Ceramic radome crack automatic detection method

A ceramic antenna and automatic detection technology, which is applied in the direction of optical testing flaws/defects, can solve problems such as large detection errors and inability to guarantee product detection quality, and achieve accurate measurement results

Inactive Publication Date: 2013-02-20
SHANDONG UNIV OF TECH
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Problems solved by technology

[0002] Thin-wall ceramic radome products often have crack defects after production, but in the current inspection of thin-wall ceramic radome products, the detection of cracks is only carried out by manual observation. This measurement method has a large detection error and cannot guarantee the quality of the product. The detection quality of

Method used

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  • Ceramic radome crack automatic detection method
  • Ceramic radome crack automatic detection method
  • Ceramic radome crack automatic detection method

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Embodiment Construction

[0022] Set the light source inside the ceramic radome, and then use the CCD camera outside the radome to automatically collect the transmission images of different parts of the radome, and process the collected grayscale images according to the following steps:

[0023] Step 1): In order to increase the contrast between the crack defect area and the non-defect area in the collected grayscale image and highlight the crack defect area, it is necessary to perform contrast enhancement processing, which is processed by segmented linear change, and the transformation formula is:

[0024] g ( x , y ) = c a × f ( x , y ) ...

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Abstract

The invention relates to a ceramic radome crack automatic detection method. The method is characterized in that the detection is carried out with a transmission image processing method. The method comprises the specific steps that: (1) a radome transmission image is obtained; (2) the image is subjected to gray scale and contrast enhancement processing, such that a crack area is underlined; (3) a binarization treatment is carried out; (4) a median filtering noise removing treatment is carried out; (5) a crack framework abstraction treatment is carried out; and (6) a crack length statistic treatment is carried out. With the treatment process, ceramic radome tiny cracks can be detected. According to the invention, with the radome crack transmission image processing method, radome crack automatic detection is realized.

Description

technical field [0001] The invention relates to an automatic detection method for cracks in a ceramic radome, belonging to the technical field of nondestructive detection. Background technique [0002] Thin-wall ceramic radome products often have crack defects after production, but in the current inspection of thin-wall ceramic radome products, the detection of cracks is only carried out by manual observation. This measurement method has a large detection error and cannot guarantee the quality of the product. quality of detection. Contents of the invention [0003] The object of the present invention is to provide an automatic detection method for ceramic radome cracks that can overcome the above-mentioned defects, detect accurately and have high efficiency. Its technical solution is: [0004] An automatic detection method for ceramic radome cracks, which is characterized in that the transmission image processing method is used for detection, and the specific steps are: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/88
Inventor 赵玉刚李业富
Owner SHANDONG UNIV OF TECH
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