X-ray computed laminographic system for plates and shells

HU Xin-hua; FU Jian; LIU Zhen-zhong

doi:10.3788/OPE.20152313.0158

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X-ray computed laminographic system for plates and shells

更新时间：2020-08-13

- X-ray computed laminographic system for plates and shells
- Optics and Precision Engineering Vol. 23, Issue 10z, Pages: 159-164(2015)
- 作者机构：
  
  北京航空航天大学机械工程及自动化学院北京,100083
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20152313.0158
  CLC： TH878.1;TG115.281
- Received：18 June 2015，
  
  Revised：10 July 2015，
  
  Published：14 November 2015
- 稿件说明：
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胡新华, 傅健, 刘振中. 板壳结构X射线计算机分层层析系统[J]. 光学精密工程, 2015,23(10z): 159-164

HU Xin-hua, FU Jian, LIU Zhen-zhong. X-ray computed laminographic system for plates and shells[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 159-164
胡新华, 傅健, 刘振中. 板壳结构X射线计算机分层层析系统[J]. 光学精密工程, 2015,23(10z): 159-164 DOI： 10.3788/OPE.20152313.0158.

HU Xin-hua, FU Jian, LIU Zhen-zhong. X-ray computed laminographic system for plates and shells[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 159-164 DOI： 10.3788/OPE.20152313.0158.

摘要

研制了基于工件倾斜回转扫描的计算机分层层析成像系统

用于实现长宽厚度比大的板壳结构工件的层析成像检测。描述了研制系统的组成

介绍了采用的X射线源、探测器以及倾角可调精密机械扫描装置等;然后

基于X射线与物质的相互作用原理

设计了工件倾斜回转层析扫描方式

分析了其工作原理

并对采用的基于代数迭代的图像重建算法和系统几何校准技术进行了讨论;最后

完成了系统调试

并以标准试件开展了系统性能测试和应用验证实验。实验结果表明:设计的系统层析成像空间分辨率达到3 lp/mm;密度分辨力达到0.3%

可满足板壳结构高精度分层层析成像要求。该系统在板壳层析检测方面优于传统的CT检测系统。

Abstract

A Computed Laminiography (CL) imaging system was developed based on the rotation scanning of tilted objects to realize tomographic imaging inspection of plates and shells. The system structure was outlined and the adopted X-ray source

detector and mechanical system were described. Then

according to the X-ray with matter interaction principle

the rotation laminiography scanning mode based on tilted objects was designed and its operation mechanism was analyzed. Furthermore

the algebraic iterative reconstruction algorithm and system geometric calibration method were discussed. Finally

the system was adjusted and the performance testing and the application experiments were carried out. Experimental results indicate that the imaging spatial resolution of the developed system reaches 3 lp/mm and the density resolution is 0.3%. It satisfies the high-precision tomographic imaging inspection requirements of plates and shells and the laminiographic testing performance for plates and shells is superior to that of traditional TC method.

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references

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