Simple method to measure temperature and axial strain simultaneously using one in-Fiber Bragg-grating sensor

Yu Lung Lo, J. S. Sirkis

研究成果: Conference article同行評審

9 引文 斯高帕斯(Scopus)

摘要

A simple method to simultaneously measure temperature and axial strain for a surface mounted Bragg grating sensor is presented. This method uses a single, uniform pitch Bragg grating that is only partially glued on the structure. Thermomechanical strain fields will produce two different Bragg wavelengths from the one fiber Bragg grating sensor. The Bragg wavelength reflected from the sensor section not glued to the structure is used to measure temperature variations; and the Bragg wavelength reflected from the sensor section glued to the specimen is affected by both of strain and temperature variations. However, under conditions of no cross-talk sensitivity between temperature and strain, the spectral separation between two Bragg wavelengths is directly interpreted as a wavelength shift caused by the thermomechanical strain in structures. After the temperature variation is obtained, the mechanical strain can be calculated if the thermalexpansion coefficient of structures is known. Therefore, this method supplies a simple measurement in temperature and axial strain simultaneously.

原文English
頁(從 - 到)237-246
頁數10
期刊Proceedings of SPIE - The International Society for Optical Engineering
3042
DOIs
出版狀態Published - 1997 六月 6
事件Smart Structures and Materials 1997: Smart Sensing, Processing, and Instrumentation - San Diego, United States
持續時間: 1997 三月 31997 三月 6

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學
  • 電腦科學應用
  • 應用數學
  • 電氣與電子工程

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