Method for determining texture characteristic length range based on friction coefficient
A friction coefficient and texture feature technology, which is applied in the field of road surface friction coefficient and pavement anti-skid performance detection, can solve problems such as the inability to meet the research needs of the actual pavement anti-skid performance and the low prediction accuracy.
Active Publication Date: 2019-11-22
WUHAN UNIV OF SCI & TECH
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However, the characteristic wavelength range determined by this method has low prediction accuracy when predicting the friction coefficient, which cannot meet the needs of actual road surface anti-skid performance research.
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[0029] The realization of the object of the present invention, function characteristic and advantage will be combined with embodiment, with reference to appended Figure 1-4 for further clarification. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0030] This example provides a method for determining the wavelength range of texture features based on friction coefficient, including the following steps:
[0031] Step S1: Test the surface texture profile of multiple different road sections, and take the average value of multiple surface texture profile measurements. The surface texture profile of 22 different road sections is measured on the spot with a road surface texture measurement system (such as the road texture test vehicle of the Swedish National Road and Transport Institute (VTI) and the ARAN multifunctional road test vehicle of Canadian Roadware Company), with a ...
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The invention provides a method for determining the texture characteristic length range based on a friction coefficient, which comprises the steps of firstly, setting different energy variations according to a certain step size, and calculating the construction level variation corresponding to the corresponding energy change ratio; then solving the correlation coefficient between the constructionlevel and the friction coefficient by taking the construction level variation at a certain wavelength as an independent variable and the friction coefficient as a dependent variable, successively increasing the step size, and taking different energy change ratios to get the corresponding correlation coefficient. The characteristic wavelength range of the texture can be determined by the energy change ratio or the construction level variation corresponding to the maximum value of the correlation coefficient. Therefore, the prediction is enabled to be high in accuracy and consistent with the actual situation of the road surface.
Description
technical field [0001] The invention belongs to the field of road engineering, and in particular relates to a detection technology for road surface friction coefficient and road surface antiskid performance. Background technique [0002] In the process of road surface detection, road surface roughness refers to the deviation of the road surface from the ideal plane, and it has numerical characteristics that affect vehicle dynamics, driving quality and road dynamic load. The ordinate of the road surface roughness curve is the longitudinal displacement change value of the road surface, and the abscissa represents the length of the road, which is a kind of time domain and is called length domain or space domain in application. [0003] According to the wavelength, the unevenness of the road surface can be divided into three types: long wave, short wave and rough texture. Among them, the long wave causes the low-frequency vibration of the vehicle, the short wave causes the high...
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IPC IPC(8): G01N19/02
CPCG01N19/02
Inventor 冉茂平杨艳梅周兴林肖神清邹兰林严园
Owner WUHAN UNIV OF SCI & TECH