A system and method for measuring the image distance of a power transmission line by an unmanned aerial vehicle

Abstract

The invention discloses a system and a method for measuring the image distance of a power transmission line by an unmanned aerial vehicle, wherein the system includes an unmanned aerial vehicle, a master console and a plurality of cameras. Image data, UAV includes airframe, laser radar device, rotor assembly, power device, flight control processor, state detection device and wireless communication module, laser radar device is used to collect 3D point cloud data of power transmission lines, and the main To receive two-dimensional image data and three-dimensional point cloud data, establish the mapping relationship between two-dimensional image data and three-dimensional point cloud data; identify the target object according to the two-dimensional image data, determine the three-dimensional point coordinates of the target object according to the mapping relationship, and The distance between the target and the transmission line can be calculated by the three-dimensional point coordinates of the target object; the distance of the target object in the entire transmission line corridor can be monitored through the camera, and all-weather and all-day transmission line monitoring can be realized.

Description

technical field [0001] The present application relates to the technical field of unmanned aerial vehicles, in particular to a system and method for unmanned aerial vehicles to measure the image distance of power transmission lines. Background technique [0002] The traditional method of measuring the distance of the transmission line is to use artificial ground laser ranging. The inspector uses a hand-held laser range finder to measure the distance between the target and the transmission line. The basic principle of this method is to use the flight of light Time, the distance is calculated from the speed of light and the atmospheric refraction coefficient. With the development of lidar technology, the currently commonly used transmission line measurement tool is the laser scanner, which can realize the three-dimensional restoration of a large-scale transmission line corridor scene, and can realize the distance measurement between any observation targets within the scanning r...

AI Technical Summary

Problems solved by technology

[0003] The measurement method of the traditional handheld laser rangefinder is susceptible to interference and influence of human and environmental factors

For example, in areas with many sunny days, the infrared rays contained in the strong sunlight will cause large measurement errors in the handheld laser rangefinder used outdoors; in rainy and snowy weather conditions, rain will also affect the reflection of the laser beam, resulting in The measuring equipment cannot work normally; at the same time, the inaccurate target positioning caused by humans will also bring errors to the measurement

The transmission line measurement method based on the laser scanner has high precision and is less affected by human factors, but it is also affected by rain and snow, and the operation cost of this method is high and the amount of data is large

For the above two measurement methods, there is still the same deficiency, that is, due to manpower and actual field operation costs, it is impossible to implement all-weather and all-day transmission line monitoring. When the actual operation scene is consistent with the original data acquisition scene When the original data obtained by the above two methods has a certain reference value and validity, but when there is a difference between the actual measurement scene and the scene at the time of data collection, for example, a new target object appears in the scene, it is difficult to achieve based on the original data. Distance measurement between new objects and transmission lines

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