Banner & Witcoff, Ltd.
Optical fiber distributed monitoring system and method
An optical fiber distributed monitoring system and method is provided. The system includes a laser device, an acousto-optic modulator, a phase matching interferometer, a photoelectric detector and a phase demodulation module. After entering the phase matching interferometer, the Rayleigh backscattering light containing parameter information output from the sensing optical fiber enters the two arms of the phase matching interferometer respectively, and the light of the two arms of the phase matching interferometer is phase-modulated by the first modulation wave and the second modulation wave, respectively and then interfere with each other to generate interference light. The photoelectric detector converts a light signal into an electric signal, and the phase demodulation module processes the electric signal based on the Hilbert algorithm to obtain the parameter change of the environment under test.
Laser Institute of Shandong Academy of Sciences
G G G G G G G
G01B G01D G01D G01B G01M G01M G01H
inventional inventional additional inventional inventional inventional inventional
Yang Wen'an Yingying Ying Chang Chen Bing Xiaohui Chang Jiasheng Sheng
Liu Zhao Wang Shang Li Wang Cao Liu Wang Ni Huang