莫尔条纹在微小振动测量中的应用

Application of moiré fringe in micro-vibration measurement

微小振动的频率和振幅的测量在工程技术领域具有重要意义 ,本文提出利用动态莫尔条纹光电信号测量微小振动的频率和振幅的方法。由于莫尔条纹具有放大作用 ,采用对莫尔条纹光电信号的细分技术 ,测量精度可以做得较高。实验表明 ,振幅测量分辨率可达光栅常数的二十分之一以上。

The measurement on frequency and amplitude of micro-vibration has an important significance in the fields of engineering and technology.In this paper,the method of using optical and electronic signals of moving moiré-fringe to measure micro-vibration's frequency and amplitude is given.Because of the magnifying power of moiré fringe,in addition to the subdivided technique about moiré fringe's signals,the result of measurement could reach relatively high level.The experiment shows,the resolving power of amplitude could surpass the one twentieth of grating constant.