Abstract
China completed the construction of more than 1.15 million kilometers of transmission lines with conventional voltage levels spanning its vast territory in 2014. This large and complicated power grid structure relies mainly on manual operation and maintenance of lines. Unmanned aerial vehicles (UAVs) equipped with high-definition digital video cameras and cameras and GPS positioning systems can conduct autonomous patrols along the grid. However, the presence of electromagnetic fields around high-voltage transmission lines can affect the UAV’s magnetometer, resulting in a wrong heading and thus unsafe flight. In this paper, the traditional method of UAV heading calculation using a magnetometer was analyzed, and a novel method for calculating UAV heading based on dual antennas was proposed. Experimental data showed that the proposed method improves the anti-magnetic interference characteristics of UAVs and increases UAV security and stability for power inspection applications.
Highlights
The increasing interest in the development of unmanned aerial vehicle (UAV) technology has heightened the demand for safe and efficient Unmanned aerial vehicles (UAVs) for power transmission line inspection.the presence of electromagnetic fields around high-voltage overhead transmission lines affects the sensors on UAVs, especially the magnetometer (LS303DMPU9250 InvenSense, Beijing, China)
When a UAV is carrying out power transmission line inspection, the external magnetic field of the transmission lines can affect the normal operation of the magnetometer, and this results in the incorrect calculation of the heading angle of the UAV and the phenomenon of turning or even exploding [8,9]
In order to solve the problem of electromagnetic interference with UAVs in complex magnetic field environments, we proposed a new UAV heading calculation method based on dual antennas
Summary
The increasing interest in the development of unmanned aerial vehicle (UAV) technology has heightened the demand for safe and efficient UAVs for power transmission line inspection. The presence of electromagnetic fields around high-voltage overhead transmission lines affects the sensors on UAVs, especially the magnetometer (LS303DMPU9250 InvenSense, Beijing, China). The entire electromagnetic spectrum will disrupt the magnetometer on UAVs. In China, the electromagnetic field from transmission lines is 50 Hz, resulting in errors in the heading-angles of UAVs, and affecting their flight [1,2]. As a consequence, existing power-patrol UAVs can only carry out long-distance photography, and it is difficult to achieve precise operation requirements with the UAVs. this paper proposes a UAV positioning and direction-finding system based on dual-antenna
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