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A 3D CT defect extraction and marking method for solid motors

A technology of solid engine and marking method, which is applied in image data processing, instrumentation, calculation, etc., can solve problems such as single detection method, inability to process in real time, and high price of industrial CT equipment, and achieve good results

Inactive Publication Date: 2017-11-28
ZHONGBEI UNIV
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Problems solved by technology

However, the post-processing software for industrial CT images is mostly foreign products. The price of industrial CT equipment itself is very expensive, and the price of its reconstruction post-processing software is also very high, and the current defect detection methods still have slow detection speed and poor detection methods. Single, can not be processed in real time and many other problems

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  • A 3D CT defect extraction and marking method for solid motors
  • A 3D CT defect extraction and marking method for solid motors

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0029] A solid engine three-dimensional CT defect extraction and marking method disclosed by the invention, such as figure 1 as shown,

[0030] At first, obtain solid engine three-dimensional body data, the implementation image data of the present invention originates from the solid engine model workpiece 1 that contains artificial design defect (such as figure 2 As shown), the diameter of the workpiece 1 is 120mm, the shell steel wall thickness is 2mm, the center is the star hole 10 for filling medicine, and there are four unevenly distributed holes 11, 12, 13, 14 on the wall to represent defects, and the largest hole is 14 The diameter is 3mm, the smallest hole is 11 and the diameter is 2mm. The projection data is collected by the flat cone beam CT experimental system. The working process is as follows: First, the workpiece to be measured is fixed o...

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Abstract

The invention relates to a three-dimensional CT defect extracting and marking method for a solid engine and belongs to the field of nondestructive detection. In terms of a series of solid engine propellant hole defects, when defect segmentation is conducted, reconstructed volume data are layered firstly, operations such as filtering, morphological processing, threshold segmentation, defect extracting, defect marking and three-dimensional visualization are conducted on a set of obtained two-dimensional slice data, and defect information is extracted and marked. During morphological processing, top-hat transformation is conducted on each image layer by adopting a square structure operator which is slightly smaller than a central star hole 10. During defect extracting, a defect area is extracted by adopting the maximum connected region method. Through the three-dimensional CT defect extracting and marking method for the solid engine, hole defects in an image can be effectively segmented, extracted and marked.

Description

technical field [0001] The invention relates to a radiation imaging technology, which belongs to the field of non-destructive testing, in particular to a method for extracting and marking three-dimensional CT defects of solid motors. Background technique [0002] Industrial CT technology, namely computerized tomography technology, is one of the best detection technologies recognized in the field of non-destructive testing. The production cost of large solid motors is very high. If there is no advanced non-destructive testing and evaluation technology, any defect exceeding the standard will easily lead to engine failure, and its economic loss will be immeasurable. High-energy X-ray CT testing equipment can regularly carry out non-disintegration testing of solid motors, discover the spatial position and geometric dimensions of various defects in time, grasp their quality and change rules, and provide reliable basis for production and maintenance. Among all the components of s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06T7/11G06T7/136G06T7/155
Inventor 王明泉侯慧玲陈培兴杨娟李世虎王鑫
Owner ZHONGBEI UNIV
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