采用同步相位检测的微小振动实时测量

Real-time Micro-vibration Measurement Using Synchronous Phase Detection

提出了一种半导体激光正弦相位调制干涉仪。该干涉仪可以实时测量物体的微小振动。利用简单的电路构成实时相位检测器 ,对干涉信号中的相位信号进行同步检测 ,最终获得实际振动的振幅频率。文中给出了具体的理论分析和实验结果。

A sinusoidal phase modulating laser diode interferometer is proposed. It is used to measure micro-vibration of an object in real-time. The real-time phase detector is constructed with a simple circuits. The amplitude and frequency of the vibration are measured by synchronously detecting the phases in interference signal. The theoretical analysis and experimental results are given.