conducted a lot of research work on weld inspection methods for many years, and now weld inspection has become a fast-developing technology. At present, there are mainly the following four effective methods: 1. Hard-ray (χ, γ) detection; 2. Ultrasonic detection; 3. Magnetic flux method detection; 4. CCD (solid-state camera) detection. The χ and γ rays in the hard-ray detection are harmful to the human body and are not safe. And it has to build lead houses to carry out the work. The cost of this kind of lead house is very high, and at the same time its other supporting equipment ...

Claims

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Application Information

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IPC IPC(8): G01N21/17G01N21/88
Inventor 丁国清颜国正王志武陈太星
Owner SHANGHAI JIAO TONG UNIV
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