Study on the performance calibration method of FBG accelerometer based on vibration table

In order to achieve calibration of the performance indicators of FBG accelerometers, this study proposes a vibration table calibration method. By establishing the relationship between displacement and acceleration, a method for setting the vibration table output frequency and output acceleration is obtained. Taking a three-axis FBG accelerometer as an example, the study investigates its time-domain and frequency-domain waveforms after calibration on the vibration table, obtaining empirical representations of its resonance frequency and operating frequency band. Finally, an empirical calculation formula representing its sensitivity is derived, providing important reference for parameter calibration of FBG accelerometers and similar vibration sensors.