Distributed sensing fiber sound emission fusion perception system and running method

A sensing fiber and sensing system technology, applied in the field of distributed sensing fiber optic acoustic emission fusion sensing system, can solve the problems of poor resistance to electrical interference, large system, too many cables, etc., to reduce monitoring costs, high Spatial resolution, simple effect of structure layout
CN106198751AActive Publication Date: 2016-12-07HOHAI UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
HOHAI UNIV
Publication Date
2016-12-07

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Abstract

The invention discloses a distributed sensing fiber sound emission fusion perception system and a running method. The perception system comprises a sensing fiber temperature-sensitive compensation device and a sensing fiber sound emission demodulation device, wherein a sensing fiber in the sensing fiber temperature-sensitive compensation device is compensated, and enters the sensing fiber sound emission demodulation device. By adopting the fusion perception system, pure overlapping of the conventional simple technologies is broken through on the aspects of mechanism and practical engineering application; a femtosecond laser optical frequency comb technology is introduced and fused with a sound emission technology, and Rayleigh ejection scattering and Brillouin scattering are separated, so that sound emission waves are perceived in a grading way; a multi-device multi-module and multi-component fusion system consisting of the sensing fiber temperature-sensitive compensation device and the optical fiber sound emission demodulation device has the advantages of spatial positioning, whole-process distribution, high spatial resolution, high detection accuracy, quantitative detection and the like, and has great advantages on the aspects of lowering the monitoring cost, increasing the monitoring accuracy, improving the engineering practical performance, and the like.
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Description

technical field

[0001] The invention relates to a distributed sensing optical fiber acoustic emission fusion sensing system and an operating method, belonging to the field of safety monitoring and detection of water engineering structures. Background technique

[0002] Due to the invention of laser and optical fiber, optical fiber technology has achieved world-renowned success. Driven by optical communication technology, the research and development of various optical fibers, devices, components, instruments and mechanical devices have made great progress. As we all know, light wave is a kind of electromagnetic wave. When the electromagnetic wave is incident into a medium such as an optical fiber, the incident electromagnetic wave will interact with the molecules or atoms that make up the material, thereby generating a scattering spectrum. The common ones are Rayleigh scattering and Brillouin scattering. Scattering, by using the scattered light information, people have devel...

Claims

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