This paper reports on a novel optical fiber sensor configuration for conducting simultaneous strain and temperature measurements. The sensor consisted of an optical fiber-based extrinsic Fabry-Perot interferometer (EFPI) with an integrated fiber Bragg grating (FBG). The FBG was located within a glass capillary which housed the EFPI sensor and was thus in a strain-free condition. The FBG is primarily sensitive to temperature, while the EFPI was sensitive to both strain and temperature. The integrated FBG/EFPI sensor was embedded in a carbon fiber reinforced composite and evaluated. The standard deviation of strain measurement was 36 (mu) e in the range 0 to 1200 (mu) e, and the temperature measurement had a standard deviation of 3.5 degrees C in the range 30 degrees to 70 degrees C. The thermal expansion of the cross-ply composite was investigated and was found approximately 4.05 X 10-6 degrees C.
|Title of host publication||Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials|
|Editors||Richard O. Claus, William B. Spillman, Jr.|
|Number of pages||8|
|Publication status||Published - Jul 1998|
|Event||Conference on Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials - San Diego, California, United States|
Duration: 1 Mar 1998 → …
|Conference||Conference on Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials|
|City||San Diego, California|
|Period||1/03/98 → …|
Bibliographical noteTonguy Liu ; Gerard F. Fernando ; Lin Zhang ; Ian Bennion ; Yun-Jiang Rao and David A. Jackson "Simultaneous strain and temperature measurement using an integrated fiber Bragg grating/extrinsic Fabry-Perot sensor", Proc. SPIE 3330, Smart Structures and Materials 1998: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, 324 (July 21, 1998);
Copyright 1998 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.