一种用于L_(CR)波应力检测的LFMCW声时测量系统设计与实现  

Design and Implementation of the System to Measure the Propagation Time of Ultrasonic Wave Based on LFMCW for Stress Measurement with LCR Wave

作　　者：何林[1] 丁杰雄[1] 孔朝志[1] 

机构地区：[1]电子科技大学机械电子工程学院,四川成都611731

出　　处：《测控技术》2011年第2期106-111,共6页Measurement & Control Technology

摘　　要：为了测量基于临界折射纵波法(LCR波,critically refracted longitudinal)的声弹性应力检测中超声波的传播声时,设计了一套超声波传播声时测量系统,介绍了系统的组成和工作原理。该系统根据LCR波应力测量原理和线性调频连续波(LFMCW,linear frequency modulated continuous wave)时间间隔测量机理,采用LFMCW方式激发LCR波,实验表明,该系统能有效地测量超声波的传播声时。A system is developed for measuring the propagation time of ultrasonic wave in normal stress measurement with critically refracted longitudinal wave（LCR wave）,constitution and operating principle about the system is presented.Linear frequency modulated continuous wave（LFMCW） is adopted in the system to stimulate continuously LCR wave based on the way to measure the propagation time with LFMCW.The system runs successfully and the result shows that it has the ability to measure the propagation time.

关 键 词：临界折射纵波 声弹性 应力测量 线性调频连续波 声时测量 

分 类 号：TM932[电气工程—电力电子与电力传动]