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All-sensing interference -type light time domain reflectometer

An optical time domain reflectometer and interferometric technology, which is applied in the direction of transmitting sensing components, instruments, cladding optical fibers, etc. by using optical devices

Inactive Publication Date: 2008-10-22
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese invention patent applications 200410020046.6, 200410040282.4, 200610113044.0, 200510023104.5, 200610090594.5, 200710051004.2, etc. constitute a closed loop to achieve interference conditions to detect small vibrations, but these interferometric methods can only detect one point on the entire sensing path. If two or more points appear on the screen at the same time, nothing can be done

Method used

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  • All-sensing interference -type light time domain reflectometer
  • All-sensing interference -type light time domain reflectometer
  • All-sensing interference -type light time domain reflectometer

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Embodiment Construction

[0033] For purposes of summarizing the invention, certain aspects, advantages and novel features of the invention are described herein. It is to be understood that not necessarily all such advantages can be achieved in accordance with a particular embodiment of the invention. Accordingly, the invention is not to be limited to any particular embodiment disclosed.

[0034] Embodiments of the present invention are as follows:

[0035] The implementation plan is to safely monitor long-distance building corridors of 5,000 meters. This example is an experimental prototype, and its composition is as follows figure 2shown. The thick connecting wires in the figure are optical fibers, provided by Chengdu Zhongzhu Optical Cable Co., Ltd., and the thin connecting wires are electric wires. The computer [1] is a PC104 system, the light source driver [2], and the circuit processing board with a detector [5] are a 100MHz10bit A / D chip, a PIN detector, a driving circuit, a processing circu...

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Abstract

The invention discloses a full sensing interference-type optical time domain reflectometer. The full sensing interference-type optical time domain reflectometer comprises an optical signal emitting and receiving processing module [100] and a sensing fiber [101] and a sensing fiber [102]; the optical signal emitting and receiving processing module [100] comprises a computer [1], a light source driver [2], a light source [3], a detector [4], a circuit processing board [5] with the detector and a fiber coupler [6]; and two circuits of the sensing fiber [101] and the sensing fiber[102] form a cable and realize the long-distance distributed vibration, impact detection and positioning. A single full sensing interference-type optical time domain reflectometer is additionally provided with an optical switch for carrying out multichannel periodic check and measurement and monitoring to the phenomena of large-area vibration and impact. A plurality of reflectometers are connected to the Internet to realize remote intelligent monitoring.

Description

technical field [0001] The invention discloses a full-sensing interference type optical time domain reflectometer, relates to distributed measurement of vibration and impact, and belongs to the technical field of safety prevention. Background technique [0002] Maintaining the security of infrastructure is a basic requirement for social stability and rapid economic development. Safety monitoring of infrastructure such as communication cables, high-voltage power grids, oil pipelines, gas pipelines, bridges, dams, and buildings to determine health, maintenance needs, life expectancy, and other characteristics is not only a guarantee for the technical functions of these facilities, It is an effective means to avoid major economic losses and maintain social stability and development. [0003] In recent years, the absolute security of optical fiber information transmission has been broken, and eavesdropping incidents on terrestrial optical cable lines have been reported frequent...

Claims

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Application Information

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IPC IPC(8): G01H9/00G01D5/353F17D5/02G02B6/26G02B6/02
Inventor 张利勋刘永智代志勇欧中华彭增寿
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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