Optical fiber vibration detection method and system based on foreign fiber remote pump amplifying

A fiber optic vibration and detection system technology, applied in measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve problems such as poor detection effect, weak optical signal, and prolongation

Inactive Publication Date: 2014-12-24
PETROCHINA CO LTD
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides an optical fiber vibration detection method and system based on different fiber remote pump amplification to solve the problem in the prior art that the optical signal used for detection is weak due to the prolongation of the detection distance when performing vibration detection, thereby causing Technical problems with poor detection results

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
  • Optical fiber vibration detection method and system based on foreign fiber remote pump amplifying
  • Optical fiber vibration detection method and system based on foreign fiber remote pump amplifying
  • Optical fiber vibration detection method and system based on foreign fiber remote pump amplifying

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] In order to enable those skilled in the technical field to which the application belongs to understand the application more clearly, the technical solutions of the application will be described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0021] Please see figure 1 , is an architecture diagram of a fiber optic vibration detection system based on remote pump amplification of different fibers.

[0022] The system includes: an optical fiber vibration sensor 11 based on coherent Rayleigh scattering technology, and the sensor 11 includes a three-port circulator 12; N remote pump amplifiers; sensing optical fiber 13; remote pumping optical fiber 14. In addition, the system further includes: N couplers.

[0023] A fiber optic vibration sensor 11 based on coherent Rayleigh scattering technology is used to provide a pumping light source.

[0024] The circulator 12 is used to provide a pulsed light source.

[0025] N remote pump...

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 an optical fiber vibration detection method and system based on foreign fiber remote pump amplifying. A foreign fiber remote pump amplifying mode is adopted, centralization amplifying is carried out on each sensing optical fiber, the phi-OTDR sensing distance can be effectively lengthened, optical signals for detection are strengthened, and the detection accuracy rate is improved.

Description

technical field [0001] The invention relates to the field of vibration signal detection, in particular to an optical fiber vibration detection method and system based on remote pump amplification of different fibers. Background technique [0002] Large-scale engineering structure health monitoring, oil pipeline maintenance, and geological disaster prevention all need to collect vibration signals. Distributed optical fiber vibration sensors have become a research hotspot due to their incomparable advantages over traditional sensors. Compared with the traditional distributed optical fiber vibration sensor, the distributed optical fiber vibration detection technology based on coherent Rayleigh scattering technology has the advantages of high positioning accuracy and high sensitivity, and has achieved rapid development. Coherent Rayleigh scattering technology, also known as phase-sensitive optical time-domain reflectometry (Φ-OTDR), uses the backward Rayleigh scattered light int...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G01H9/00
Inventor 孙巍周琰田孝忠谭东杰马云宾王海明刘路蔡永军邱红辉郭凤林
Owner PETROCHINA CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap