Simulation and experimental study of a three-axis fiber Bragg grating accelerometer based on the pull–push mechanism

Abstract

A three-axis fiber Bragg grating accelerometer, which has uniform sensitivities to three axes, has been developed for seismic application. This paper presents the design, simulation and calibration of the three-axis accelerometer. A series of experiments were performed to measure harmonic vibration and shock vibration. The precise acceleration was measured by a PZT accelerometer which provided high sensitivity. The fully described dynamic sensitivity of three-axis accelerometers represented by a 3-by-3 matrix is given. The results indicate that the accelerometer has a sensitivity of 0.068 V g−1 in a measured full scale of ±2.5 m s−2. The cross-axis sensitivity was measured as −75.5 dB, −75.5 dB and −78.2 dB, respectively.

Fibre optic sensing system for monitoring of current collectors and overhead contact lines of railways

“…In Antunes et al (2011) andJiang andYang (2013) an FBG is stretched by a moving inertial mass. In Mita et al (2001) and Au et al (2008) a bending beam -or rather a cantilever-based FBG accelerometer -is investigated.…”

P6.7 - Fiber Optic Sensing System for Monitoring of Current Collectors and Catenary of Railways

“…Different types of FBG based acceleration sensors can be found in the literature. [6] and [7] stretch a FBG by a moving mass. [8] used a bending beam.…”

A Novel Fiber Bragg Grating Accelerometer Based on Fiber Vibrating Wire

“…we can record the shift of centre wavelength to detect the acceleration. Except that, to ensure the vibration's stability, the oscillator we choose must have a regular shape, such as cuboids, ellipsoid [10].…”