Strain transfer in fiber optic sensors plays critical roles in sensor survival and measurement. The mechanisms, key factors, solutions, and applications of strain transfer models are reviewed.
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Three types of fiber optic strain sensors offer a wide range of strain measurement capabilities without sacrificing precision and sensitivity.
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High-definition strain sensing based on the Rayleigh backscatter delivers a virtually continuous line of strain measurements with sub-millimeter spatial resolution, employing very small lightweight optic.
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The technique is based on the extraction of the temperature profile of the fiber by using a fiber Bragg grating (FBG) array. We propose here a liquid level sensor using a long period fiber grating (LPFG) in which direct liquid level measurement is carried out by utilising an LPFG, 100mm in length and a periodicity of 1mm. The LPFG was exposed to liquids with varying levels and the wavelength shift of a selected loss band.
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High-definition temperature sensing based on the natural Rayleigh backscatter in optical fiber delivers a virtually continuous line of temperature measurements with sub-millimeter spatial resolution.
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