Apparatus for detecting ferromagnetic objects and a protected doorway assembly

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United States of America Patent

PATENT NO 9514624
APP PUB NO 20130285810A1
SERIAL NO

13817779

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Abstract

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Apparatus for detecting a ferromagnetic object to protect, for example, a doorway to an MRI room comprises a passive primary sensor apparatus comprising at least one first magnetic sensor, a secondary non-magnetic sensor apparatus comprising at least two sensors, a detection zone for one of the secondary sensors being distinct from the zone of the other one of the secondary sensors, a signal processing circuit arranged in communication with the primary and secondary sensor apparatus, and a warning device. The signal processing circuit identifies temporal variations in the signal from the primary sensor and correlate them with instances in which both sensors of the secondary, non-magnetic, sensor apparatus detect the presence of an object in their respective zones.

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Patent Owner(s)

Patent OwnerAddress
METRASENS LIMITEDMALVERN WORCESTERSHIRE WR14 1GL

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Wooliscroft, Matthew J Worcestershire, GB 1 1

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