高性能激光多普勒测振仪

High Performance Laser Doppler Vibrometer

本文介绍一台高性能激光多普勒测振仪,叙述了它的工作原理及特点。该仪器光路中省去了声光调制器,结构简单,为此采用了独特的信号处理方法,电路集成度高,由微机自动控制测量过程。该仪器能同时非接触地测定振动体的频率和幅度,测量范围大、精度高。

This paper introduces a high performance laser Doppler vibro-meter,describes its optical and electrical principles,and its characteristics,the Bragg modulater is not used so that its optic lstructure and electricalcircuits are simpler.A new processing method is used.The measurement pr-ocess is controlled by microcomputer.The vibrating amplitued and frequencyin wider range can be measured simultaneously,the measuring values are ac-curate.