Power line crossover measurement method based on airborne laser radar data

Abstract

The invention discloses an overhead transmission line crossover measurement method based on airborne laser radar data. The method comprises the following steps of: designing the flying route, flying height and system parameters and performing data acquisition; processing the laser radar data to obtain a laser point cloud data classification map, an DEM (digital elevation model), a contour line, a DSM (digital surface model) and a DOM (digital digital orthoimage), and performing overhead transmission line optimization design; determining the crossover position of the overhead transmission line, and selecting a corresponding item from a ground feature base and marking; performing crossover height measurement by comprehensively utilizing the laser point cloud data, DEM, DSM and DOM; and marking the linear crossover of the crossing angle to be measured and the designed line with vector lines, and measuring the crossing angle. According to the invention, the height and position of the crossover power line and the crossing angle parameter of the line are obtained by use of the laser point cloud data and the high-resolution orthoimage, and the precision and efficiency of the line crossover measurement are improved.

Description

technical field [0001] The invention belongs to the field of crossover measurement of overhead power transmission lines, and in particular relates to a power line crossover measurement method based on laser radar data. Background technique [0002] When the overhead power transmission line project crosses with the power line, weak wire (referring to the communication line such as telephone line, cable TV, optical cable) and the above-ground and underground structures, cross-span measurement must be carried out. At present, the commonly used line crossing measurement generally adopts theodolite, total station, GPS-RTK positioning technology, laser range finder and other technologies, and these technologies are used to comprehensively apply suspension height measurement method, GPS combined with total station method, air rendezvous method, etc. The method is to measure the elevation and cross angle of crossing points. On this basis, the line selection personnel design the hei...

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problems of low efficiency, poor environmental adaptability, poor real-time performance and limited field of view existing in the above-mentioned crossover measurement of overhead transmission lines, and proposes an airborne Power line cross-span measurement method of lidar data to realize cross-span measurement including overhead transmission lines, communication lines, roads and railways, rivers, houses, etc.

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