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Composite material image quality indicator and industrial CT detection quality judgment method

A technology of composite materials and determination methods, which is applied in measurement devices, analytical materials, material analysis using wave/particle radiation, etc. problem, to achieve the effect of intuitive and efficient judgment method, low cost, and reduced detection cost

Inactive Publication Date: 2019-04-16
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For composite material products with high cost and small batches, industrial CT testing is carried out according to the currently promulgated standards. In order to characterize the defect detection resolution of industrial CT testing results, even products of the same material with different shapes and sizes need to be produced. The comparison standard sample with the same size, shape, material and density as the tested product, the cost of testing is too high
[0004] In the current public information, the X-ray radiography detection method adopts the image quality meter, which is used for quality judgment in the X-ray radiography detection. In the shape of steps, the depth of the hole on the image quality meter changes gradually, and the penetration thickness of the rays for holes of different depths is also different. The main reaction is that the intensity of the rays on the film after penetrating different thicknesses is within the blackness range specified by the film. It cannot directly reflect the detection resolution of holes, inclusions, cracks and other defects
X-ray photographic image quality meter and its usage method are not suitable for detection by industrial CT method

Method used

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  • Composite material image quality indicator and industrial CT detection quality judgment method
  • Composite material image quality indicator and industrial CT detection quality judgment method
  • Composite material image quality indicator and industrial CT detection quality judgment method

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Experimental program
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Embodiment 1

[0051] As shown in Figure 1, the composite material image (hole-type image quality meter) is composed of a substrate 1 and through holes 2 of different diameters processed on the substrate, such as Figure 1a As shown in and b, the diameter of the through hole decreases from left to right, and the distance between any adjacent through holes is larger than the diameter of the adjacent through hole, and the diameter of the through hole gradually decreases from 1.6mm to 0.4mm. It can be used to detect composite material products with holes and inclusion defects with a diameter of 0.4mm or more.

[0052] As shown in FIG. 2 , the composite image (groove image quality meter) consists of a substrate 1 and air gaps 3 of different widths processed on the substrate. Such as Figure 2a As shown in , b, the arrangement width of the gaps increases sequentially from left to right, and the distance between any adjacent gaps is greater than the width of adjacent gaps. The width of the air g...

Embodiment 2

[0054] A certain composite material product requires the detection of holes and inclusion defects with a diameter of more than 0.8mm, as well as delamination and crack defects with a width of more than 0.2mm, and the slice thickness is not greater than 0.2mm.

[0055] The quality determination method includes the following steps:

[0056] 1. Prepare hole-type image quality meter and groove-type image quality meter

[0057] The hole-type image quality meter is similar to that shown in Figure 1. The minimum hole diameter on the hole-type image quality meter is 0.2mm, and the groove-type image quality meter is similar to that shown in Figure 2. The minimum air gap width on the hole-type image quality meter is 0.2mm, which meets the detection requirements of composite products, and can be used for industrial CT detection of this kind of composite products.

[0058] 2. Place the image quality meter on the position of the industrial CT slice that needs to be detected on the product...

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Abstract

The invention provides a composite material image quality indicator and an industrial CT detection quality judgment method. The composite material image quality indicator is characterized by being composed of a substrate and a series of through holes with different hole diameters and / or a series of air gaps with different widths which are machined in the substrate. According to the composite material image quality indicator and the industrial CT detection quality judgment method, compared with a mode of requiring to manufacture a defect comparison standard sample with the size and shape same as those an object to be detected, manufacturing is simple, the cost is relatively low, and the industrial CT detection cost is greatly reduced.

Description

technical field [0001] The invention relates to a composite material image quality meter and an industrial CT detection quality judgment method, belonging to the technical field of composite material industrial CT detection quality judgment. Background technique [0002] Industrial CT inspection technology is one of the main methods for internal quality inspection of composite materials. Especially for porous composite materials, industrial CT can effectively detect defects such as holes, inclusions, cracks, and delaminations inside the material. The resolution of industrial CT for defect detection depends on the industrial CT detection conditions and the density, size, shape and other characteristics of the detected object. When performing industrial CT inspection on products, only when the detection resolution meets the minimum defect detection requirements of the product, the industrial CT inspection results can be used for the internal quality evaluation of the product. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/046
CPCG01N23/046
Inventor 江柏红于士章高晓进周金帅王岳江玉朗
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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