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

Interference type optical fiber perimeter vibration intrusion recognition algorithm

An optical fiber perimeter, identification algorithm technology, applied in the direction of alarms that rely on interference with short-wavelength radiation, can solve the problems of signal identification, difficult to accurately identify human intrusion, etc., to achieve the effect of increasing accuracy

Active Publication Date: 2014-03-05
WEIHAI BEIYANG ELECTRIC GRP CO LTD BEIJING BRANCH
View PDF2 Cites 34 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no matter what kind of implementation principle is adopted, there will always be a problem of signal recognition, especially in the harsh environment and many interference conditions, it is difficult to accurately identify human intrusion

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
  • Interference type optical fiber perimeter vibration intrusion recognition algorithm
  • Interference type optical fiber perimeter vibration intrusion recognition algorithm
  • Interference type optical fiber perimeter vibration intrusion recognition algorithm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0046]The present invention is a technical scheme of multi-eigenvalue analysis based on classical mode decomposition (EMD). It is decomposed into several intrinsic mode functions (IMF) from high frequency to low frequency, so as to obtain the instantaneous frequency parameters with physical meaning. The EMD algorithm is very sensitive to the suddenness of the signal, and can retain its suddenness after decomposition; Multiple coupled signals of different frequencies are separated to achieve decoupling between signals, which is conducive to further analysis and processing of signals, and avoids redundant problems such as false frequencies and redundant signal components; compared with simple monotone functions, an IMF Representing a simple vibration mode, the definition of IMF has two conditions: (1) the number of zero-crossing points and the number of extreme points in its data are equal or differ by at most one; (2) its local maximum and minimum The mean values ​​of the upper...

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 the technical field of optical fiber vibration sensing and in particular relates to an interference type optical fiber perimeter vibration intrusion recognition algorithm suitable for security perimeter. The interference type optical fiber perimeter vibration intrusion recognition algorithm is characterized by comprising the following operations: reading data acquired by an optical fiber vibration sensor from a data acquisition end, and normalizing the acquired data; performing empirical mode decomposition; calculating a characteristic value of an empirical mode decomposition result; detecting multiple characteristic values, judging whether intrusion exists, if so, alarming, otherwise repeating the steps 1-5 for performing recognition in the next round. Compared with the prior art, the interference type optical fiber perimeter vibration intrusion recognition algorithm has the advantages that an original signal is subjected to empirical mode decomposition, the judgment accuracy is improved, the possibility that false alarm is caused due to a certain occasional specific characteristic can be eliminated by adopting a multi-characteristic value threshold detection mode, and intrusion alarm can be accurately realized under the condition that interferences of wind, rain, vehicles and the like exist.

Description

technical field [0001] The invention relates to the technical field of optical fiber vibration sensing, in particular to an interference type optical fiber perimeter vibration intrusion recognition algorithm especially suitable for an interference type optical fiber perimeter security system for security perimeters. Background technique [0002] With the development of social economy and science and technology, people's awareness of security has gradually increased, especially for oil depots, national defense, various chemical plants, fuel depots, nuclear power plants, docks and other important areas related to national security, followed by security monitoring The facilities are endless. Compared with the traditional security monitoring methods, such as manual monitoring, infrared radiation, electronic fence and many other security intrusion systems, the interference fiber optic perimeter security system has the advantages of high temperature and high pressure resistance, a...

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): G08B13/18
Inventor 乔秋晓王建强梁明明张凯
Owner WEIHAI BEIYANG ELECTRIC GRP CO LTD BEIJING BRANCH
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