Security tag detection system

Details Security tag detection system Security tag detection system

G - Physics

08

B

340/124.3

G08B 13/24 (2006.01) G01V 3/10 (2006.01)

Patent

CA 1234892

ABSTRACT Security apparatus for detection of a security tag to be hidden in an article to be detected. The digitized waveshape of a tag signature signal preferably obtained by distortion of an oscillating magnetic field, (whereby the distortion signal being detected constitutes a signature signal) is compared with a stored digital representative of a signature signal, and an alarm enable signal is generating in the event of correlation a predetermined number of times in a predetermined time period. The stored signal is modified by the specific chacteristics of the apparatus and of environmental factors. The result is a reliable detection apparatus with a very low false alarm rate.

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