Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2005-11-29
2005-11-29
Mullen, Thomas (Department: 2632)
Communications: electrical
Condition responsive indicating system
Specific condition
C324S243000, C340S572400, C340S572700, C348S143000
Reexamination Certificate
active
06970086
ABSTRACT:
A Wide Area Metal Detection (WAMD) system and method for security screening a crowd of people is provided. The system comprises at least one Magnetic Field Generator (MFG), e.g., a Horizontal Magnetic Field Generator (HMFG) buried below a walking surface for generating a magnetic field, a plurality of magnetic field sensors located within the sensing area of the MFG for sensing a metallic object, based on eddy currents in the magnetic field, and a location indicator for indicating a location of an individual with the metallic object at a position corresponding to that of one of the plurality of magnetic field sensors that sensed the metallic object. At least one video camera is included for identifying the individual at the location indicated by the location indicator and tracking further movements of the individual.
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Cooch Francis A.
Mullen Thomas
The Johns Hopkins University
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