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

Noise reduction method for distributed optical fiber temperature measurement system based on bipartite svd

A distributed optical fiber and noise reduction technology, which is applied to pattern recognition in signals, thermometers, and heat measurement, etc., can solve problems such as long calculation time, complex implementation process of noise reduction algorithm, and difficulty in practical application, etc., to reduce noise level, Easy to achieve, smoothing effect

Active Publication Date: 2020-03-31
CHENGDU UNIVERSITY OF TECHNOLOGY
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the implementation process of the noise reduction algorithm currently applied to the distributed optical fiber temperature measurement system is complicated, the calculation time is long, and it is not easy for practical application

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
  • Noise reduction method for distributed optical fiber temperature measurement system based on bipartite svd
  • Noise reduction method for distributed optical fiber temperature measurement system based on bipartite svd
  • Noise reduction method for distributed optical fiber temperature measurement system based on bipartite svd

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Embodiment 1: see figure 1 and figure 2 , The optical fiber temperature measurement system includes: laser pulse light source, wavelength division multiplexer, sensing optical fiber, avalanche photodiode, amplifier, and data acquisition card. Its working principle is as follows: the laser pulse light source injects laser pulses into the sensing fiber, the laser pulse interacts with the sensing fiber medium to generate backward spontaneous Raman scattered light with temperature information, and the backward spontaneous Raman scattered light with temperature information The wavelength division multiplexer is divided into anti-Stokes light and Stokes light. The two optical signals are converted into anti-Stokes electrical signal and Stokes electrical signal through the avalanche photodiode respectively. After the two electrical signals are amplified by the amplifier, the data is collected The card gets anti-Stokes data and Stokes data.

[0058] A method for reducing noi...

Embodiment 2

[0082] Example 2: see Figure 1 to Figure 13 , it can be seen from the figure that the data we obtained includes anti-Stokes original data and Stokes original data. In steps (1)-(3), anti-Stokes original data and Stokes original data are processed in exactly the same way. Let's take the original anti-Stokes data obtained at an actual temperature of 45.2°C as an example:

[0083] The anti-Stokes original data is constructed into a 2╳(L-1) dimension Hankel matrix, and said L is the length of the original data;

[0084] Then decompose the singular value of the Hankel matrix into left singular matrix, singular value diagonal matrix and right singular matrix; keep the first singular value of the singular value diagonal matrix, and set the other singular values ​​to 0 to form a new singular value diagonal Matrix; reconstruct the left singular matrix, right singular matrix and new singular value diagonal matrix to form a new matrix, which is marked as the matrix after noise reductio...

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 for noise reduction in a distributed optical fiber temperature measurement system based on dichotomous SVD. First, two sets of original data are obtained to form two matrices, and the two sets of original data are anti-Stokes and Stokes original data; Singular value decomposition and reconstruction of two matrices are performed to form two denoised matrices; the denoised data are obtained from the denoised matrices respectively, and the two sets of data are fused to calculate the temperature measurement results, maximum deviation and root mean square error and smoothness, calculate the quality coefficient of the result; after multiple iterations of binary singular value decomposition, obtain the result quality coefficient of the demodulation result of the noise reduction signal after each iteration; find the optimal number of iterations, and reduce noisy data as the best signal. The noise reduction method provided by the invention effectively improves the signal-to-noise ratio of the original acquisition signal, reduces the maximum deviation and root mean square error of temperature measurement, and improves the smoothness of the temperature curve.

Description

technical field [0001] The invention relates to a method for reducing noise in a temperature measuring system, in particular to a method for reducing noise in a distributed optical fiber temperature measuring system based on binary SVD. Background technique [0002] With the rapid development of optical fiber sensing technology, due to its characteristics of anti-electromagnetic interference and distributed continuous measurement, distributed optical fiber temperature measurement system has been widely used in some specific and harsh environments such as power grids, mines, and nuclear environments. monitor. However, the random noise of the system increases the measurement error, which has always been an urgent problem to be solved in the distributed optical fiber temperature measurement system. In order to reduce the impact of random noise on the measurement results, the researchers improved the system hardware and used digital signal processing algorithms to improve the s...

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): G01K11/32G06K9/00G01K11/324
CPCG01K11/32G06F2218/04
Inventor 王洪辉王翔杨剑波成毅庹先国
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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