基于能量比法和相关性的初至波走时自动拾取方法

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。

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

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 al-gorithm,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.