Screening method and apparatus

A method and apparatus to screen individuals specifically for paramagnetic or ferromagnetic objects they may be carrying or wearing, before they enter a controlled area. The device comprises a screening portal, including at least one magnetic gradiometer and its electronics. The device places all of...

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Bibliographische Detailangaben
Hauptverfasser:	WOLFF STEPHEN, KUMAR SANKARAN, CZIPOTT PETER V, BURNETT LOWELL J
Format:	Patent
Sprache:	eng
Schlagworte:	DETECTING MASSES OR OBJECTS DIAGNOSIS GEOPHYSICS GRAVITATIONAL MEASUREMENTS HUMAN NECESSITIES HYGIENE IDENTIFICATION MEASURING MEDICAL OR VETERINARY SCIENCE PHYSICS SURGERY TESTING
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Beschreibung
Zusammenfassung:	A method and apparatus to screen individuals specifically for paramagnetic or ferromagnetic objects they may be carrying or wearing, before they enter a controlled area. The device comprises a screening portal, including at least one magnetic gradiometer and its electronics. The device places all of the sensor arrays in close proximity to a subject's body, for screening purposes. The portal has at least one excitation coil oriented to cause the excitation field to have zero mutual inductance with the gradiometers.