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

Noise identification method in power line carrier communication fault detection system

A carrier communication and fault detection technology, which is applied in the distribution line transmission system, wired transmission system, transmission system, etc., can solve the problems of low identification accuracy, inability to accurately identify the carrier signal, cumbersome steps, etc., and achieve the suppression of radiation noise Effect

Active Publication Date: 2014-07-23
江苏益邦电力科技有限公司
View PDF3 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the existing noise identification methods have cumbersome steps and relatively low identification accuracy, and cannot accurately identify the carrier signal that causes the radiation noise to exceed the standard

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 identification method in power line carrier communication fault detection system
  • Noise identification method in power line carrier communication fault detection system
  • Noise identification method in power line carrier communication fault detection system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The present invention will be further described below in conjunction with the drawings.

[0035] Step 1: Place the device under test, oscilloscope, 4 magnetic field probes (the number of probes M depends on the number of source signals N, M≥N), and wire connections on the test bench in the 3m anechoic chamber. The 4 magnetic field probes of the device under test are measured. Group near-field time-domain signals and export them, such as figure 2 As shown; or generate 4 sets of near-field time-domain signals in Matlab, such as image 3 Shown

[0036] Step 2: Combine the above 4 sets of near-field time domain signals x i (t),i=1,2,3,4, form the column vector x(t)=[x 1 (t),x 2 (t),x 3 (t),x 4 (t)] T As an observation signal;

[0037] Step 3: Perform independent component analysis on the observation signal x(t):

[0038] First, perform whitening preprocessing on the observation signal x(t). Use the principal component analysis method to remove the correlation between the signal s...

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 noise identification method in a power line carrier communication fault detection system and belongs to the technical field of electromagnetic compatibility technologies. M sets of measured near field time domain signals of a detected device form an observation signal x(t) used for a matrix, the observation signal x(t) is subjected to independent component analysis, in other words, a separation matrix W is searched for, the y=Wx is made to have highest Gaussianity, after whitening processing is performed, the x(t) is substituted into a Newton iterative formula and separated into M independent near field time domain signals, and waveforms of the M independent near field time domain signals are compared with those of far field time domain signals of the detected device so that signals causing standard exceeding of radiation noise can be determined. The method is simple, efficient and systematized better, frequency points of standard exceeding radiation noise to detected products can be accurately recognized, and therefore a radiation source can be rectified and reformed in a targeted mode, and radiation noise of the radiation source is suppressed.

Description

Technical field [0001] The invention relates to a noise identification method in a communication fault detection system, in particular to a noise identification method in a power line carrier communication fault detection system, and belongs to the technical field of electromagnetic compatibility. technical background [0002] With the widespread use of high-speed digital chips, switching devices, and wireless communication modules, a large amount of electronic noise spreads in space in the form of electromagnetic fields, and the resulting electromagnetic compatibility problems are becoming more and more complicated, which seriously affects the normal operation of other equipment. Various domestic and foreign standards also clearly stipulate that various electronic equipment must pass the radiation noise standard test before being sold. In order to solve the problem of excessive noise in the detection of radiated noise of electronic equipment, the problem of radiated noise must b...

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): H04B17/00H04B3/54H04B3/462
Inventor 赵俊平夏欢王一凡舒国伟
Owner 江苏益邦电力科技有限公司
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