Unlock instant, AI-driven research and patent intelligence for your innovation.

Fiber bragg grating inclinometer and inclinometry algorithm

A technology of optical fiber grating and inclinometer, which is applied in the direction of measuring inclination, instrument, measurement, etc. It can solve the problems of not small enough size, high price, high price of fiber optic gyroscope, etc., and achieve strong anti-interference ability, light weight, easy to realize multiple Effect of parameter sensing measurements

Inactive Publication Date: 2013-06-05
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high price of the fiber optic gyroscope itself and the limited size, this "all fiber optic digital inclinometer" has the disadvantages of high overall price and not small enough volume

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
  • Fiber bragg grating inclinometer and inclinometry algorithm
  • Fiber bragg grating inclinometer and inclinometry algorithm
  • Fiber bragg grating inclinometer and inclinometry algorithm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] like figure 1 , figure 2 shown. A fiber grating inclinometer is manufactured, comprising a light source 1 , a wavelength demodulation device 2 , an optical splitter 3 and an inclinometer 4 .

[0057] The inclinometer 4 includes a hollow conduit 41 and a fiber grating 42 . An optical fiber 421 is attached to the inner surface of the hollow conduit 41 in parallel along the axial direction; a strain measurement grating 422 is connected to the optical fiber 421 .

[0058] The light source 1 and wavelength demodulation device 2 of the fiber grating inclinometer are connected to the same side of the optical splitter 3;

Embodiment 2

[0060] like image 3 , Figure 4 shown. A fiber grating inclinometer is processed, the same as that in the first embodiment will not be repeated, and the difference is:

[0061] Three optical fibers 421 are attached to the inner surface of the hollow conduit 41 in parallel along the axial direction, and the three optical fibers 421 are equidistant from each other. A strain measurement grating 422 is connected to each optical fiber 421, and the fixed grating area is located at the center of the hollow conduit 41, and the position of the strain measurement grating 422 connected to each optical fiber 421 corresponds to the same position. A temperature compensation grating 423 is also connected to one of the optical fibers 421 . The three optical fibers 421 are drawn out and connected to the other side of the optical splitter 3 by using armored optical cables 4221 respectively.

Embodiment 3

[0063] like Figure 5 shown. A fiber grating inclinometer is processed, the same as that in the second embodiment will not be repeated, and the difference is:

[0064] A plurality of strain measurement gratings 422 are connected in series on each optical fiber 421 at equal distances, and the series spacing is 10 cm. The positions of the serial strain measurement gratings 422 on each optical fiber 421 correspond to the same.

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 fiber bragg grating inclinometer and a corresponding inclinometry algorithm. Aiming at the defects that an optical fiber digital inclinometer in the prior art has a large volume and a high cost, is difficult for measuring the deformation in a soil body, and the like, the invention provides the fiber bragg grating inclinometer and the matched corresponding inclinometry algorithm. A fiber bragg grating sensor of the inclinometer is arranged in an inclination gauge of the inclinometer, the change characteristics of the inclination angle of the inclinometer is obtained by measuring the changes of the fiber bragg grating reflective wavelength, and the numerical value of the deformation and the displacement of the soil body is obtained through calculation. Further, theinclination gauge of the inclinometer is designed into a hinge structure with spaced rigid pipes and flexible pipes, which is more favorable for measuring nonlinear large deformations of the soil body. The invention simultaneously provides the inclinometry algorithm matched with the hinge structure shaped fiber bragg grating inclinometer. Compared with the prior art, the inclinometer has the advantages of simple structure, convenient processing, easy use and operation, economical cost, strong interference resistance and wide application range, and the matched inclinometry algorithm has concise calculation steps and an accurate result.

Description

technical field [0001] The invention relates to an inclinometer and an inclinometer algorithm, in particular to an inclinometer using a fiber grating sensor as a measurement component and a corresponding inclinometer algorithm. Background technique [0002] An inclinometer is an in-situ monitoring instrument that measures the inclination and azimuth of boreholes. Since the 1950s, it has been used in the field of in-situ monitoring of geotechnical engineering such as earth-rock dams, roadbeds, slopes and tunnels, and has been widely used in water conservancy and hydropower, mining and metallurgy, transportation and urban construction geotechnical engineering. Geotechnical engineering design, construction and safety of use. The main types are resistance strain type, accelerometer type and electronic meter type. The main measurement components of inclinometers used at home and abroad are the use of fluxgate sensors or mechanical gyroscopes as angular velocity sensors combined...

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): G01C9/00E21B47/02
Inventor 朱颖彦张碧华
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com