MEASURING METHOD USING FBG SENSOR, AND DEVICE THEREOF

摘要

PROBLEM TO BE SOLVED: To simultaneously measure a distortion and temperature by separating one FBG sensor into an FBG section for sensing the distortion and temperature and an FBG section for sensing only the temperature, in a measuring method using an FBG sensor and a device thereof.

SOLUTION: A part of an optical fiber in which a diffraction grating is formed on a core is fixed in a state depending on a distortion of a measurement object, and the other part of the optical fiber in which the diffraction grating is formed on the core is fixed in a state not depending on the distortion of the measurement object. The distortion and temperature of the measurement object are measured by using a signal detected from the part of the optical fiber fixed in the state depending on the distortion of the measurement object and a signal detected from the part of the optical fiber fixed in the state not depending on the distortion of the measurement object.

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