Method for assessing road surface three-dimensional structure

A three-dimensional structure, road surface technology, applied in measuring devices, instruments, material analysis by optical means, etc., can solve problems such as large errors and low precision

Inactive Publication Date: 2012-10-24
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to overcome the defects of one-sidedness, low precision and large error

Method used

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  • Method for assessing road surface three-dimensional structure
  • Method for assessing road surface three-dimensional structure
  • Method for assessing road surface three-dimensional structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The present embodiment is carried out in the computer Intel (R) Core2 T7200 2.0GHz 2G DDR2 running environment of 64-bit Windows 7 operating system, adopts MATLAB R2010a software to realize, take SMA-16 road surface as example, specifically realize by the following steps:

[0052] Step 1: Reconstruct the three-dimensional structure of the road surface, and obtain the three-dimensional structure image and three-dimensional coordinate values ​​on the XYZ coordinates, accurate to 0.0001mm; see figure 1 and figure 2 ,specifically is:

[0053] Step 1.1: Adjust the camera and light source, and use the camera to obtain a two-dimensional image of each of the red, green, and blue light sources on the test road surface; The height of the unit and the light source is 1m from the road surface; adjust the irradiation angle and brightness of the red, blue, and green light sources so that the irradiation areas are completely overlapped, and the synthetic light is white; adjust the r...

Embodiment 2

[0084] In step 2, the square grid is divided into a size of 0.001 mm*0.001 mm, and other steps in this step are the same as in embodiment 1.

[0085] Other steps are the same as in Example 1.

Embodiment 3

[0087] In step 2, the size of the square grid is divided into 1 mm*1 mm, and other steps in this step are the same as in embodiment 1.

[0088] Other steps are the same as in Example 1.

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Abstract

The invention discloses a method for assessing a road surface three-dimensional structure, wherein three-dimensional coordinate values are obtained through reconstructing the road surface three-dimensional structure, according to the correlation of the three-dimensional coordinate values, a road surface macroscopic structure is quantitatively analyzed, and is assessed on the basis of the geometrical comprehensive assessment index, i.e. the antiskid index SI, so basis is provided for further analyzing the road surface functions. The method is convenient to operate, is mostly carried out by depending on a computer, no operation of the professional staff is needed, the personal error is small, the assessment index has very strong universality, the method is not influenced by the coordinate direction, the road surface macroscopic structure can be accurately and stably reflected, the result is round to the ten thousandth decimal, the assessment precision is higher, the five components have different sensitivities to the geometric characteristic variation of the road surface, so the comprehensive integral description can be provided, accordingly, the macroscopic structure condition of the road surface is really reflected, and the whole assessment system is comprehensive and complete.

Description

technical field [0001] The invention relates to an engineering detection method, in particular to a method for evaluating the three-dimensional structure of asphalt pavement combined with geometry. Background technique [0002] The macroscopic structure of asphalt pavement refers to the structure with a wavelength in the horizontal direction of the pavement in the range of 0.5-50mm, which characterizes the level of unevenness of the pavement, which is composed of the gaps between the exposed aggregates on the pavement surface, and is affected by the shape of coarse aggregate particles, particle size, Spacing, abrasion resistance, asphalt dosage and gradation design have a greater influence. [0003] The influence of macroscopic structure on the quality of pavement is multifaceted, because it is beneficial to the improvement of anti-skid performance and visual performance, and has a greater contribution to safety. The macroscopic structure can cause tire rubber deformation a...

Claims

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Application Information

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IPC IPC(8): G01B11/30G01B11/22G01N21/00
Inventor 韩森徐鸥明刘亚敏刘延强赵晶邵鹏康彭鑫高妮妮
Owner CHANGAN UNIV
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