非接触测量振动与冲击速度的激光多普勒方法

Contactless Velocity Measurements of Vibration and Shock Using the Laser Doppler Method

本文论述了应用激光多普勒效应,非接触测量振动与冲击速度的方法。研制了一套带有频移的二维激光多普勒测速(LDV)系统,既可用于流动,也可用于固体运动测量。应用此系统对气缸活塞速度和冲击靶的大加速度的测量,进行了初步尝试。

This paper describes a contactless method for measuring the vibration and shock velocities using the laser Doppler effect. A two component Laser Doppler Velocimetry (LDV) System with frequency shift were developed which could be used both for the fluid flow and solid movement. By applying this system the piston velocities of an pneumatic cylinder and the high accelerations of a shock target had been measured in primary experiments.