METHOD OF ROAD SURFACE CROSS CUT SMOOTHNESS (WHEEL TRACKING) DETERMINING Russian patent published in 2017 - IPC G01C3/20 

FIELD: construction.

SUBSTANCE: in accordance with the invention, a horizontal and vertical survey on a controlled section of a road is created using a mobile scanner survey, where the GPS base stations located along the roadsides 2-3 kilometers away from the road axis and not more than 300 meters, and hard points on the sides of the roadside in the form of the bases of the sign posts and road construction elements serve as horizontal and vertical survey control points. The dynamic mode of measuring the parameters of the road surface transverse profile is carried out by means of mobile laser scanning of the controlled area in the forward and backward directions, as a result of which the coordinates along the X, Y, Z axes of laser ray reflecting points from the roadway surface and the horizontal and vertical survey control points which are identified on the scans. The scan is received, the scan results are transmitted to the PC and the scanner is registered with the computer program, the actual digital vector three-dimensional model of the road surface is obtained. In the same program, the surface of the roadway is simulated in the given direction, using the design values of the corresponding geometric parameters, aligning it along the horizontal and vertical survey control points with the obtained actual digital vectorial three-dimensional model of the road surface and forming the track surface with a given discreteness. In the automatic mode, the discrepancies between the instrument parameters value of the runway paving surface cross direction profile are determined on the basis of the obtained spatial coordinates along the Z axis of the laser ray reflecting points of the actual digital vectorial three-dimensional model and the corresponding values of the design digital vector three-dimensional model of the coating surface of the road controlled section. Comparing the obtained data with the relevant requirements of regulatory documents, the transverse flatness of the road surface is determined.

EFFECT: increased accuracy of road surface wheel tracking determining.

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