Detection of articles in adjacent passageways

Details Detection of articles in adjacent passageways Detection of articles in adjacent passageways

G - Physics

08

B

340/124.3

G08B 13/24 (2006.01)

Patent

CA 1163344

ABSTRACT OF THE DISCLOSURE An article theft detection system for identifying which of two adjacent passageways a protected article passes. Each passageway is provided with spaced apart interrogation and receiver antennas, but a single receiver antenna services both passageways. Multiplexing is used to energize the interrogation antennas in alternate sequence. The single receiver antenna is connected to a single receiver whose output is connected through switches, synchronized with the interrogation multiplexing, to separate alarms for each passageway.

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