Evaluation Method of Railway Subgrade Condition Based on Periodic Detection of Ground Penetrating Radar
A technology of ground penetrating radar and railway subgrade, which is applied in measurement devices, radio wave measurement systems, reflection/re-radiation of radio waves, etc., can solve the problems of inability to realize dynamic detection and evaluation of railway subgrade status, and shorten the required time. , efficiency improvement, good accuracy and efficiency
Active Publication Date: 2020-07-03
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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[0004] The technical problem to be solved by the present invention is to provide a railway roadbed state evaluation method based on the periodic detection of ground penetrating radar in view of the shortcomings that the existing roadbed detection technology cannot realize the dynamic detection and evaluation of the state of the railway roadbed
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Embodiment 1
[0047] Example 1: The detection road section is a certain railway line in northern my country. The thickness of the track bed in the hard rock subgrade section is 35cm; the thickness of the subgrade bed is 3m, and the surface layer is 0.7m, which is filled with graded crushed stone; the bottom layer is 2.3m, which is filled with improved soil build. The Italian IDS ground penetrating radar was used for both tests, and the 400MHz antenna was selected.
[0048] Select a radar image from each of the two detections, namely the historical image A and the current image B, see figure 2 and image 3 , the main change area is the sinking part. The mileage of both images is (K62+320, K63+420), but there is an offset in the depth direction. The images are all 1100×450 pixels in size. This embodiment uses the C# language to develop the image processing program, and some steps use the open source computer vision library OpenCVSharp, which is a .Net wrapper of OpenCV, and is developed u...
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The present invention relates to a railway roadbed state assessment method based on ground penetrating radar periodicity detection, belonging to the railway roadbed detection technology field. The implementation steps of the method comprise: image preprocessing; image registration; primary election of region of variation; difference image construction; selection of region of variation; roadbed anomaly identification; and roadbed state classification and suggestion. The railway roadbed state assessment method based on ground penetrating radar periodicity detection realizes the registration of the ground penetrating radar periodicity detection image through adoption of the ORB, FLAAN AND RANSAC algorithms, employs the feature point binary image to perform primary election of region of variation, constructs a difference image through the Wavelet Transform, and employs the OTSU to select the region of variation so as to comprehensively employs the historical detection information and the current detection information to perform identification and classification of the railway roadbed state. The railway roadbed state assessment method based on ground penetrating radar periodicity detection realizes the rapid and dynamic assessment of the railway roadbed state, improve the processing efficiency of the ground penetrating radar periodicity detection and help the railway engineering system to timely grasp the roadbed state and develop the maintenance work.
Description
technical field [0001] The invention belongs to the technical field of railway subgrade detection, and relates to a method for assessing the state of a railway subgrade based on periodic detection of ground penetrating radar. Background technique [0002] The subgrade is the foundation of the railway track, and as the substructure of the railway line, it plays a vital role in driving safety. Subgrade disease may not only cause uneven subsidence of the track, but also lead to serious poor state of the track surface, increase the workload of line maintenance, affect the normal operation of the train, and may even endanger the safety of the train in severe cases. How to grasp the health status of the subgrade in time, take necessary maintenance measures to alleviate diseases, and ensure driving safety while continuously increasing the axle load and improving transportation efficiency have become major issues to be solved urgently. [0003] As a fast, non-destructive and effici...
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IPC IPC(8): G06T7/00G06T7/33G01S13/88G01S13/89
CPCG01S13/885G01S13/89G06T7/0004G06T2207/10044G06T2207/20032G06T2207/30108
Inventor 杜翠张千里刘杰韩自力蔡德钩马伟斌陈锋程远水
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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