MULTI-FUNCTIONAL DISTRIBUTED OPTICAL FIBRE SENSING DEVICE

• Main Authors: SUN, Xiaoyan, TAO, Jing, LI, Binglin, LV, Lidong, ZHONG, Cheng, YAO, Jiming, GUO, Jinghong
• Format: Patent
• Language: Chinese; English; French
• Published: 24.01.2019
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; MEASURING; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; MEASURING QUANTITY OF HEAT; MEASURING TEMPERATURE; PHYSICS; TARIFF METERING APPARATUS; TESTING; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR

Disclosed is a multi-functional distributed optical fibre sensing device, comprising a laser (1), a first optical fibre coupler (201), a second optical fibre coupler (202), a third optical fibre coupler (211), a fourth optical fibre coupler (212), an acoustic-optical modulator (3), an optical fibre annular device (4), an optical interface (5), a first photoelectric detector (601), a second photoelectric detector (602), a first bandpass filter (701), a second bandpass filter (702), a third bandpass filter (711), a fourth bandpass filter (712), a first low noise amplifier (801), a second low noise amplifier (802), an optical switch (9), a frequency synthesiser (10), a frequency mixer (11), a low pass filter (12), a dual-channel data collection and processing module (13), and a computer (14). L'invention concerne un dispositif de détection de fibre optique distribuée multifonctionnel comprenant un laser (1), un premier coupleur de fibre optique (201), un deuxième coupleur de fibre optique (202), un troisième cou