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Distributed optical fiber vibration sensor based on relay amplifying and sensing technology and method thereof

A distributed optical fiber and vibration sensor technology, applied in optics, instruments, light demodulation, etc., can solve problems such as inability to achieve accurate positioning, and achieve the effects of enhancing confidentiality, increasing measurement distance, and improving vibration measurement accuracy.

Inactive Publication Date: 2010-09-22
SHANGHAI BOOM FIBER SENSING TECH
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Problems solved by technology

[0005] In order to solve the problem that the existing distributed optical fiber vibration sensing device cannot achieve accurate positioning during ultra-long-distance measurement, the present invention provides a distributed optical fiber vibration sensor based on relay amplification sensing technology

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  • Distributed optical fiber vibration sensor based on relay amplifying and sensing technology and method thereof
  • Distributed optical fiber vibration sensor based on relay amplifying and sensing technology and method thereof
  • Distributed optical fiber vibration sensor based on relay amplifying and sensing technology and method thereof

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Embodiment Construction

[0035] This embodiment provides a distributed optical fiber vibration sensor based on optical remote sensing relay amplification technology and a sensing method thereof. The present invention will be described in detail below with reference to the accompanying drawings.

[0036] The remote distributed optical fiber vibration sensor includes a demodulator and a transmission cable, and the demodulator includes: a narrow linewidth light source 1, an electro-optic modulator 2, a narrow pulse driver 3, an optical amplifier 4, an optical fiber circulator 5, and a polarization beam splitter 6. First optical receiving module 7, second optical receiving module 8, dual-channel AD collector 9, vibration signal analysis and processing system 10, pump laser light source 15, optical remote sensing relay amplification sensing optical module G, optical passive module 14. 2×2 fiber coupler 11, fiber isolator 12, fiber circulator 13.

[0037] The output end of the narrow linewidth light source ...

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Abstract

The invention discloses a distributed optical fiber vibration sensor based on the relay amplifying and sensing technology and a method thereof, belonging to the technical field of optical fiber vibration sensing. The system comprises a light source, an electro-optical modulator, a pulse driver, a light amplifier, a circulator, a polarizing beam splitter, a collector and a signal analysis processing system. The sensor is characterized in that the system also comprises a pumping laser light source and an optical remote sensing relay amplifying and sensing optical module. The pumping laser light source is arranged in the distributed optical fiber vibration sensing demodulation device and the optical remote sensing relay amplifying and sensing optical module is embedded between multistage sensing fibers. The passive optical modules of the pumping laser light source and optical remote sensing relay amplifying and sensing optical module perform long-distance connection through transmission fiber to form the light amplifier, the gain of the optical remote sensing relay amplifying and sensing optical module is utilized to overcome fibre loss, increase the intensity of the spontaneous Rayleigh scattering light of the optical fibre, enhance the signal-to-noise ratio of the distributed optical fiber vibration sensing system, enlarge the transmission distance of the system and increase the measurement accuracy of vibration events in the target area. The system is mainly used in the fields requiring long-distance measurement vibration signals such as perimeter safety precaution, border precaution, seismic detection and tsunami early warning.

Description

technical field [0001] The invention relates to the field of distributed optical fiber vibration sensing, in particular to a distributed optical fiber vibration sensor based on relay amplification sensing technology. The invention also relates to a vibration sensing method of a distributed optical fiber vibration sensor based on relay amplification sensing technology. Background technique [0002] Sensing and alarming systems such as perimeter security, border protection, earthquake detection, and tsunami early warning play a huge role in ensuring the stability of people's lives and protecting the safety of people's lives and property, and the essence of such signals is the detection and analysis of vibration signals. With the development of optical devices and optical communication technology, more and more optical fiber sensing technology is used in the field of sensing, gradually replacing some traditional electrical sensors. [0003] At present, distributed optical fibe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H9/00G02F2/00
Inventor 杨斌皋魏席刚仝芳轩周正仙
Owner SHANGHAI BOOM FIBER SENSING TECH
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