Distribution-type fiber vibration sensor system based on phase detection and optical time domain reflection

A vibration sensing system and distributed optical fiber technology, which are applied in the direction of using optical devices to transmit sensing components, measuring devices, using wave/particle radiation, etc., can solve problems such as low positioning accuracy, and achieve the effect of improving sensitivity and positioning ability.

Inactive Publication Date: 2009-10-28
江西华神智能物联技术有限公司
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Problems solved by technology

Due to the use of phase detection technology, this scheme has high detection sensitivity, but the positioning accuracy of this scheme for vibration events is relatively low

Method used

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  • Distribution-type fiber vibration sensor system based on phase detection and optical time domain reflection
  • Distribution-type fiber vibration sensor system based on phase detection and optical time domain reflection
  • Distribution-type fiber vibration sensor system based on phase detection and optical time domain reflection

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Embodiment Construction

[0019] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] See figure 1 The optical fiber vibration sensing system based on phase detection and optical time domain reflection provided by the present invention includes a computer 1, a data processor 2, a synchronization controller 3, a laser driver 4, a laser 5, a remote optical module 6, a photoelectric The converter 7, the amplifier 8 and the collector 9, further including a timing controller 10 connected with the synchronization controller 3 and the collector 9, and a sensing optical cable D connected with the remote optical module 6, the collector 9 and the data processor 2Connect. Among them, the computer 1 and the sensing optical cable D are peripheral devices, and other devices are enclosed in a box. The computer 1 communicates with the data processor 2 through the data communication interface to read the internal data, and displays it on...

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Abstract

The invention discloses a distribution-type fiber vibration sensor system based on phase detection and optical time domain reflection, comprising a sensing optical cable, a far end optical module connected with the sensing optical cable and capable of forming interference optical signals, a laser module used for providing laser signals to the far end optical module, a photoelectric conversion unit used for converting the formed interference optical signals into electric signals, a collector used for collecting the electric signals, a control unit used for controlling the laser module and providing time to the collecting unit simultaneously, and a data processor used for processing the collected electric signals and the recorded colleting time so as to determine the phase of the corresponding interference optical signals, thus determining the vibration of the sensing optical cable and the vibration position. The distribution-type fiber vibration sensor system has the beneficial effects of greatly improving the sensitiveness and location capability of the vibration sensor system and capable of detecting and positioning the extremely weak external vibration signals.

Description

Technical field [0001] The invention relates to the field of optical fiber sensing, in particular to a distributed optical fiber vibration sensing system based on phase detection technology and optical time domain reflectometer technology. Background technique [0002] Optical fiber sensing has been widely used in various fields of national defense and industry, security systems and national defense border security monitoring. Optical fiber vibration sensing system has become a hot spot in recent research due to its high sensitivity, immunity to electromagnetic interference, and low cost. [0003] At present, the distributed optical fiber vibration sensing system that has been extensively studied is divided into two types: a sensing system based on optical time domain reflectometry (OTDR) technology and a sensing system based on phase detection technology. The distributed optical fiber vibration sensing system based on optical time domain reflectometer (OTDR) technology uses the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H9/00G01D5/26
Inventor 齐龙舟刘亮陈宇飞皋魏席刚尚利军周正仙仝芳轩
Owner 江西华神智能物联技术有限公司
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