Unlock instant, AI-driven research and patent intelligence for your innovation.

Distributed type optical fiber vibration sensing system

A distributed optical fiber and vibration sensing technology, applied in the field of sensing, can solve problems such as limited dynamic range, complex optical path, and distortion of demodulation results.

Active Publication Date: 2014-01-22
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the passive demodulation scheme of 3×3 fiber coupler interference, PGC technology has the disadvantages of demodulation result distortion, limited

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Distributed type optical fiber vibration sensing system
  • Distributed type optical fiber vibration sensing system
  • Distributed type optical fiber vibration sensing system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Combine below figure 1 and figure 2 The present invention is further described.

[0021] like figure 1 As shown, a distributed optical fiber sensing system includes: a narrow linewidth laser 1, an optical amplifier 2, an optical splitter 3, a first polarization processor 4, a second polarization processor 5, and a first circulator 6. The second circulator 7, the first coupler 8, the second coupler 9, the first polarization control unit 13, the second polarization control unit 14, the first photodetector group 10, the second photodetector group 11 and Display unit 15. Example by figure 1 Make connection lines.

[0022] The narrow linewidth laser (1) is used as the system light source to emit narrow linewidth signal light; the optical amplifier (2) is used to amplify the narrow linewidth signal light, so that the intensity of the amplified optical signal meets the system requirements; the optical splitter (3), the output optical signal of the optical amplifier is s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a distributed type optical fiber vibration sensing system comprising a narrow line width laser, an optical amplifier, an optical divider, a first polarization processor, a second polarization processor, a first circulator, a second circulator, a first coupler, a second coupler, a first polarization control unit, a second polarization control unit, a first photoelectric detector group, a second photoelectric detector group, a single processing unit and a display unit. Compared with systems in the prior art, beneficial effects of the distributed type optical fiber vibration sensing system are that: the first circulator and the second circulator are introduced into an optical path so that a brand new optical path form is formed; and the distributed type optical fiber vibration sensing system with the technical scheme of double M-Z interferometers is designed based on the brand new optical path form so that the system has functions of acquiring target information without distortion, identifying target information, and finally forming an alarm output function.

Description

technical field [0001] The invention relates to the field of sensing, in particular to a distributed optical fiber vibration sensing system. Background technique [0002] It is of great practical significance to discover and locate the intrusion behavior in time in the modern security defense system. Traditional security systems mainly include camera video recognition, infrared sensors, and geomagnetic sensors. These detection methods are limited by equipment power supply, short monitoring distance, weak anti-electromagnetic interference ability, and high maintenance cost. The distributed optical fiber vibration sensing system can measure the vibration information of the entire optical fiber length with time. It has the advantages of long detection distance, strong anti-electromagnetic interference ability, and easy maintenance after installation. It has become one of the most promising technologies in the field of defense systems. one. [0003] With the advancement of op...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01H9/00
Inventor 王延穆立波刘斌禄姚剑段汉卿李新欣
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP