Optical fiber multi-domain sensing system and demodulation method

A technology of sensing system and demodulation method, which is applied in the direction of using optical devices to transmit sensing components, etc., to achieve the effect of eliminating voltage jitter, facilitating complex processing, and ensuring precise control

Inactive Publication Date: 2015-12-30
HUAZHONG UNIV OF SCI & TECH
View PDF7 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to propose a system and method related to providing high-resolution spectrum demodulation, time-domain pulse demodulation, and spectrum information demodulation for an optical fiber sensor network based on spectrum demodulation, making up for the existing The defect that the optical fiber sensing demodulation device cannot demodulate the large-capacity multi-domain microstructure sensing network,

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 multi-domain sensing system and demodulation method
  • Optical fiber multi-domain sensing system and demodulation method
  • Optical fiber multi-domain sensing system and demodulation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] The present invention provides an optical fiber multi-domain sensing demodulation system based on an adjustable FP filter, such as figure 1 As shown, the optical fiber multi-domain sensing demodulation system includes a broadband light source 1, a data processing module 2, an I / O transmission bus 3, a DA module 4, an AD module 5, an FPGA module 6, an optical pulse modulation module 7, and an adjustable FP filter Device 8, microstructure sensing unit 9, circulator 10, detector 11, spectral calibration device 12, time-delay optical fiber 13, receiving circuit 14, driving circuit 1,5. The broadband light source is connected with the optical pulse modulation module, and the continuous light is modulated into pulsed light, which is input to the spectral calibration device through the port 1 of the circulator. The optical pulse signal passed through the calibration device is transmitted to the microstructured optical fiber after passing through the time-delayed optical fiber....

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 relates to an optical fiber multi-domain sensing system and a demodulation method. The system comprises a sensing system light path which is mainly composed of a broadband light source, a light pulse modulation module, an adjustable FP filter, distributed microstructure sensing optical fibers, a circulator, a spectral calibration device and a time-delay optical fiber; a sensing system signal generation and data acquisition unit which is composed of a DA module, an AD module, an FPGA module, a detector, a receiving circuit and a driving circuit; and a data transmission processing unit which is composed of a data processing module and an I / O transmission bus. High-speed, high-precision and broadband demodulation of wavelength domain, frequency domain, time domain and other multi-domain information of light sensing signals can be realized so that the optical fiber multi-domain sensing system has advantages of small size, compact and stable structure and high reliability.

Description

technical field [0001] The invention relates to the field of optical fiber sensing, in particular to a multi-dimensional multiplexing optical fiber sensing system and a demodulation method for multi-domain information such as optical signal wavelength, frequency and time delay. Background technique [0002] Distributed optical fiber sensing network has the advantages of high sensitivity, wide frequency range, large dynamic range of measurement, anti-electromagnetic interference, pressure resistance and corrosion resistance, light weight, small size, and long sensing distance. It is widely used in large buildings such as stadiums and bridges. in health monitoring. In coal mines, oil pipelines, long-distance transmission lines and other application scenarios, the advantages of optical fiber sensor networks for long-distance sensing and large-capacity sensor nodes make them irreplaceable by other sensors and sensor networks. Moreover, increasing the number of sensing nodes in ...

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 孙琪真艾凡李晓磊程建伟刘德明
Owner HUAZHONG UNIV OF SCI & TECH
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