드론의 선로변 전자기파 내성 시험장치 구축

초록

During train operation, an electric field is generated by the voltage of the catenary, and a magnetic field is generated by the current flowing in the catenary and the rail. The electromagnetic field is an interference source to the geomagnetic sensor measurements mounted on the drone, and has a significant effect on the navigation system. Therefore, for the safe flight of drones that inspect railway facilities at the trackside, it is necessary to test the effect of the electromagnetic field to verify the electromagnetic wave immunity performance. However, in Korea, there is still no device that can test the effect of electromagnetic waves of the same strength as that of a train while flying a drone. Due to the absence of such a test device, it is difficult to develop and introduce a drone to inspect facilities close to the track. In this study, to test the effect of electromagnetic waves on drones, a catenary test device was designed using a high voltage and high current generator. For safety reasons, the magnetic field generated by the return current flowing along the rail is difficult to implement in the test equipment. In the test device, the return current flows at the height of the catenary to ensure safety, and the position and direction of the return current are designed so that the same type of magnetic field is generated at the trackside and in the test device. The electromagnetic field measured in the test device is compared with simulation results and it is shown that the strength and shape are equivalent to that of the trackside. As a result, the test device can be used for development and certification of drones for inspection of facilities at the trackside.

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