摘要
介绍一种利用现代光通讯技术发展的单模光纤和光纤无源器件,以及半导体激光光源和高速半导体探测器构成的激光干涉测试系统,该系统可实时测量高频条件下微弱质点的速度和位移。对步进电机及冲击加载条件下,花岗岩表面的粒子速度及位移进行了测量。实验结果表明:该系统工作稳定,可用于高频发散弱应力波的检测;具有非接触测量、不用埋入、不干扰目标运动,测试精度高等优点。
A laser micro-displacement interferometer system has been developed on the basis of the development of modern optical communication technology. The interferometer consists of single-mode fiber, fiber coupled components, semiconductor laser and high speed detector. It can measure the real-time velocity histories of the propagation and attenuation of stress wave in the geologic media. The tests of it using the impact load system shows that the interferometer works well for the propagation and attenuation of high frequency stress wave in the geologic media.
出处
《应用激光》
CSCD
北大核心
2008年第5期383-385,398,共4页
Applied Laser
关键词
激光技术
位移干涉仪
粒子速度
应力波
Laser technique
displacement interferometer
particle velocity
stress wave
