Method for detecting industry CT of batch product internal material density
A material density and detection method technology, applied in the direction of analyzing materials, using radiation for material analysis, using wave/particle radiation for material analysis, etc., can solve the problem of limited size, cannot place too many samples, and cannot meet mass production To achieve the effect of broadening the scope of use and improving accuracy
Inactive Publication Date: 2008-10-08
中国兵器工业第二一三研究所
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Furthermore, the size of any industrial CT detection field is limited, and too many samples cannot be placed in the same CT detection. production testing needs
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[0016] According to the law of ray attenuation of penetrating substances, the relationship between transmitted ray intensity and material density is an exponential relationship, which makes it difficult to distinguish substances with different densities on CT images displayed in grayscale values. But in practice, the CT image that people observe is an image after linearization processing, noise reduction processing and a series of mathematical corrections, and the CT value on such a CT image is similar to the density of the substance at the corresponding position of the detection object. Proportional relationship, the CT value on the CT map of the material with high density is high, and the CT value on the CT map of the material with low density is low. Density and CT value are not strictly linear proportional relationship. Because the CT value is not only affected by material density, incident ray intensity, scanning thickness, and detector sensitivity, but also affected by f...
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Abstract
The invention discloses an industry CT method for detecting internal material density of bulk products, the method is based on the theory that linear relationship is existed in CT values of different CT images of same product, property relation in the different CT images of different batch of products is determined through put sub-kind pieces which have greater difference in density into different detection group in the same batch of product, and Data conversion relationship in the different CT values of the different CT images is given. The outstanding advantages of the invention is that an adjustment standard in different CT detections of the same patch of the products is unified, and density distributed information reported by each CT image in the same patch of the products can be compared, not only the need required by density distributed of the industry CT detection in mass production is satisfied, but also the application range of the industry CT detection is broadened.
Description
technical field [0001] The invention belongs to the technical field of industrial CT non-destructive testing applications, and mainly relates to a method for using industrial CT to detect the density of materials inside products, in particular to an industrial CT detection method for the density of a certain material or multiple materials inside batch products or similar products. technical background [0002] CT image is a non-destructive inspection image obtained by using industrial CT equipment to scan the finished product. The image only reflects the image information of the scanned slice, and does not reflect the information other than the non-scanned slice, so the internal assembly relationship information of the finished product structure and the information of each component material on the scanned slice can be accurately judged on the CT image. In CT detection, the components with the same physical properties of the structure are called components, such as parts, mi...
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IPC IPC(8): G01N23/083G01N23/04
Inventor 陈慧能
Owner 中国兵器工业第二一三研究所