Digital signal processor for electronic article gates

Details Digital signal processor for electronic article gates Digital signal processor for electronic article gates

G - Physics

08

B

340/124.3

G08B 13/24 (2006.01)

Patent

CA 2033244

A frequency swept electromagnetic field is generated in an interrogation zone and signals received from the interrogation zone are processed to detect the presence of a marker with a resonant tank circuit in the zone. Detection is determined by the use of averaging techniques and shape recognition persistence tables are generated whereby the background can be isolated.

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