Real-time detection method for detecting mixture paving uniformity on bituminous pavement

Abstract

The invention provides a real-time detection method for detecting the mixture paving uniformity on a bituminous pavement. According to the method, the color digital image of a paving pavement is shot in real time during the paving process of a bituminous mixture paving machine at a preset acquisition height, a preset light source luminance and a preset illumination angle; subjecting the obtained color digital image to ashing, filtering, histogram equalizing, image binaryzation and morphological processing by adopting the MATLAB software; obtaining the static distance difference alpha 0 of aggregates of each particle size range in the bituminous mixture relative to the X-axis and the Y-axis, the sum alpha 1 of all static distance differences in each secondary area relative to the original center of the image, and the sum alpha 2 of all static distance differences in each secondary area themselves, and adopting alpha 0, alpha 1 and alpha 2 as indexes for evaluating the mixture paving uniformity on the bituminous pavement. According to the technical scheme of the invention, the paving uniformity of the bituminous mixture during the paving process can be simply, quickly and quantitatively tracked, detected and analyzed in real time based on the digital image processing technology. Meanwhile, the system software is accurate in operation, fast in analyzing speed, reliable in data and convenient in operation.

Description

field of invention [0001] The invention relates to a detection technology for the paving uniformity of asphalt pavement, in particular to a real-time detection method for paving uniformity of asphalt pavement mixture. Background technique [0002] During the paving process of hot mix asphalt mixture pavement, due to various reasons, there may be deviation of asphalt content or / and uneven distribution of coarse and fine aggregates, which is the so-called segregation phenomenon. Asphalt mixture segregation will cause the mixture gradation and asphalt content of the actual pavement to seriously deviate from the design value, resulting in uneven overall quality of asphalt pavement. [0003] At present, there are three main methods for detecting the paving uniformity of asphalt pavement mixture: visual recognition, sand test and nuclear density meter. The subjectivity of visual recognition is too strong, and there is no unified standard; the principle of sand spreading test is s...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems existing in the detection method of the paving uniformity of asphalt pavement mixture, such as lack of unified standards, extremely time-consuming and relatively large degree of dispersion of detection results, the present invention proposes a real-time detection method for paving uniformity of asphalt pavement mixture. Detection method

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