Method for processing railway roadbed detected radar data with sleeper interference eliminated

A technology of railway subgrade and radar data, which is applied in the direction of railway vehicle shape measuring instrument, railway car body parts, railway auxiliary equipment, etc. Scope and other issues, to achieve the effect of simple and efficient system, safe and convenient operation, reducing complexity and processing cost

Inactive Publication Date: 2009-12-02
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

There are several methods for vehicle-mounted railway subgrade ground-penetrating radar to eliminate sleeper interference abroad: (1) The radar system does not make special treatment for sleeper interference. This type of vehicle-mounted radar is suitable for detecting wooden sleepers on railway subgrades, and most of the currently used sleepers are steel bars. Concrete, so its use has certain limitations
(2) Extend the bracket arm where the radar antenna is installed to outside the range of the sleeper, and detect outside the range of the sleeper. Obviously, this method is less affected by the interference of the sleeper. The main prob

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  • Method for processing railway roadbed detected radar data with sleeper interference eliminated
  • Method for processing railway roadbed detected radar data with sleeper interference eliminated
  • Method for processing railway roadbed detected radar data with sleeper interference eliminated

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Embodiment Construction

[0020] see figure 1 , figure 1 It is a flowchart of the present invention. The steps of radar data processing for railway subgrade detection without sleeper interference are as follows:

[0021] Firstly, the vehicle-mounted subgrade radar continuously samples on the detection vehicle running at approximately constant speed to obtain the raw data of the subgrade detection, which not only includes useful signals that can reflect the condition of the railway subgrade and various noises caused by other electromagnetic interference sources, but also includes Sleeper interference signal. The screened antenna used in the ground-penetrating radar antenna of the railway subgrade, the receiving antenna first receives the direct wave, and the medium between the transmitting and receiving surface of the antenna and the upper interface of the sleeper is only air with uniform electromagnetic characteristics, no reflecting interface, and no reflected signal. When the antenna position is n...

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Abstract

The invention discloses a method for processing railway subgrade detecting radar data with sleeper interference eliminated, which comprises the following steps: finding out a position of a sleeper reflecting surface event of a railway subgrade detecting radar original data and extracting a sleeper reflected signal; performing low-pass filtering on the reflected signal to obtain a logic rule representing a sleeper position; and selecting the subgrade detecting original data by taking the logic rule as a reference, and obtaining the railway subgrade detecting radar data with the sleeper interference eliminated. The method extracts the relevant information of a sleeper according to a sleeper interference signal and eliminates the sleeper interference signal so as to facilitate the further processing of the railway subgrade detecting radar data. The method has the characteristics of safety, high efficiency and strong applicability.

Description

technical field [0001] The invention relates to a method for processing radar data of railway embankment detection for eliminating sleeper interference. Background technique [0002] Conventional diseases of railway subgrades include bed slopping, ballast sinking grooves, subsidence and extrusion, concealed hollowing, and sinkholes. In addition, plateau railways and railway subgrades in high latitude areas also have frozen soil diseases, etc. All of these will The deformation of the railway subgrade caused by it will affect the safety of transportation and the speed of trains. Therefore, timely and accurate detection of roadbed diseases and taking corresponding control measures are important guarantees for the safe operation of railways. The traditional method of artificially detecting railway subgrade diseases can no longer meet the needs of railway development. At present, vehicle-mounted geological mines are widely used to detect railway subgrade diseases abroad, and goo...

Claims

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Application Information

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IPC IPC(8): B61K9/08
Inventor 肖建平柳建新
Owner CENT SOUTH UNIV
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