Mounting method of fiber Bragg grating sensor

A grating sensor, fiber Bragg technology, applied in mechanical equipment, connecting components, etc., can solve the problems of easily damaged sensor, insufficient strain transmission, poor repeatability, etc., to achieve stable strain sensitivity coefficient, ensure validity and reliability, strain transmission. high rate effect

Active Publication Date: 2014-09-10
CHINA AIRPLANT STRENGTH RES INST
View PDF6 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the great difference in the structure and sensing principle of the fiber Bragg grating sensor and the resistive strain gauge, the effect of the existing pasting method in practical application is very unsatisfactory, and there are many defects, such as insufficient strain transmission, compression strain Problems such as inaccurate measurement, poor repeatability, unstable strain sensitivity coefficient, and easy damage to 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
  • Mounting method of fiber Bragg grating sensor
  • Mounting method of fiber Bragg grating sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention will be described in further detail below by means of specific embodiments:

[0023] The study found that the average strain transfer rate of the sensor decreases with the increase of the thickness of the adhesive layer, and increases with the increase of the bonding length, and the greater the elastic modulus of the adhesive layer, the greater the average strain transfer rate. Therefore, it is necessary to comprehensively consider various factors affecting the strain transfer, not only to ensure a high strain transfer rate, but also to ensure the consistency and stability of the strain sensitivity coefficient, and to make the sticking length as small as possible.

[0024] To ensure a high strain transfer rate, it is necessary to reduce the paste thickness and increase the paste length, but the paste length should not be too long. After analysis and test verification, the strain transfer rate is higher when the paste length is 20-25 mm. To ensure t...

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 belongs to the fiber Bragg grating sensor application technology and relates to a mounting method of a fiber grating sensor. The mounting method of the fiber grating sensor obtains a fiber grating sensor adhering process which has ideal strain transmitting effects, good repeatability and high stability by combining analysis results of a strain transmitting theory of a sensor, selecting a variety of adhesives, using different processes for adhering the sensor and verifying the adhering effects through a standard beam test. Further, the fiber grating sensor is adhered by controlling key factors such as the elastic modulus of the adhesives, the adhering length and the adhering layer thickness which affect the strain transmitting rate of the fiber grating sensor, so that the obtained fiber grating sensor has high strain transmitting rates, good repeatability and stable strain sensitivity coefficients, can accurately measure the true strain of monitoring sites and ensures the effectiveness and reliability of the monitoring results.

Description

technical field [0001] The invention belongs to the application technology of optical fiber Bragg grating sensors, and relates to an installation method of optical fiber Bragg grating sensors. Background technique [0002] Fiber Bragg Grating sensor (Fiber Bragg Grating, FBG) is an optical sensing element with excellent performance developed in recent years. Strain measurement in engineering structures. Compared with conventional resistive strain gauges, the fiber grating sensor has the advantages of strong anti-electromagnetic interference and long-term stability, especially suitable for long-term monitoring of structural strain. When measuring strain, it is necessary to paste the fiber grating sensor on the structure under test, and the fiber grating sensor is a cylinder with a small diameter (125 μm). When pasting, there is a line contact between the sensor and the structure under test, which gives The pasting of the sensor brings difficulties, and the improper pasting ...

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): F16B11/00
Inventor 黄博肖迎春白生宝贾淑红李野刘国强李明陈霞
Owner CHINA AIRPLANT STRENGTH RES INST
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