A dual-pulse optical fiber vibration sensing method based on time-delayed optical fiber

A technology of optical fiber vibration and sensing method, which is applied in the direction of instruments, measuring devices, and using wave/particle radiation, etc., can solve the problems of complex methods and high operating costs, reduce complexity, improve signal-to-noise ratio and sensitivity, and reduce system cost effect

Active Publication Date: 2021-05-28
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of complex traditional optical fiber sensing technology and high operating cost, and provide a dual-pulse optical fiber vibration sensing method based on time-delay optical fiber

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
  • A dual-pulse optical fiber vibration sensing method based on time-delayed optical fiber
  • A dual-pulse optical fiber vibration sensing method based on time-delayed optical fiber
  • A dual-pulse optical fiber vibration sensing method based on time-delayed optical fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention, that is, the described embodiments are only some of the embodiments of the present invention, but not all of the embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present ...

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 double-pulse optical fiber vibration sensing method based on a time-delay optical fiber, which belongs to the technical field of optical fiber sensing. In this method, two beams of probe light pulses with overlapping parts are formed by adding a time-delay fiber, and the demodulation of the phase change on the sensing fiber is realized from the interference signal of the Rayleigh scattered light of the two pulses, so as to obtain vibration information and realize Distributed multipoint sensing. This system omits coherent detection, interferometer and other structures, and extracts phase information through direct detection, which greatly simplifies system configuration, simple and fast demodulation method, reduces overall cost, and improves signal-to-noise ratio and sensitivity.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, and in particular relates to a dual-pulse optical fiber vibration sensing method based on a time-delay optical fiber. Background technique [0002] Distributed fiber optic sensors have become one of the research hotspots in the field of security and monitoring technology at home and abroad because they can measure in a large space and have many advantages such as high sensitivity, simple structure, and convenient use. Among them, the optical fiber distributed sensing system based on OTDR can realize the precise positioning of the time position of external vibration and the extraction of vibration information. It has the advantages of long sensing distance, high sensitivity, strong anti-electromagnetic interference ability, and small size, so it is widely used. It is used in oil and gas pipeline leak detection, peripheral security protection, structural health detection and other fie...

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 Patents(China)
IPC IPC(8): G01H9/00
CPCG01H9/006
Inventor 欧中华尹微裴雪超张婧蕾温钟平刘永
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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