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Journal of Sensors
Volume 2010, Article ID 839803, 10 pages
http://dx.doi.org/10.1155/2010/839803
Research Article

Fiber Strain Measurement for Wide Region Quasidistributed Sensing by Optical Correlation Sensor with Region Separation Techniques

1Department of Electronic and Photonic System Engineering, Kochi University of Technology, Tosayamada-cho, Kochi 782-8502, Japan
2ITEAM Research Institute, Universidad Politécnica de Valencia, 46022 Valencia, Spain

Received 18 March 2010; Revised 25 May 2010; Accepted 31 May 2010

Academic Editor: Ignacio Matias

Copyright © 2010 Xunjian Xu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The useful application of optical pulse correlation sensor for wide region quasidistributed fiber strain measurement is investigated. Using region separation techniques of wavelength multiplexing with FBGs and time multiplexing with intensity partial reflectors, the sensor measures the correlations between reference pulses and monitoring pulses from several cascadable selected sensing regions. This novel sensing system can select the regions and obtain the distributed strain information in any desired sensing region.