| As an economic and efficient geophysical exploration technique, the magneticexploration is widely used in geological survey, mining geophysical prospecting, andmilitary applications. Due to Anomalous magnetic field caused by the magnetic bodyis superimposed on the earth’s magnetic field, how to eliminate the influence of theearth’s magnetic field is key to interpretation the information of Anomalous magneticfield. The magnetic tensor gradiometer is used to measure the spatial derivatives ofthree orthogonal magnetic field components, and we should get the attitude data of themagnetic tensor gradiometer at the same time. For The earth’s magnetic fieldcomponent gradient is very small, That is why anomalous magnetic field gradient canbe efficiently made from the measured data.This thesis introduces theory of magnetic gradient tensor and the works of GNSS/inertial navigation combined system. Then analysis works of the magnetic tensorgradiometer serial communication and IAPS20inertial navigation system networkport communication, In the end, detailed design the aeromagnetic tensor explorationdata synchronization technology. The attitude coordinate transformation equationwhich is based on the correspondence between the geographic coordinate system andthe vector coordinate system is established to provide a theoretical basis for theaeromagnetic survey posture coordinate transformation. Theseare bottleneck problem and difficulty of the paper. Concretely,the main contentincludes the following aspects.(1)This thesis gives an introduction of magnetic survey,especially introducestheory of the magnetic gradient tensor. Then it introduce several technology ofmagnetic gradient tensor and the development trends at home and abroad. Analysisthe entire hardware system design, in the form of hardware schematic connection diagram given the composition of the various parts of the whole system and itsinterconnected relationship.(2) Analysis works of HTS-SQUID and IAPS20inertial navigation systemnetwork port communication, and discusses the API functions for serial programmingand the network port programming, development for the three-component fluxgatemagnetometer serial communication software, and the form of a flow chart ofsoftware running is described, based on TCP/IP protocol, means of communicationbetween the GNSS/inertial navigation combined system and PC104industrialController was designed, designed the network port communications software basedon Sockets, and given network port communications software key code comments,Ethernet port communication software running ideas given in the form of a flowchart.(3) In the measurement of airborne tensor magnetic, The magnetic tensorgradiometer attitude change will cause the measured magnetic field gradient generatelarge fluctuations，influenced the explanation for abnormal data and inversion，Withinertial navigation system of sensor posture information for measurement of tensordata，Must make the pledge that we used to derivative according to with the tensordata in strict accordance in the collection point in time，In order to solve thisproblem，detailed design the aeromagnetic tensor exploration data synchronizationtechnology。(4) The data collected by the inertial navigation system is based on thegeographic coordinate system. And the data collected by The magnetic tensorgradiometer is based on the carrier coordinate system. The attitude coordinatetransformation equation which is based on the correspondence between thegeographic coordinate system and the carrier coordinate system is established toprovide a theoretical basis for the magnetic tensor survey posture coordinatetransformation.(5) Designed three test trials for system: Matlab software for processing theexperimental data shows the waveform, and the results were analyzed.(6) The whole conclusion is given in this paragraph. The author analyzes theissues of this equipment and points out the research and test which should be gone on for this equipment in the future to improve the accuracy of the system. |
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