实用光纤布拉格光栅应变仪系统

Practical fiber-optic Bragg grating strain gauge system.

作者信息

Melle S M, Liu K, Measures R M

出版信息

Appl Opt. 1993 Jul 1;32(19):3601-9. doi: 10.1364/AO.32.003601.

DOI:10.1364/AO.32.003601

PMID:20829986

Abstract

A fiber-optic strain gauge system for use in structural monitoring and smart-structure applications is described. The strain gauge uses a fiber-optic Bragg grating sensor to measure strain and a passive, wavelength demodulation system to determine the wavelength of the narrow-band, backreflected spectrum from the grating sensor. The fiber-optic strain gauge system permits the measurement of both static and dynamic strains with a noise-limited resolution of 0.44 microstrain/√Hz, a measurement dynamic range of 27.8 dB, and a bandwidth of 250 Hz.

摘要

本文描述了一种用于结构监测和智能结构应用的光纤应变计系统。该应变计使用光纤布拉格光栅传感器测量应变，并采用无源波长解调系统来确定光栅传感器窄带背向反射光谱的波长。该光纤应变计系统能够测量静态和动态应变，其噪声限制分辨率为0.44微应变/√Hz，测量动态范围为27.8 dB，带宽为250 Hz。