An Extrinsic Fabry-Perot Interferometer-Based Large Strain Sensor with High Resolution
A three-layer packaged structure is proposed for an extrinsic Fabry-Perot interferometer-based optical fiber sensor in order to produce high resolution for large strains. The resolutions of three data processing algorithms including interference frequency tracking, period tracking and phase tracking are investigated and compared. Laboratory tests indicate that the proposed sensor structure can measure a strain of up to ±120 000 με (±12%) with resolution as high as 10 με. The sensor prototype is insensitive to fiber misalignment, enabling the study of progressive structural failures with an integrated use of the three algorithms.
Y. Huang et al., "An Extrinsic Fabry-Perot Interferometer-Based Large Strain Sensor with High Resolution," Measurement Science and Technology, vol. 21, no. 10, IOP Publishing Ltd., Oct 2010.
The definitive version is available at http://dx.doi.org/10.1088/0957-0233/21/10/105308
Civil, Architectural and Environmental Engineering
Electrical and Computer Engineering
Keywords and Phrases
Extrinsic Fabry-Perot Interferometer (EFPI); High Resolution; Large Strain Measurement; Strain Sensor; Structural Health Monitoring; Data Processing; Fiber Optic Sensors; Fracture Mechanics; Monitoring; Optical Fibers; Optical Instruments; Strain Gages
International Standard Serial Number (ISSN)
Article - Journal
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