Photonic 110 distributed optical fiber early warning system(DAS)
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Effective vibration monitoring of up to 80KM in single channel, vibration detection of 150KM in double channel, rapid vibration monitoring, the shortest vibration monitoring period of the system is as low as 0.3S, pattern recognition and classification, the system can self-learn the environmental background noise, and after system recording, classification training can automatically identify and filter out interference effects.
Distributed vibration sensing technology is a distributed optical fiber sensor based on coherent Rayleigh scattering. It takes advantage of the sensitivity of optical fiber to physical quantities such as vibration, sound, deformation, etc. When different signals are applied to the sensing optical fiber from outside, the refractive index and length of the optical fiber will change slightly due to the elasto-optical effect, which will lead to the change of transmitted signals (phase, intensity, frequency) in the optical fiber.
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