Gravel geometric feature acquisition system and acquisition method

Abstract

The invention discloses a gravel geometric feature acquisition system and an acquisition method. A plane mirror assembly and a video camera are used for obtaining real gravel geometric features, and a gravel three-dimensional model is received according to the three-dimensional reconstruction technology, and the gravel geometric feature acquisition system and the acquisition method are used for obtaining the gravel geometric features and gradation characteristics. The main structure of the system comprises a retroreflector surface group, a video camera, and a computer. A picture is received by shooting at the gravels between the two mirrors and images reflected in the mirror, the images are inputted into the computer through a data line, the geometric features of rock fragments are gained through a three-dimensional reconstruction algorithm, and the three-dimensional model is established. The gravel geometric feature acquisition system and the acquisition method have the advantages that the geometrical features data of gravels are obtained, the granular real shape is restored, the shortcoming that a traditional screening test can only determine the minimum grain size is overcome. The gravel geometric feature acquisition system and the acquisition method are capable of meeting the accuracy requirements of the gravel granularity analysis, and of carrying out a plurality of stress deformation analysis by establishing a model combined with a discrete element software analysis technology.

Description

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

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems of laborious, time-consuming, high noise and dust pollution in the traditional crushed stone grading screening test, the present invention provides a crushed stone geometric feature collection system and collection method, which are used for five-view imaging of graded crushed stones, Cooperate with 3D reconstruction technology to restore particle shape, used to obtain 3D geometric characteristics and gradation characteristics of crushed stone particles, and combined with discrete element software to analyze the stress reorganization and long-term settlement analysis of subgrade graded crushed stone under traffic load

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