New considerations and approaches to the detection of overhead cables by radar

[摘要] This thesis reports on research into the electromagnetic backscatter from overhead power cables as this method of distributing electrical power is hazardous to aircraft flying at low-altitudes especially during periods of low visibility. The work presented intends to improve current overhead cable detection techniques by using high-resolution millimetre-wave devices which will also allow compact devices that can be practical on a variety of airborne platforms such as manned aircraft, unmanned aerial vehicles and drones. The research also presents cable measurements obtained by airborne radar devices that operate at lower frequency bands, Ka-band and Ku-band, which were able to identify power line vulnerabilities due to a change in cable tautness along a power line. A modern, more efficient, overhead power cable type ACCC (Aluminium Conductor Composite Core) is also discussed and the effect of the less prominent surface structure of this cable type, relative to the most commonly used type of overhead power cable ACSR (Aluminium Conductor Steel Reinforced), on the backscattered radar signature is compared using both modelled and measured results for both cable types. The scattering model and measurements presented in this research are the first ever quantitative results reported for the ACCC type of cable.

[发布机构] University:University of Birmingham;Department:School of Engineering, Department of Electronic, Electrical and Systems Engineering

[关键词] T Technology;TK Electrical engineering. Electronics Nuclear engineering