Communications: electrical – Continuously variable indicating – With meter reading
Patent
1994-07-27
1997-02-11
Zimmerman, Brian
Communications: electrical
Continuously variable indicating
With meter reading
34082549, 340572, 342 44, 342 51, H04B 700
Patent
active
056025386
ABSTRACT:
Apparatus and method of identifying a plurality of transponders (10-16) entering into an inquiry field (18) of an interrogation unit (20) are provided. The transponders (10-16) are each assigned a unique identification code. Upon receipt of an interrogation pulse from the interrogation unit (20), each transponder (10-16) responds with its respective identification code. Depending on the spatial distance of each transponder (10-16) with respect to the interrogation unit (20), the interrogation unit (20) detects and receives the strongest response. The received identification code is stored. The interrogation unit (20) repeatedly sends interrogation pulses containing any stored identification code until all of the transponders (10-16) are identified and read.
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Hagl Andreas
Orthmann Kurt
Donaldson Richard L.
Kesterson James C.
Mapstone Rebecca A.
Texas Instruments Incorporated
Wilson Jr. William H.
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