超声固体测温中波速与温度的相关性试验  

Experiment on the correlation between wave velocity and temperature in ultrasonic solid temperature measurement

作　　者：张锐 石友安[2] 魏东[2] 朱目成[1] ZHANG Rui;SHI Youan;WEI Dong;ZHU Mucheng(School of Manufacturing Science and Engineering,Southwest University of Science and Technology,Mianyang 621000,China;China Aerodynamics Research and Development Center,Mianyang 621000,China)

机构地区：[1]西南科技大学制造科学与工程学院,绵阳621000 [2]中国空气动力研究与发展中心,绵阳621000

出　　处：《无损检测》2021年第7期1-4,12,共5页Nondestructive Testing

基　　金：国家自然科学基金项目(11402285)。

摘　　要：波速与温度的相关性是超声固体测温的前提和基础,由于超声在固体介质中的波形复杂,其传播特性也很复杂,且尚未给出温度变化时波速与温度的理论公式,这在极大程度上限制了超声固体测温的精度和适用范围。理论分析了超声固体测温中声时的温度灵敏度,搭建了基于声时检测的超声固体测温原理性试验平台,在此基础上开展了波速与温度的相关性试验研究,得到了横波波速与温度的函数关系式及其影响规律,为高温条件下超声固体测温提供了依据。The correlation between wave velocity and temperature is the premise and foundation of ultrasonic solid temperature measurement. Due to the complex waveform in solid medium, the wave propagation characteristics are also very complex, and the theoretical formula of wave velocity and temperature when temperature changes has not been given, which greatly limits the accuracy and application range of ultrasonic solid temperature measurement. Therefore, the temperature sensitivity of ultrasonic solid temperature measurement is theoretically analyzed, and a theoretical experimental platform of ultrasonic solid temperature measurement based on acoustic time measurement is built. On this basis, the experimental study on the correlation between wave velocity and temperature is carried out, and the relationship between shear wave velocity and temperature and its influence law are obtained.It provides a basis for ultrasonic solid temperature measurement at high temperature.

关 键 词：高温 超声测温 声时检测 横波波速 

分 类 号：TB559[理学—物理] TG115.28[理学—声学]