Implementation of a Precise Vibration Measurement System Based on Michelson Interferometer

In this paper, we present a system for precise vibration measurement of mechanical structures using a Michelson interferometer. The system was employed to detect nanometer-scale vibrations in a mirror induced by a speaker attached to it, with analysis performed in both time and frequency domains. It successfully measured the frequency of single-tone vibrations with an accuracy of a few hertz, even when the mirror was positioned several meters away. To estimate the resonant frequency of a mechanical structure, we applied an impulse input and transformed the resulting vibration signals using Fast Fourier Transform (FFT). The estimated resonance was validated by applying single-tone inputs at various frequencies, including those near the predicted resonance. As a demonstration of the system's sensitivity and for educational purposes, we played music through the speaker attached to the mirror, and the system was able to reproduce the original audio from the detected vibrations. Finally, we used the setup to measure vibrations generated by an electric motor in a linear guide system, where the mirror was attached to the movable platform.

کلیدواژه ها:

Vibration ، Michelson interferometer ، Implementation ، Precision measurement