Tomography Ray-tracing Based on High-order Weighting and Maze Algorithm
摘 要
通过对LTI线性插值法的追踪公式和全局扫描方法的改进,提出了一种基于高阶加权和迷宫算法的层析成像射线追踪法(HLTI)。该算法通过引入Taylor加权高阶项对LTI追踪公式进行改进,减小了由于线性条件假设而产生的累积误差,提高了射线追踪精度,解决了LTI追踪公式出现复值解而失效的问题;并利用迷宫算法原理对全局扫描方式进行优化,解决了传统扫描方法不能反向和竖向追踪的问题。仿真试验结果表明,新算法HLTI较传统的LTI算法具有更高的射线追踪精度和更好的成像效果。
Abstract
Through the improvement to the LTI track formula (linear travel-time interpolation) and global scanning method, a HLTI based on higher order weighting and maze algorithm has been advanced. By means of improving LTI track formula via bringing in Taylor higher order weighted item, this new algorithm reduces the accumulative error caused by linear condition hypothesis, improves the accuracy of ray-tracing, and thus solves the invalidation problem come about by the complex-value solution of LTI track formula. Besides, by taking advantage of the maze algorithm principle to optimize the global scanning method, the problem of the traditional scanning method which is incapable of backward and vertical tracing has been solved. The simulation experiment results indicate that the new HLTI has higher ray-tracing accuracy and better image quality than the traditional LTI.
中图分类号 TG115.28 DOI 10.11973/wsjc201702009
所属栏目 试验研究
基金项目
收稿日期 2016/5/25
修改稿日期
网络出版日期
作者单位点击查看
联系人作者黄晓寒(hxhshr@sina.com)
备注黄晓寒(1990-),女,硕士,讲师,主要研究方向为特种结构检测与加固。
引用该论文: HUANG Xiao-han,WANG Zhong-gang,YUAN Ye,ZHANG Yu. Tomography Ray-tracing Based on High-order Weighting and Maze Algorithm[J]. Nondestructive Testing, 2017, 39(2): 34~37
黄晓寒,王仲刚,袁野,张彧. 基于高阶加权和迷宫算法的层析成像射线追踪法[J]. 无损检测, 2017, 39(2): 34~37
共有人对该论文发表了看法,其中:
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】VIDALE J E. Finite-difference calculation of travel times[J]. Geophysics, 1988, 78:2062-2076.
【2】李强, 白超英. 复杂介质中地震波前及射线追踪综述[J].地球物理学进展,2012,27(1):92-104.
【3】顾孝同. 国内工程CT技术的发展与应用[J]. 工程地球物理学报, 2006,3(4):278-282.
【2】李强, 白超英. 复杂介质中地震波前及射线追踪综述[J].地球物理学进展,2012,27(1):92-104.
【3】顾孝同. 国内工程CT技术的发展与应用[J]. 工程地球物理学报, 2006,3(4):278-282.
相关信息