Inversion of the Magnetic Field Generated by a Car

차량이 발생하는 자기장에 대한 역산

  • 임무택 (한국지질자원연구원 지질기반정보연구부) ;
  • 박영수 (한국지질자원연구원 지질기반정보연구부) ;
  • 임형래 (한국지질자원연구원 지질기반정보연구부) ;
  • 구성본 (한국지질자원연구원 지질기반정보연구부) ;
  • 정현기 (한국지질자원연구원 지반안전연구부) ;
  • 곽병욱 (충남대학교 자연과학대학 지구과학부)
  • Published : 2008.11.30

Abstract

We have constructed a car-borne magnetic exploration system, in which a car drags a non-magnetic cart on which a magnetometer is installed. In the total magnetic field measured as a vectorial sum in this system, are included the magnetic field generated by the car itself. This magnetic field, doing the role of a magnetic noise, should be eliminated. For this purpose, we have set up a measurement condition to get the same effect as if we have put the car in one point and thereafter measured the magnetic field around it. In this case, if there is any magnetically anomalous body in the area, we can consider all the remaining magnetic field to have been generated by the car itself, once the geomagnetic field eliminated. We tried to invert the magnetic field considered to have been generated by the car and succeeded to derive the magnetic moment and the direction of the induced and remanent magnetic field of the car respectively. Once the magnetic moment and the direction of the induced and remanent magnetic field have been calculated, the magnetic field generated by them in specific points can be directly and analytically calculated. This result can be used in the future to eliminate the magnetic field generated by the car itself doing the role of a magnetic noise during the procedure of reduction of the measured magnetic exploration data by the car-borne magnetic exploration system.

References

  1. 임무택, 박영수, 임형래, 구성본, 정현기, 2004, 차량자력탐사시 스템의 구축, 2004 대한지구물리학회/한국물리탐사학회 공동 학술대회 논문집, p. 77-82
  2. 임무택, 박영수, 정현기, 임형래, 구성본, 이영철, 2006, 차량 자 력탐사에서 차량의 영향의 제거, 2006 대한지구물리학회/한국 물리탐사학회 공동학술대회 논문집, p. 141-151
  3. Blakely, R. J., 1996, Potential Theory in Gravity and Magnetic Applications, Cambridge University Press
  4. Merril, R. T., McElhinny, M. W., McFadden, Ph. L., 1983, The magnetic Field of the Earth, Academic Press
  5. Stanley, J. M., 1977, Simplified magnetic interpretation of the geologic contact and thin dyke, 99. 1236-1240, n. 6, v. 42, Geophysics