Optical-fiber security early-warning polarization-phase combined control system

A technology of safety early warning and joint control, applied in optical fiber/cable installation, optics, measurement of vibration, etc., can solve problems such as unstable optical system, difficult to work effectively, signal blanking, etc.

Active Publication Date: 2010-04-07
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 system of this invention is unstable, and there is signal blanking caused by phase fading and polarization fading, which makes it difficult to work effectively

Method used

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  • Optical-fiber security early-warning polarization-phase combined control system
  • Optical-fiber security early-warning polarization-phase combined control system
  • Optical-fiber security early-warning polarization-phase combined control system

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Embodiment Construction

[0044] Embodiment. The specific embodiment of the present invention is described with this example and the present invention is described further. This example is an experimental prototype, its composition is as follows figure 1 , figure 2 shown. The thick connecting lines in the figure are optical fibers, and the thin connecting lines are electric wires. Concretely constitute as: the polarization modulator 202 is connected in series between the laser 101 connected by the optical fiber and the multiplexer / demultiplexer 203, the multiplexer / demultiplexer 203 is connected to a photoelectric signal processing circuit 309-1 with two-way input and output by two optical fibers The two optical input ports, the two electrical output ports of the photoelectric signal processing circuit 309-1 are respectively connected to the I / O ports of the polarization control host 201-1 and the phase control host 205-1, and the output port of the polarization control host 201-1 is connected to th...

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Abstract

The invention provides an optical-fiber security early-warning polarization-phase combined control system for the security protection and early warning of buried pipelines, structures or important facilities and regions, which relates to the technical field of mechanical vibration measurement, impact measurement and pipeline systems. A polarization modulator (202) is connected in serial between a continuous monochromatic laser (101) and a wave combining-dividing device (203); the wave combining-dividing device (203) is connected with two photoelectric detectors (309) and (310) through optical fiber; the output ends of the two photoelectric detectors (309) and (310) are connected with an A/D (312) and an A/D (313) respectively; the output ends of the A/D (312) and the A/D (313) are connected with photoelectric signal processing circuits (311) respectively; the output end of one photoelectric signal processing circuit (311) is connected with a polarization controller (201); the output end of the polarization controller (201) is connected with the polarization modulator (202) and a phase modulator (206) connected in serial with optical fiber (1) or (2); the output of the other photoelectric signal processing circuit (311) is connected with a phase controller (205); and the output of the phase controller (205) is connected with the phase modulator (206) connected in serial with the optical fiber (1) or (2).

Description

technical field [0001] The invention relates to an optical fiber safety early warning polarization and phase combined control system for safety protection and early warning of buried pipelines or structures or important facilities and areas, and relates to the technical fields of mechanical vibration measurement, impact measurement and pipeline systems. Background technique [0002] 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 with high transaction value. In our country, at least thousands of kilometers of pipelines are built every year. It can be said that pipelines are the main arteries of energy transportation. O...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/50G02F1/01G01H1/00G01P15/00
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范向红
Owner BC P INC CHINA NAT PETROLEUM CORP
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