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Optical fiber vibration detection system and optical fiber vibration detection method

A fiber optic vibration and detection system technology, which is applied in the direction of measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve the problems of prolonging the detection distance and waste of resources, and achieve the goal of increasing the monitoring distance, solving the waste of resources, and improving the accuracy rate Effect

Active Publication Date: 2016-01-20
PIPECHINA SOUTH CHINA CO
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Problems solved by technology

[0004] By providing an optical fiber vibration detection system and an optical fiber vibration detection method, the present invention solves the technical problems of resource waste and limited effect of prolonging the detection distance in the prior art

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  • Optical fiber vibration detection system and optical fiber vibration detection method
  • Optical fiber vibration detection system and optical fiber vibration detection method
  • Optical fiber vibration detection system and optical fiber vibration detection method

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Embodiment Construction

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0026] refer to figure 1 As shown, an optical fiber vibration detection system provided by an embodiment of the present invention includes: an optical fiber vibration sensor 1, a host computer 2, a first sensing optical fiber 3, a second sensing optical fiber 4, and a remote gain module 5, wherein the optical fiber vibration The sensor 1 is conne...

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Abstract

The invention discloses an optical fiber vibration detection system and an optical fiber vibration detection method. An optical fiber vibration sensor is connected with a host computer, the optical fiber vibration sensor comprises a first circulator, N pumping light sources, and a first wavelength division multiplexer, the first circulator is connected with the first wavelength division multiplexer, the N pumping light sources are connected with the first wavelength division multiplexer, the first wavelength division multiplexer is connected to a remote gain module via a first sensing optical fiber, and the remote gain module is also connected with a second sensing optical fiber. Signal light emitted by the first circulator and pumping light emitted by the N pumping light sources enter the remote gain module via the first wavelength division multiplexer, and the pumping light is downloaded via the remote gain module for the amplification of the signal light. Therefore, the technical problem that the actual production requirement cannot be satisfied due to limited detection distance of the optical fiber vibration signal detection system is solved, and the accuracy of remote optical fiber vibration detection is improved.

Description

technical field [0001] The invention relates to the field of signal detection, in particular to an optical fiber vibration detection system and an optical fiber vibration detection method. Background technique [0002] Large-scale engineering structure health monitoring, oil pipeline protection, geological disaster prevention, etc. all need to collect vibration signals. The distributed optical fiber vibration sensor based on coherent Rayleigh technology (Φ-OTDR) has become a research hotspot because of its incomparable advantages over traditional sensors. . At present, this technology is mainly used in fence intrusion detection, long-distance oil and gas pipeline detection, border security and other fields, and has achieved good application results. However, with the extension of the detection distance, the optical signal becomes very weak, especially the backward Rayleigh The scattered light signal becomes extremely weak, which brings great difficulties to the detection of...

Claims

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Application Information

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IPC IPC(8): G01H9/00
Inventor 田孝忠周琰李金武孙巍王海明刘路王雪莉谭东杰邱红辉马云宾
Owner PIPECHINA SOUTH CHINA CO
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