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Optical fiber safe early warning polarization control system

A polarization control and safety warning technology, applied in pipeline systems, measuring devices, instruments, etc., can solve the problems of signal blanking, instability, and difficulty in working effectively, and achieve the effect of monitoring stability

Active Publication Date: 2009-04-22
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention is a breakthrough for the safety warning of long-distance linear targets or large-area area targets, but the disadvantage is that the optical path system of this invention has signal blanking caused by phase fading and polarization fading, which is unstable and difficult to be effective Work

Method used

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  • Optical fiber safe early warning polarization control system
  • Optical fiber safe early warning polarization control system

Examples

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Embodiment Construction

[0032] Embodiment. This example is an experimental prototype, and its constitution is as figure 1 As shown, the circuit as figure 2 shown. The continuous monochromatic laser 101 is connected to the polarization scrambler 410 through an optical fiber, and then connected to the multiplexer / demultiplexer 204 and three optical fibers 1, 2, and 3 to form a Mach-Zehnder (Mach-Zehnder) fiber optic interferometer. The multiplexer / demultiplexer 203, and the multiplexer / demultiplexer 203 is respectively connected to the input of the polarizer 412 and the polarizer 413 by an optical fiber, and the output of the polarizer 412 and the polarizer 413 is connected to the polarization detector 407 and the polarization detector 408 The input, output of the polarization detector 407 and the output of the polarization detector 408 are both connected to the signal processing unit 411 by electrical signal lines.

[0033] Among them, the continuous monochromatic laser 101 selects the model: OHERA...

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Abstract

The invention relates to a fiber safety pre-warning polarization control system, comprising a first fiber (1), a second fiber (2) and a third fiber (3) which are embedded under the ground of embedding structures or important facilities and surrounding areas, a Mach-Zehnder optical interferometer consisting of a first multiplexer / demultiplexer (203), a second multiplexer / demultiplexer (204), the first fiber (1) and the second fiber (2), and a laser (101); the continuous single-colored laser (101) is connected with a polarization scrambler (410) by a fourth fiber and is connected with the first multiplexer / demultiplexer (203) by a fifth fiber; furthermore, the first multiplexer / demultiplexer (203) is respectively connected with a first polarization analyzer (412) and a second polarization analyzer (413) by a sixth fiber and a seventh fiber; the first polarization analyzer (412) and the second polarization analyzer (413) are respectively connected with a first polarization defector (407) and a second polarization defector (408) and then connected with a signal processing circuit (411) by electric signal wires.

Description

[0001] The present invention is a divisional application filed on June 30, 2006, with the application number 2006100905998, and the title of the invention is "optical fiber safety early warning polarization control system". technical field [0002] The invention relates to an optical fiber safety early warning polarization control system for safety protection and early warning of buried structures or important facilities and areas, and relates to the technical fields of mechanical vibration measurement, impact measurement and pipeline systems. Background technique [0003] For substances such as oil, natural gas, refined oil, coal slurry and water, pipeline transportation is a safe, economical and efficient transportation method, and it is playing an increasingly important role in the global transportation industry, especially in petroleum, finished products Oil and natural gas play an extremely important role in the transportation of flammable and explosive energy substances...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17D5/00F17D5/02G01H9/00
Inventor 张金权王小军焦书浩王飞方德学霍峰王赢闫会朋杨文明历宇林晓舒
Owner BC P INC CHINA NAT PETROLEUM CORP
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