Testing Of UAV Aeromagnetic System And Calibration Of Fluxgate Sensor

Aeromagnetic exploration is one of the most widely used geophysical methods with high detection characteristics such as economical,high efficiency and high precision and so on.It can do exploration work in the limited area where people is not available to get in.Besides its exploration area is extensive,method of aeromagnetic exploration has been used in the survey like oil and gas,the exploration of mineral and regional geological survey,etc.With the development of high precision aeromagnetic exploration technology and the researchers draw more and more attention to the detailed geological structure of the shallow,the aeromagnetic exploration technology come to be used in the high precision exploration of the near surface shallow.By the use of unmanned aerial vehicle(UAV)mobile equipped platform,it can achieve the rapid and efficient exploration in a small area.Besides the use of the near surface shallow,the high precision aeromagnetic exploration technology is also one of the most effective methods in search for the deep concealed deposits.This thesis topic comes from the research project of the Department of land and Resources of Sichuan Province——Development and Research of Geomagnetic Resources in HeiZhuGou(KJ-2013-11).By studying of the geomagnetic anomaly investigation and geomagnetic medical applications in HeiZhuGou area,it makes contributions to the tourism planning and implementation that the geomagnetic anomaly as the core product of tourism development.The research accomplished using the method of aeromagnetic and ground magnetic auxiliary.Surveyor works in a few good geographic conditions using the ground high precision magnetic instruments,other areas where people can't get in using the UAV aerial survey method.Through geomagnetic data analysis and processing to divide abnormal distribution,distribution characteristics and geomagnetic anomaly within the planning area.Geomagnetic survey results provide not only magnetic theory support for tourism planning,but also provide the evidence for the source of magnetic anomaly and ecological environment when establishing the geomagnetic model in this regionDue to the geographical environment restriction,the ground magnetic survey instrument can't be implied in this area and it needed to develop small and low-altitude UAV magnetic measurement system.This thesis refers to the research of UAV flight control theory,types of interference,system testing,fluxgate-sensor calibration and data processing of UAV aeromagnetic system.There is a large error when making dynamic measurement by making use of fluxgate in the UAV aeromagnetic system.It is necessary to correct the data collected by sensors from the work area.After calibration,data were corrected and to be processed with directional derivative,upward continuation,forward and inverse finally to get geomagnetic support to the research.