Key Techniques Of New Low Altitude Air Aerial Proton Magnetometer Based On UAV

Abstract:The combination of a proton magnetometer altitude unmanned helicopter magnetic survey is a new way of magnetic survey. This method can reduce both ground magnetic survey and topographic correction brought stray interference on the ground, but also capable of large-scale operations.Huangdan of Central South University has developed a low altitude proton magnetometer system based on small unmanned helicopter. At the system, the operating frequency range is600Hz-1500Hz. However, the system also has its shortcomings, the paper improved the expanded measurement frequency range, embedded GPS module, and tested the whole entire system.Firstly, the paper introduces the research status of the proton magnetometer and research status of small unmanned helicopter based proton magnetometer, and analyzes the significance of improving the system. Secondly, starting from UAVPM system, elaborated the measurement system around the main chip and signal acquisition circuit, then explained the characteristics and key technology issues. Thirdly, discusses the tuning circuit design and GPS positioning measurement system design, on the one hand is discussed how to expand the range of frequency measurement systems around the tuning circuit design principles and expanded, on the other hand is selected from the GPS module, the hardware interface design and programming control, then combining simulated flight test, verify the relationship between flight speed and positioning accuracy; Finally, the system is tested as a whole around the polarization pulse, off delay, delay frequency measurement and frequency measurement time. At last, the paper concludes the whole work, and gives the recommendations for inprovements.