EQUI-ANGLE SAMPLING TECHNIQUE FOR PRECISION AMPLITUDE AND PHASE MEASUREMENT, AND PRECISION AMPLITUDE AND PHASE MEASUREMENT APPARATUS USING THE SAME METHOD

摘要

The present invention provides three configuration methods that can implement the Equi-Angle Sampling Method (EASM), that is, output signal measurement of a vibration sensor, vibration amplitude measurement using a laser interferometer, and a linear or rotary encoder. The method of constructing the vibration amplitude measuring device is presented. A theoretical conversion method for accurately estimating the amplitude and phase corresponding to the calibration frequency from the measurement vibration signal obtained from the isometric measuring device of the vibration amplitude is also presented. The experimental results obtained by applying the isometric signal acquisition method to the actual rotation vibration calibration system are confirmed, and it is confirmed that the isometric signal collection method proposed by this patent provides improved vibration amplitude measurement accuracy than the existing precision vibration measurement method. can do.;Amplitude, Phase, Vibration Precise Measurements, Isometric Signal Acquisition