双光路电子散斑振动测量系统

THE SYSTEM OF DOUBLE-OPTICAL-PATH ESPI FOR THE VIBRATION MEASUREMENT

本文给出了一种双光路电子散斑振动测量系统 ,该系统结合了普通 ESPI离面振动测量光路和退敏感光路 ,既能对较大振幅范围的振动进行定性观测 ,又能实现全场自动定量分析 ,同时避免了相位去包裹处理 .系统具有较高的抗干扰能力 ,可以应用于实际工程中复杂非连续结构的振动特性分析 .

In this paper,a system of double optical path ESPI for measuring vibration with larger amplitude is proposed.This system contains the common ESPI optical path for measuring out plane vibration and the de sensitized optical path.It can be used to observe qualitatively and analyze quantitatively the vibration mode.At the same time,the phase unwrapping is avoided.The anti disturbance capability of this system is high,so it can be used to analyze the vibration characteristics of complex and discontinuous structure in practical engineering.