Fabry-Perot干涉技术及其在疲劳损坏检测中的应用  

CFPI technology and application in fatigue damage detection

作　　者：王洪水[1] 徐军[1] 李小峰[1] 徐利国[1] 

机构地区：[1]第二炮兵工程学院,西安710025

出　　处：《光学技术》2007年第S1期77-79,共3页Optical Technique

摘　　要：从激光超声的特点出发,分析目前主要的超声检测技术,重点研究Fabry-Perot干涉仪的原理和工程应用。共焦Fabry-Perot干涉仪具有只对固体表面的振动速度灵敏、有较大的入射孔径、集光能力强等优点,克服了其它干涉检测技术对工作环境的严格要求,广泛应用于工业生产中。为检测碳钢的疲劳破坏,设计了一个激光超声检测系统,分析不同超声频率和加载不同循环压力造成的疲劳损坏情况。This paper analyse the merit of laser-ultrasonic,particularize the major ultrasonic detecting method,especially confocal Fabry-Perot interferometer(CFPI) detection method are discussed.Most detecting methods have the shortcoming of being sensible to environment vibration,but CFPI can be only sensible to specimen.So can be widely used in the industry,meanwhile CFPI gets wide incidence aperture,be not that depend on environment.For the sake of detecting specimen fatigue damage,we introduce a laser-ultrasonic system,take an experiment to record the vibration of specimen,compare the change of ultrasonic waveform with the fatigue damage.

关 键 词：激光超声 非接触检测 Fabry-Perot干涉仪 疲劳损坏 

分 类 号：TP274.4[自动化与计算机技术—检测技术与自动化装置]