声发射研究用的非接触式传感器  

NONCONTACT SENSORS FOR ACOUSTIC EMISSION RESEARCH

作　　者：梁家惠[1] 

机构地区：[1]北京航空航天大学应用物理系,北京100083

出　　处：《无损检测》2003年第1期31-35,共5页Nondestructive Testing

摘　　要：与常用压电声发射换能器不同 ,声发射研究中使用的非接触式宽带传感器主要有两种 ,即电容传感器和光学探测器。为了削弱孔径效应 ,空气间隙的电容传感器采用了不同的结构。光学探测器则是建立在激光干涉的基础上。利用偏振干涉方法研制的光学探测器是传感器的一种优化设计 ,而光纤传感器在实现声发射技术的现场应用中有许多潜在的优点。In comparison to conventional piezoelectric acoustic emission(AE) transducers, two groups of noncontact broadband sensors are reviewed. They are capacitance sensors and optical detectors. The air gap capacitance sensors with distinct composition have been developed for reducing aperture effect. The optical detectors are based on laser interferometers. Using polarizing interference is an optimal design and fibre optic sensors have many potential advantages for approaching AE field application.

关 键 词：非接触式传感器 声发射检验 电容传感器 光学探测器 光纤传感器 综述 

分 类 号：TH878[机械工程—仪器科学与技术] TG115.28[机械工程—精密仪器及机械]