基于能量比法和相关性的初至波走时自动拾取方法  

Automatic Picking Method of Primary Wave Arrivals by Energy Ratio Method and Correlation

作　　者：叶小龙[1] 王仲刚[1] 黄晓寒[1] 袁野[1] 

机构地区：[1]中国人民解放军后勤工程学院军事土木工程系,重庆401311

出　　处：《兵器装备工程学报》2016年第3期158-162,共5页Journal of Ordnance Equipment Engineering

基　　金：基金项目:基于弹性波CT的方钢管混凝土柱缺陷检测技术研究

摘　　要：利用冲击弹性波对钢管混凝土进行无损检测时,弹性波在构件中的传播波速是判别缺陷非常重要的一项指标,它对快速准确测量弹性波在钢管混凝土内部的走时尤为重要。基于能量比法和相关性提出了一种弹性波信号初至波走时自动拾取方法,采用Matlab编程实现初至波的拾取,解决了初至波走时难以自动拾取问题。该方法能快速准确地拾取初至波走时,并且具有较高的精度和稳定性。将其应用到弹性波波速估计中,得到了比较满意的结果。When using the elastic impact wave to test the concrete-filled steel tube non-destructively, the velocity of the elastic waves is an important index for judging defects. It is essential to measure the travel time quickly and accurately. Basing on the energy ratio and correlation, this research demonstrated an algorithm, which can automatically analyze the signal of the elastic wave and the travel time of the primary wave. Then, this paper used the Matlab to program in order to work out the problem that it is difficult to pick up the travel time of the primary wave. This algorithm not only can pick up the travel time quickly, but also has better accuracy and stability. By applying this algorithm into the estimation of the elastic wave＇ s velocity, the research got satisfactory results.

关 键 词：无损检测 初至波 能量比 相关性 自动拾取 

分 类 号：TG115.28[金属学及工艺—物理冶金] TN911.72[金属学及工艺—金属学]