METHOD FOR DETERMINING PARAMETERS OF ROAD GEOMETRIC ELEMENTS AND ROADSIDE CHARACTERISTICS Russian patent published in 2017 - IPC G01C3/02 

FIELD: physics.

SUBSTANCE: horizontal and vertical survey (HVS) of the controlled road area, is performed in the claimed method by terrestrial or mobile scanner surveying in the forward and backward direction, where the base stations GPS are the HVS reference points, placed on the road curb side, as well as the solid points on the curb sides of the roadway in the form of the traffic sign pole bases and the road arrangement elements. The terrestrial or mobile laser scanning of the controlled area is performed on the HVS reference points, resulting in determining the spatial coordinates of axes X, Y, Z of the laser beam reflection points from the roadway surface and the HVS reference points, that are identified in the scans. The scan is received, the scan results are transmitted to the PC, and the scans are registered therein by using the computer program, the actual digital dot three-dimensional (3D) model of the road and the roadside is received, then the route photographing of the controlled section of the roadway and the adjacent territory is performed to the width of 200 metres of the road axis in the forward and backward direction on the basis of the unmanned aircraft. The photographing results are transmitted to the PC, the orthophotos are registered therein by using the computer program and the digital photogrammetric model construction of the road surface and the adjacent territory is made. Its spatial data are transformed according to the HVS reference points into the data of the actual digital vector three-dimensional (3D) model, and the integrated realistic digital vector three-dimensional (3D) model of the controlled raod section and the roadside is received, the standard three-dimensional model of the road and the roadside is modelled in the same program. It is aligned according to the same HVS reference points with the received integral realistic digital vector three-dimensional (3D) model of the road and the roadside. Then the longitudinal sections are formed with the given increments, the differences are automatically recognized between the actual values of the controlled geometric element parameters of the integral realistic digital vector three-dimensional (3D) model and the values of the standard three-dimensional model of the controlled road and roadside section, comparing the received data, the linear geometric parameters of the road and the roadside are determined on the surface of the measured layer required for the construction or reconstruction of roads.

EFFECT: defining the reliable and accurate parameter values of the geometric road elements and the roadside characteristics by using the laser scanning technology.

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