Multi-passband filtering method of railroad bed disease detection ground penetrating radar signals

A technology of ground penetrating radar and railway roadbed, which is applied in the field of exploration geophysical data processing, can solve the problem of low signal-to-noise ratio of radar signals, and achieve the effect of improving signal-to-noise ratio and facilitating identification

Active Publication Date: 2017-01-04
HUNAN ZHONGDA CONSTR ENG TESTING TECH
View PDF3 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to propose a ground penetrating radar signal for railway roadbed disease detection in view of the problem that the radar signal of railway roadbed disease detection is annihilated by the strong reflection interfer

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
  • Multi-passband filtering method of railroad bed disease detection ground penetrating radar signals
  • Multi-passband filtering method of railroad bed disease detection ground penetrating radar signals
  • Multi-passband filtering method of railroad bed disease detection ground penetrating radar signals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] see Figure 2 to Figure 6 , this example uses the actual measurement data of the dedicated vehicle-mounted ground-penetrating radar for Qinghai-Tibet Railway subgrade detection, and its antenna center frequency is 200MHz. The inspection vehicle runs at a constant speed of about 15 km / h. The antenna is fixed at the bottom of the inspection vehicle, 0.4 meters away from the upper surface of the sleeper. The transceiver antenna is arranged along the axial direction of the sleeper, perpendicular to the direction of the rail. The average horizontal sampling density is 15.38 channels / m.

[0047] After obtaining the measured data in the field, select one of them for processing (such as figure 2 shown). figure 2 The scanning channel number in the horizontal direction is 24120 to 24760, a total of 641 channels; the time window is 90ns, and the number of sampling points is 512 points. from figure 2 From the radar image in , it can be seen that the radar image is distributed i...

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 multi-passband filtering method of railroad bed disease detection ground penetrating radar signals. The filtering method comprises steps of automatically acquiring roadbed original radar data through a vehicle-mounted roadbed detection radar; extracting radar reflection signals at joints of all scanning channel sleepers so as to form a digital sequence, and obtaining frequency spectrum features of the sleepers and the rail strong reflection interference signals by carrying out frequency spectrum analysis on the digital sequence; designing a multi-passband filter used for inhibiting strong interference of the sleepers and the rails; and using the filter to successively filter the radar signals according to sampling points so as to remove interference signal. According to the invention, by analyzing the strong reflection interference signals of the rails and the sleepers in the railroad bed disease detection ground penetrating radar signals for the first time, sleeper identification device is not required, radar signal acquisition is carried out without avoiding the rails, and the multi-passband filter designed on the basis of strong interference frequency spectrum features of the rails and the sleepers is used for removing strong reflection interference of the sleepers and the rails, the signal to noise ratio of reflection radar signals of the roadbed medium is improved.

Description

technical field [0001] The invention belongs to the field of exploration geophysics data processing, in particular to a multi-passband filtering method for detecting ground-penetrating radar signals of railway embankment diseases. Background technique [0002] The railway is the main artery of the national economy and an important support for economic construction and social development. Railway embankment disease is one of the important factors that threaten the safe operation of railways. With the increase of traffic mileage and service life, traditional roadbed disease detection methods (such as equidistant digging method, light dynamic penetrating method, Rayleigh wave surface wave method, nuclear density instrument method, high-density resistivity method, etc.) have the common characteristics of low efficiency, or damage to existing lines, and cannot provide detailed information on long-distance lines. Ground-penetrating radar technology is a high-resolution, high-effi...

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): G01S13/88G01S7/36
CPCG01S7/36G01S13/885
Inventor 肖建平王韵棋柳建新吴旭东郑冕
Owner HUNAN ZHONGDA CONSTR ENG TESTING TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap