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

FBG sensor sensitivity improving method based on cantilever structure

A cantilever beam and sensitivity technology, which is applied in the field of improving the sensitivity of FBG sensors based on cantilever beam structure, can solve problems such as low temperature and strain sensitivity, affecting sensor performance, and complex layout process, so as to improve sensing sensitivity and realize multi-parameter transmission Sensitive measurement and high measurement accuracy

Active Publication Date: 2016-05-11
ANHUI CASZT PHOTOELECTRIC MEASUREMENT & CONTROL TECH CO LTD
View PDF7 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main component is SiO 2 The bare grating is small and brittle, especially the shear resistance is very poor, and it has encountered many problems in the practical engineering application directly as a sensor, such as low temperature and strain sensitivity, easy damage, complex layout process, etc.
And the central wavelength of FBG has a cross-sensitive effect on temperature and stress, which affects the performance of the sensor

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
  • FBG sensor sensitivity improving method based on cantilever structure
  • FBG sensor sensitivity improving method based on cantilever structure
  • FBG sensor sensitivity improving method based on cantilever structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] Such as figure 1 As shown, a method for improving the sensitivity of a FBG sensor based on a cantilever beam structure comprises the following steps:

[0029] S1. Open a through hole at an appropriate position of the cantilever beam, and make the through hole symmetrical with respect to the central axis of the cantilever beam;

[0030] Select a cantilever beam of appropriate size and shape, and drill holes in the appropriate position on the cantilever beam. The shape of the hole is rectangle, rhombus, circle, triangle, etc.

[0031] Such as figure 2 As shown, choose to manufacture a relatively simple equal-section cantilever beam, and manufacture a square through hole in its center, one end of which is fixed, and the other end is used to apply the load to be measured.

[0032] S2. Taking the direction perpendicular to the section of ...

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 provides an FBG sensor sensitivity improving method based on a cantilever structure. The method comprises the steps of: forming a through hole in a suitable position of the cantilever; determining the maximum part of two positive strains and the maximum part of two negative strains of the cantilever at present; bonding one FBG to the maximum part of two positive strains and the maximum part of two negative strains of the cantilever respectively; and superposing spectrums of the two FBGs and utilizing an FBG spectrum broadening effect to carry out sensing demodulation on the two FBGs. According to the invention, a simple punching method is utilized to add strain changes, and the ingenious design of the bonding positions of the FBGs and the suitable demodulation mode are adopted, so that the sensing sensitivity is improved, and temperature self-compensation and multi-parameter sensing measurement are realized; in addition, the FBG sensor sensitivity improving method has the advantages that the interference resistance is high, the long-term drifting is small, the measuring precision is high, and flow measurement under severe industrial environments such as high temperature, high pressure and high electromagnetic interference can be realized.

Description

technical field [0001] The invention relates to the technical field of fiber grating sensing, in particular to a method for improving the sensitivity of an FBG sensor based on a cantilever beam structure. Background technique [0002] In 1978, K.O.HILL and others from Ottawa Communication Research Center in Canada first discovered the photosensitive effect of optical fiber in germanium-doped silica optical fiber, and used the standing wave writing method to make the world's first fiber Bragg grating (FBG). FBG sensor has the advantages of small size, low loss, high sensitivity, anti-electromagnetic interference, good electrical insulation, wide bandwidth, etc., and can realize multi-point distributed measurement. It has been applied in bridges, mines, tunnels, dams, buildings, Fruitful results have been achieved in ship systems, marine, aviation, medical fields, power systems, etc. [0003] The main component is SiO 2 The bare grating is small and brittle, especially the s...

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): G01D5/26G01D5/353
CPCG01D5/268G01D5/35316
Inventor 董凤忠杨爽李俊徐胜明朱莉莎汤玉泉孙苗董坤
Owner ANHUI CASZT PHOTOELECTRIC MEASUREMENT & CONTROL TECH CO LTD
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