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

Wavelength analysis device based on grating sensor

A technology of analysis device and sensor array, applied in the field of wavelength analysis, can solve problems such as large error and difficult to achieve, and achieve the effects of improving detection accuracy, strong applicability and reducing cost

Active Publication Date: 2018-11-06
ZHEJIANG UNIV
View PDF16 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the change of system parameters and the unbalanced spatial distribution between different gratings, it is difficult to achieve accurate synchronization in actual work, and the frequency of the sampled reflected light wave can only be an approximate value, and the error is relatively large

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
  • Wavelength analysis device based on grating sensor
  • Wavelength analysis device based on grating sensor
  • Wavelength analysis device based on grating sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] In order to describe the present invention more specifically, the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] Such as figure 1 As shown, the wavelength analysis device based on the fiber grating sensor of the present invention includes: a laser 1, a modulator 2, a microwave frequency sweep source 3, a power divider 4, a circulator 5, a fiber grating sensor 6-1 to 6-3, a photoelectric detector 7, local oscillator 8, mixer 9-1 and 9-2, low-pass filter 10-1 and 10-2, analog-to-digital converter 11-1 and 11-2, DSP processor 12; where: laser 1 emits continuous wide-spectrum light, microwave sweeping source 3 emits radio frequency signals within a certain frequency range and divides them into two paths through a power divider 4, and one path is mixed with the radio frequency signal sent by the local oscillator 8 through a mixer 9-1 , and then filtered by the low...

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 wavelength analysis device based on a grating sensor, which comprises a laser, a modulator, a microwave sweep frequency source, a power splitter, a circulator, a fiber grating sensor, a photoelectric detector, a local oscillator, a mixer, a low pass filter, an analog-to-digital converter and a processor. The wavelength analysis device adopts the fiber grating sensor and the Mach Zehnder amplitude modulator, the structure becomes simpler and the cost is reduced; radio-over-fiber radio frequency signals are adopted as detection signals, optical path information is obtained through detecting the amplitude and the phase of the radio frequency signals, the detection precision of the system is improved, the anti-environment interference ability is strong, gratings withany distribution and any central wavelengths can be effectively detected, and the applicability of the system is stronger.

Description

technical field [0001] The invention belongs to the technical field of wavelength analysis, and in particular relates to a wavelength analysis device based on a grating sensor. Background technique [0002] Compared with traditional electrical sensors, fiber grating sensors have higher reliability, electromagnetic compatibility, anti-interference ability, corrosion resistance and other characteristics, and have been widely used in monitoring fields such as fire and structural health. Compared with traditional sensing technologies, FBG sensors can perform array monitoring through wavelength division multiplexing, that is, FBG sensors with different wavelengths are connected in series to form a wider coverage. [0003] The working principle of the fiber grating sensor is: with the change of physical quantities such as external temperature, stress or density, the wavelength reflected by the fiber grating sensor will shift, and the offset of the wavelength reflected by the fiber...

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): G01D5/30
CPCG01D5/30
Inventor 杜一杰金晓峰程志威章献民金向东池灏郑史烈余显斌
Owner ZHEJIANG UNIV