High-voltage transmission line corridor three-dimensional reconstruction method based on Cesium three-dimensional earth framework

Abstract

The invention provides a high-voltage transmission line corridor three-dimensional reconstruction method based on a Cesium three-dimensional earth framework; the method comprises the steps: firstly obtaining a live-action three-dimensional model and a true shoot image of a high-voltage transmission line corridor region through employing an oblique photogrammetry technology, then building a Cesium three-dimensional earth scene, and completing the loading of the live-action three-dimensional model; based on a tower two-dimensional template image library and a corresponding three-dimensional model library, carrying out template matching on a TDOM to carry out recognition and rough positioning on a tower, and then loading a corresponding tower three-dimensional model in a Cesium three-dimensional earth scene and carrying out interactive correction; extracting parameter information of an insulator on a tower, loading and displaying the parameter information based on a Cetium frame, and completing three-dimensional drawing of a power line in the Cetium frame according to coordinates of same-name line hanging points of two end points of the insulator and in combination with an overhead line catenary equation; and finally, carrying out correction processing on the live-action three-dimensional model. The invention provides a high-voltage power tower line corridor three-dimensional reconstruction scheme with relatively high automation level and precision.

Description

technical field [0001] The invention relates to the technical field of three-dimensional reconstruction, in particular to a method for three-dimensional reconstruction of high-voltage transmission line corridors based on a Cesium three-dimensional earth frame. Background technique [0002] The 3D reconstruction of high-voltage power line corridor can provide important information for line inspection and provide important data support for smart grid construction. At present, the three-dimensional reconstruction methods of power line corridors mainly include two technical means: on-board Lidar (Lidar) and photogrammetry. Lidar is a surveying and mapping device that can obtain 3D information on the ground efficiently and with high precision through high-frequency laser ranging. However, it has not been widely used in 3D reconstruction of transmission lines due to limited equipment prices and high flight costs. Applications. In recent years, there have been lidar products moun...

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Problems solved by technology

[0004] However, the reconstruction accuracy of the above method is low, and it is usually difficult to carry out accurate and effective 3D reconstruction for slender structural objects such as high-voltage power tower lines widely distributed on the ground surface.

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