Visual acquisition system and method for geometrical characteristics of graded crushed rocks of railway and road beds

Abstract

The invention discloses a visual acquisition system and a visual acquisition method for geometrical characteristics of graded crushed rocks of railway and road beds. The system consists of a test stand and test cameras. The test stand consists of adjustable bottom plates, side plates and camera bracket kits. The cameras are arranged on brackets consisting of camera support rods and fine adjustment knob lifting frames, and are used for acquiring images of crushed rocks to be tested. The front surfaces, the upper surfaces and the lateral surfaces of the crushed rocks are imaged to form three views of the crushed rocks, the three views are input into a computer through a data line by a high-speed image acquisition card, and a true three-dimensional model of particles is recovered by a three-dimensional reconstruction technology. The system and the method can be used for quickly and accurately acquiring the geometrical characteristics and grading characteristics of the graded crushed rocks which are widely used for railways and roads; and in addition, the crushed rock particle model acquired by the system can be directly combined with discrete element software to analyze the forced movement of the graded crushed rocks of the railway and road beds under the load action of trains as well as the long-term settlement of the graded crushed rocks.

Description

technical field [0001] The invention relates to a geometric feature visualization acquisition system and acquisition method, in particular to a railway road subgrade graded crushed stone geometric feature visualization acquisition system and method. Background technique [0002] With the rapid development of my country's high-speed railway construction, it is very important to improve the quality of subgrade construction and adapt to the leapfrog development of railways. The emergence of passenger dedicated lines poses new challenges to the design, construction and maintenance of traditional railways. Railway subgrade is an important part of railway engineering. As a geotechnical structure, it is mainly composed of the surface layer of the subgrade, the bottom layer of the subgrade and the embankment below the subgrade. The settlement of the subgrade is mainly caused by the superposition of the settlement of these parts. As the direct basis of the track structure, the graded...

AI Technical Summary

Problems solved by technology

In the analysis of the railway embankment, the discreteness of the gravel and its own geometric shape characteristics cannot be considered, so the analysis results are quite different from the actual test data.

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