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

Method and device for quasi-distributed multi-parameter measurement of fiber bragg grating F-P cavity array

A fiber grating and quasi-distributed technology, which is applied in the field of quasi-distributed multi-parameter measurement of fiber grating F-P cavity arrays, can solve problems such as difficult large-scale preparation, complex sensor structure, and difficulty in forming sensor arrays.

Active Publication Date: 2019-06-07
WUHAN UNIV OF TECH
View PDF26 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of sensor has a complex structure, is not easy to manufacture on a large scale, and is difficult to form a sensor array

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
  • Method and device for quasi-distributed multi-parameter measurement of fiber bragg grating F-P cavity array
  • Method and device for quasi-distributed multi-parameter measurement of fiber bragg grating F-P cavity array
  • Method and device for quasi-distributed multi-parameter measurement of fiber bragg grating F-P cavity array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In the embodiment of the present invention, such as figure 1As shown, the preform is drawn into an optical fiber through a graphite furnace. Before the optical fiber is coated with a coating, a fiber grating F-P cavity is written in the fiber core by a phase mask method. The fiber grating F-P cavity emits two laser pulses continuously by controlling the laser 109 . The laser pulse trigger time interval controls the fiber grating F-P cavity. The F-P cavity interval of the fiber grating is related to the rotation distance of the optical fiber through the active pulley. The laser pulse passes through the phase mask 108 to form interference fringes in the fiber core, thereby writing the grating. After the fiber grating F-P cavity is written, the fiber coating device 103 starts according to the distance the fiber passes through the driving pulley. According to the start-up time of the optical fiber coating device, the coating length and thickness of the special coating m...

Embodiment 2

[0043] In this embodiment, the light source, circulator, fiber grating F-P cavity sensor array, and demodulator in the device for quasi-distributed multi-parameter measurement of the fiber grating F-P cavity array are connected in sequence, and the light emitted from the light source is incident on the fiber grating through the circulator In the F-P cavity sensor array, it is reflected back to the circulator, and finally enters the demodulator; two fiber gratings form a Fabry-Perot interferometer, and the surface of the grating is coated with different coating materials. Make the sensor form F-P cavity interference peak and grating reflection peak under the action to be measured. Under the change of external parameters, different regions of the fiber grating F-P cavity have different resonance peaks. According to the movement of the resonant peak wavelength, the change of the external environment parameter is measured.

[0044] Such as Figure 4 As shown, the surface of the ...

Embodiment 3

[0050] A method for quasi-distributed multi-parameter measurement of a fiber grating F-P cavity array is provided, which is characterized in that the method includes the following steps, step 1, coating different coating materials on the surface of the grating; The fiber grating F-P cavity sensor array and the demodulator are connected in sequence, and the light emitted from the broadband light source enters the fiber grating F-P cavity sensor array through the circulator, and then reflects back to the circulator; step 3, finally enters the demodulator; using two A fiber grating constitutes a Fabry-Perot interferometer (Fabry-Perot interferometer). The fiber grating F-P cavity sensor forms an F-P cavity interference peak and a grating reflection peak under the action of the parameters to be measured. When the parameters to be measured change, according to the resonant peak wavelength Change the difference of the value, combine with the sensitivity matrix equation, and measure a...

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 method and device for quasi-distributed multi-parameter measurement of a fiber bragg grating F-P cavity array. The fiber bragg grating F-P cavity array with a fixed-point coating is connected with a fiber bragg grating F-P cavity array demodulator through a single-mode optical fiber. The surface of a fiber bragg grating F-P cavity has a variety of different coating materials. The fiber bragg grating F-P cavity demodulator demodulates to obtain the shape and position of a fiber bragg grating F-P cavity reflection spectrum. When an external environment changes, the different coating materials of the surface of the fiber bragg grating F-P cavity have different changes in the extension and contraction size and refractive index. The changes of a coating drive the change of the optical fiber, so that an interference peak of the fiber bragg grating F-P cavity is changed. Through the interference peak interval, wavelength movement and other information, and combined with a sensitivity matrix equation, the change of external parameters is obtained by demodulation. By using a drawing tower to write the fiber bragg grating F-P cavity online, the fiber bragg grating F-P cavity writing efficiency can be greatly improved, the sensor intensity can be improved, and the sensor array of quasi-distributed multi-parameter measurement can be formed.

Description

technical field [0001] The invention belongs to the technical field of fiber grating sensing, and in particular relates to a quasi-distributed multi-parameter measurement method and device for a fiber grating F-P cavity array. Background technique [0002] With the development of the times, the requirements for fiber optic sensors continue to increase. At present, fiber optic sensors are developing in the direction of high performance, large capacity, multi-parameter and array. The development of a new generation of fiber optic sensor networks has become a major issue in the new wave of informationization. [0003] Fiber Bragg Grating is a new generation of optical passive devices, which has the advantages of good stability, small size, flexible use, and easy integration with optical fibers. It has opened up a new direction for the field of optical fiber sensing. At present, fiber optic sensors have been widely used in electric power, transportation, security and other fie...

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
IPC IPC(8): G01D5/26
Inventor 余海湖毕浩郭会勇范典唐健冠罗斯特姜德生
Owner WUHAN UNIV OF TECH
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