Method and apparatus for determining phase sensitivity of an accelerometer based on an analysis of the harmonic components of the interference signal

摘要

The present invention relates to a phase sensitivity of the accelerometer using the evaluation method and apparatus for analysis of harmonic components of an interference signal and, more specifically, the phase sensitivity of the accelerometer about the evaluation method and apparatus of the accelerometer to determine the phase lag of the accelerometer by analyzing the interference signal obtained using a single photo-detector when the sinusoidal motion with an initial phase vibration. To this end, the present invention comprises the steps of: obtaining a time-domain interference signal generated from the signal reflected from the fixed mirror and an accelerometer in a single photo-detector; Converting the interfering signal time domain into a frequency domain interference signal including a plurality of harmonic signals by Fourier transform; And evaluation of the phase sensitivity of the accelerometer using analysis of the harmonic components of the interference signal using the initial phase of the vibration displacement of the accelerometer, characterized in that it comprises the step of determining the phase sensitivity of the accelerometer, contained in the frequency-domain interference signal It provides a method.