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

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...

AI Technical Summary

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 problem of this method is that the radar antenna deviates from the center line of the railway. It is far away, and its effective width may exceed the safe operation range of the inspection vehicle, especially the use on double-track high-speed railways has certain limitations. Secondly, this method cannot detect diseases on the center line of the railway.

Compared with the above three railway subgrade detection radar schemes, the SRS radar system can effectively eliminate sleeper interference without affecting the safe operation of the railway, but it must have a special sleeper identification device, and the system is relatively complicated

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