monitoring system using dual wavelength fiber bragg grating sensor and method thereof

摘要

by the invention in a dual wavelength FBG (Fiber Bragg Grating) sensor using a monitoring system and method is disclosed The. Dual wavelength FBG sensor in accordance with the present invention, but is formed so as to have different physical properties of three grid unit, in a predetermined area in the optical fiber, the reflection wave is formed to reflect the first signal for the first signal light wavelength in the core of the first outer diameter 1 grid unit; Is connected to the first grating portion, the second grating portion formed to reflect the second reflected wave signal for the first signal light wavelength in the core of the second outer diameter; And is connected to the second grating section, includes a third grating is formed so as to reflect the third reflection wave signal to the second signal light wavelength in the core of the second outer diameter. Through this, the present invention means that the temperature and strain at the same time, and detecting the detection range, the number of FBG sensors can be further extended.