SURVEY SYSTEM FOR LOCATING GEOPHYSICAL ANOMALIES
First Claim
1. A survey system for locating geophysical anomalies, including a moving platform equipped with a recording unit for recording the position of the platform, the system also comprising three first measuring units, adapted to record a varying electric field strength and a varying magnetic field strength for frequencies in a chosen range at chosen intervals and thus positions, said first measuring units being adapted to measure each said field strength in three directions, the system including a calculation unit for combining the measurements from each of said first sensors and calculating the field strength vectors and recording at least one parameter based on said field strength vectors at each position, the system also being adapted to compare the recorded parameters at different positions and detect positions wherein said parameters differ significantly from the surrounding parameters at other positions.
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Abstract
A survey system is described for locating and classifying geophysical anomalies. It includes a moving platform equipped with a recording unit for recording the position of the platform. The system also comprises three first measuring units or sensors, adapted to record a varying electric field strength and a varying magnetic field strength at chosen intervals and thus positions, said first measuring units being adapted to measure said field strengths in three independent and mutually orthogonal directions at frequencies in a chosen range. The system includes a calculation unit for combining the measurements from each of said first sensors and calculating and recording as well as comparing the field strength vectors of the varying measured fields at each position, to find anomalies.
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Citations
21 Claims
- 1. A survey system for locating geophysical anomalies, including a moving platform equipped with a recording unit for recording the position of the platform, the system also comprising three first measuring units, adapted to record a varying electric field strength and a varying magnetic field strength for frequencies in a chosen range at chosen intervals and thus positions, said first measuring units being adapted to measure each said field strength in three directions, the system including a calculation unit for combining the measurements from each of said first sensors and calculating the field strength vectors and recording at least one parameter based on said field strength vectors at each position, the system also being adapted to compare the recorded parameters at different positions and detect positions wherein said parameters differ significantly from the surrounding parameters at other positions.
- 13. Method for locating geophysical anomalies, including the steps of moving a platform and recording the positions of the platform, and at each position measuring at least one of the magnetic or electric field strengths at said position in three dimensions and calculating and recording at least one parameter derived from the magnitude of said field strengths, and comparing the recorded field strength parameters to detect positions with parameters differing from the compatible surrounding parameters by a certain value at different frequencies in the chosen range.
Specification