基于相位谱延时估计的波速估算方法  

Evaluation of Wave Speed in Concrete Based on Phase Spectrum Time Delay Estimation

作　　者：赵国文[1] 

机构地区：[1]集美大学轮机工程学院,厦门361021

出　　处：《无损检测》2005年第6期303-305,共3页Nondestructive Testing

基　　金：交通部"通达计划"资助项目(95-06-02-04)

摘　　要：研究了基于相位谱的时间延迟估计原理及其算法。将其应用到基于冲击反射法的双传感器测量应力波波速方法中,解决了传统的直接观察法中的人为误差的影响和噪声对测量精度的影响,降低了测量误差,波速数据具有更好的一致性,取得了满意的试验结果。A time delay estimation algorithm and theory based on phase function were studied. The algorithm was applied to wave speed evaluation when wave speed of concrete structures was measured by two transducers. The influence of observation error and noise were eliminated when phase spectrum based time delay evaluation was carried out. Measurement errors were reduced and wave speed data was more consistent. Experimental results were satisfactory.

关 键 词：超声波检测 相位谱延时估计 混凝土 波速测量 

分 类 号：TG115.28[金属学及工艺—物理冶金] TN352[金属学及工艺—金属学]