双脉冲瞬态散斑全场测量方法研究

摘要

散斑测量技术在瞬态振动过程测量中具有不可或缺的重要地位。提出双脉冲瞬态散斑全场测量技术，解决了双脉冲激光器与双曝光相机的时序同步的关键技术，设计了基于双脉冲激光器的瞬态散斑光路系统，搭建了双脉冲瞬态散斑全场测量系统，从而实现了(2~800)μs 时间间隔内连续可调的瞬时振动形貌的测量。%Aiming at the impact of digital speckle pattern interferometry on the transient vibration measurements, the technology on double digital speckle pattern interferometry was conducted. Uniform distribution of laser beam energy by space filter is achieved, and double-pulse laser and high-speed cam-era work synchronously by controlling time accurately. The transient speckle interference pattern is ac-quired with the proposed method. The research seeks to investigate and provides transient vibration meas-urements with double-pulse interval from 2μs to 800μs.