Optical fiber sensing method, optical fiber sensing device and using method of optical fiber sensing device

An optical fiber sensing and fiber grating technology, applied in the fields of microwave photonics and optical fiber sensing, can solve the problems of limited measurement range, poor sensing accuracy, and low optical wavelength detection accuracy, and achieve high sensing accuracy, large Effect of measuring range

Active Publication Date: 2012-07-25
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF8 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Limited by the fineness of the Fabry-Perot interferometer (generally less than 1000) and the scan step size (generally greater than 7.5MHz), the detection accuracy of the light wavelength of the device is not high, so the sensing accuracy is poor and the measurement range is limited. limit

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
  • Optical fiber sensing method, optical fiber sensing device and using method of optical fiber sensing device
  • Optical fiber sensing method, optical fiber sensing device and using method of optical fiber sensing device
  • Optical fiber sensing method, optical fiber sensing device and using method of optical fiber sensing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0029] Optical fiber sensing device of the present invention, its structure is as figure 2 shown, including:

[0030] A microwave frequency sweep source for generating microwave signals with tunable frequency;

[0031] A narrow linewidth laser for generating a narrow linewidth optical carrier signal;

[0032] A broadband optical single sideband modulator, the optical input port of which is connected to the narrow linewidth laser, and the microwave input port is connected to the output port of the microwave frequency sweep source;

[0033] A narrowband fiber grating sensor whose input port is connected to the output port of the broadband optical single sideband modulator;

[0034] The optical detector is used to receive the optical single sideband signal transmitted by the narrowband fiber grating sensor and convert it into a microwave signal;

[00...

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 an optical fiber sensing method, an optical fiber sensing device and a using method of the optical fiber sensing device. In the optical fiber sensing method disclosed by the invention, a transmission function curve of an optical fiber grating is obtained by adopting a method for ensuring an optical single side band sweep frequency signal modulated by a microwave sweep frequency signal to pass through the optical fiber grating. The optical fiber sensing device disclosed by the invention comprises a microwave sweep frequency source, a narrow linewidth laser, a broadband single side band modulator, a narrow-band optical fiber grating sensor, an optical detector, a microwave amplitude-phase information extraction module, a data processing control module and a display module. The invention also discloses the using method of the optical fiber sensing device. Compared with the prior art, the optical fiber sensing method and the optical fiber sensing device have high sensing accuracy and large measurement range and the distributed sensing can be implemented by adopting a mode that a plurality of narrow-band optical fiber gratings with different stop-band center wavelengths are cascaded.

Description

technical field [0001] The invention relates to an optical fiber sensing method and an optical fiber sensing device, in particular to an optical fiber sensing method and an optical fiber sensing device based on a narrowband fiber grating, and belongs to the technical fields of optical fiber sensing and microwave photonics. Background technique [0002] Optical fiber sensing is to send the light from the light source into the sensing device through the optical fiber, and the sensing device changes the optical properties of the transmitted light (such as light intensity, wavelength, frequency, phase, polarization state, etc.) according to the parameters to be measured, and then analyzes The optical properties of the light passing through the sensing device are reversed to obtain the parameters to be measured. Optical fiber sensing has the advantages of high sensitivity and wide application range, but its measurement accuracy largely depends on the accuracy of optical detection...

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): G01D5/353
Inventor 潘时龙薛敏唐震宙祝宁华刘建国顾晓文梁洪刚韩威赵永久王超
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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