A Displacement Sensor with Centimeter Dynamic Range and Submicrometer Resolution Based on an Optical Interferometer
We report a low cost and extrinsic Fabry-Perot interferometer-based optical fiber displacement sensor with a wide dynamic range, up to 2.0 cm, and 0.270 µm resolution. The fundamental design principle includes an inclined mirror, mounted on a translational stage, that combines with the end face of a single mode fiber to form a Fabry-Perot cavity. The user-configurable triangle geometry-based displacement transfer mechanism makes the sensor capable of measuring a wide displacement range. A fiber ceramic ferrule is used to support and orient the optical fiber, and a metal shell is used to package and protect the principal sensor elements. The novel sensor was employed to monitor shrinkage during the drying/curing stage of a square brick of mortar. The robust and easy-to-manufacture sensor can be easily commercialized and has great potential for applications in the chemical-oil industry, construction industry, and other industries with harsh environments.
C. Zhu et al., "A Displacement Sensor with Centimeter Dynamic Range and Submicrometer Resolution Based on an Optical Interferometer," IEEE Sensors Journal, vol. 17, no. 17, pp. 5523-5528, Institute of Electrical and Electronics Engineers (IEEE), Sep 2017.
The definitive version is available at https://doi.org/10.1109/JSEN.2017.2729281
Electrical and Computer Engineering
University of Missouri Research Board
Missouri University of Science and Technology. Materials Research Center
Missouri University of Science and Technology. Intelligent Systems Center
Keywords and Phrases
Cavity resonators; Construction industry; Fabry-Perot interferometers; Fiber optic sensors; Fiber optics; Fibers; Interferometers; Mirrors; Optical fibers; Single mode fibers; Temperature measurement; Displacement; Dynamic range; Extrinsic Fabry Perot interferometer; Harsh environment; Sub-micron resolutions; Displacement measurement; Cm dynamic range
International Standard Serial Number (ISSN)
Article - Journal
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