Combined electromagnetic sensor and magnetometer

Details Combined electromagnetic sensor and magnetometer Combined electromagnetic sensor and magnetometer

2011-04-05

2011-04-05

Whittington, Kenneth J (Department: 2858)

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

For small object detection or location

C324S239000

Reexamination Certificate

active

07919964

ABSTRACT:
A combined electromagnetic and magnetometer detection system for detecting objects. The system includes a primary electromagnetic transmitter for generating a primary magnetic field; an electromagnetic sensor for sensing secondary magnetic fields generated by a target region subjected to the primary magnetic field; a magnetometer sensor substantially centered at a center of the primary magnetic field; a compensation transmitter for generating a compensating magnetic field that substantially negates the primary magnetic field across the magnetometer sensor; and a signal generator electrically connected to the primary electromagnetic transmitter and the compensation transmitter for driving the transmitters to generate the primary magnetic field and the compensating magnetic field, respectively.

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Geonics Limited, “Mapping Systems—Metal Detectors”, published as early as 2006.

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