Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Long-distance, high-spatial-resolution sensing method based on collaboration of MZI sensing and Brillouin sensing

A high spatial resolution, sensing method technology, applied in the field of distributed optical fiber sensing, can solve problems such as only reaching 100 meters, restricting the application in the field of structural health monitoring, etc., to improve the measurement rate and space, and eliminate the spatial resolution Contradictions with measurement accuracy, the effect of improving spatial resolution

Active Publication Date: 2016-06-29
广东恒志信息技术有限公司
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dynamic response capability of interferometric optical fiber sensing is good, but the spatial resolution can only reach about 100 meters, which restricts its application in the field of structural health monitoring

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
  • Long-distance, high-spatial-resolution sensing method based on collaboration of MZI sensing and Brillouin sensing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] (1) The laser light from the narrow-linewidth laser (10) passes through the optical coupler (13) and then splits into two, respectively entering the optical modulator (12) and the optical coupler (15).

[0024] (2) The light from the optical modulator (12) enters the optical coupler (4) through the optical modulator (11), and then splits into two into the sensing optical fiber (5) and the reference optical fiber (9). The states of the light modulator (12) and the light modulator (11) depend on the signal processing and control unit (17).

[0025] (3) The light coming out of the sensing fiber (5) and the reference fiber (9) passes through the optical coupler (6), enters the optical coupler (15) through the return fiber (16), and then reaches the photodetector (14).

[0026] (4) The light entering the optical coupler (15) from the optical coupler (13) passes th...

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 long-distance and high spatial resolution sensing method based on the cooperation of MZI sensing and Brillouin sensing. The MZI sensor first obtains the abnormal area of ​​temperature or strain, and then the measurement range of Brillouin sensing Set in the abnormal area determined by MZI sensing. It combines the superior performance of MZI sensing and Brillouin sensing. Therefore, combining MZI can eliminate the contradiction between spatial resolution and measurement accuracy in Brillouin sensing. At the same time, the measurement range of the Brillouin sensor is determined by the spatial resolution of the MZI for each measurement. Using the fast response capability of MZI sensing, it is possible to determine the approximate area where temperature or strain occurs. According to the temperature or strain abnormal area determined by MZI sensing, the Brillouin sensing measurement range is determined in the above area, so that the measurement rate and spatial resolution of the distributed optical fiber sensing system can be greatly improved.

Description

technical field [0001] The invention relates to a long-distance, high spatial resolution distributed optical fiber sensing method based on the cooperation of MZI sensing and Brillouin sensing. Background technique [0002] The invention is proposed aiming at the problems existing in the distributed optical fiber sensing technology with long distance and high spatial resolution. [0003] In distributed optical fiber sensing, there are mainly two methods: interference type and scattering type. [0004] Interferometric optical fiber sensing mainly includes distributed optical fiber sensing based on the Sagnac effect and Mach-Zehnder interferometer (MZI) distributed optical fiber sensing. The dynamic response capability of interferometric optical fiber sensing is good, but the spatial resolution can only reach about 100 meters, which restricts its application in the field of structural health monitoring. [0005] Scattering sensing mainly includes distributed optical fiber sen...

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): G01K11/32G01B11/16G01K11/322
Inventor 万生鹏高鹏何兴道
Owner 广东恒志信息技术有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com