A rapid extraction method for the height of tree obstacles in power grid transmission lines

A technology of transmission lines and extraction methods, which is applied in the field of remote sensing image power grid security applications, can solve the problems that cannot meet the safety monitoring of high-voltage transmission lines, and the accuracy of tree height measurement cannot be guaranteed, so as to make up for manual inspections and UAV inspections. Check and improve the effect of application ability
CN113989670BActive Publication Date: 2022-07-12北京四象爱数科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
北京四象爱数科技有限公司
Publication Date
2022-07-12

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Abstract

The invention discloses a method for quickly extracting the height of tree obstacles in power grid transmission lines, which adopts sub-meter high-resolution optical stereo image and RPC files, combined with high-precision control points collected on the ground, and extracts high-precision surface DSM and points through processing. Cloud data; on this basis, the filter classification technology is used to classify the point cloud data, and the ground points in the classification result are corrected by integrating the features of the ground objects in the satellite image, and the DEM is generated by interpolation; finally, the spatial difference based on DSM and DEM is established. The model's tree canopy height extraction method is used to verify the accuracy of the method through field collection points. The invention solves the problem that the height extraction precision is out of control due to DEM in the original spatial difference calculation model.
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Description

technical field

[0001] The invention belongs to the field of remote sensing image power grid security application, and in particular relates to a method for quickly extracting the height of tree obstacles in high-voltage transmission lines. Background technique

[0002] High-voltage transmission lines directly use air as an insulator. Usually, the height design of transmission lines follows national standards. However, due to tree growth or extreme weather, trees will contact or be close to power lines, and trees are prone to conduct electricity or line tripping, jeopardizing the safe operation of power lines. This can lead to power outages, fires in severe cases, and heavy economic losses. According to the operation regulations of overhead transmission lines in my country, when the lines of 220KV and above require the maximum sag, the safety distance between the conductors and the trees should be no less than 4.5 meters. In order to prevent the occurrence of safety acciden...

Claims

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