Radio frequency access control system and method

摘要

An access control system includes a transmitter initiator that has a magnetic flux antenna constructed and arranged to direct magnetic energy in an angular direction, a plurality of RF tone detectors, a microcontroller, and a plurality of RF burst generators. The system includes at least one receiver responder that has a magnetic flux antenna, a plurality of RF tone detectors, a microcontroller, and a RF burst generator. The transmitter initiator's magnetic flux antenna and the receiver responder's magnetic flux antenna define an open-air gap therebetween. The transmitter initiator's magnetic flux antenna has a paramagnetic housing, electromagnetic windings within the paramagnetic housing, and at least one ferromagnetic element disposed within the open air gap. The paramagnetic housing and the ferromagnetic element are constructed and arranged to direct a magnetic field across the open air gap. The system is configured for wireless communication via near-field magnetic induction.

主权项

1. An access control system comprising:
at least one receiver-responder comprising
a receiver-responder magnetic flux antenna,a plurality of RF tone detectors electrically coupled with the receiver-responder magnetic flux antenna,a microcontroller electrically coupled with the plurality of RF tone detectors,a responder RF burst generator electrically coupled with the microcontroller and the receiver-responder magnetic flux antenna; and a transmitter initiator comprising
a transmitter-initiator magnetic flux antenna constructed and arranged to direct a magnetic field in a particular angular direction across an open-air gap, wherein the transmitter-initiator magnetic flux antenna and the receiver-responder magnetic flux antenna define the open-air gap therebetween, and wherein the transmitter-initiator magnetic flux antenna comprises
a paramagnetic housing,electromagnetic windings disposed within the paramagnetic housing, andat least one ferromagnetic element disposed within the open-air gap, wherein the paramagnetic housing and the ferromagnetic element are constructed and arranged to direct the magnetic field in the particular angular direction across the open-air gap, anda plurality of RF tone detectors electromagnetically coupled with the transmitter-initiator magnetic flux antenna,a transmitter-initiator microcontroller electromagnetically coupled with the plurality of RF tone detectors, the transmitter-initiator microcontroller demodulating communication from the receiver responder and controlling communication to the receiver responder, anda plurality of RF burst generators electrically coupled with the transmitter-initiator microcontroller and with the transmitter-initiator magnetic flux antenna; wherein the system wirelessly communicates between the transmitter initiator and the at least one receiver responder disposed in the specific angular region via near-field magnetic induction across the open-air gap; and wherein the microcontroller of the receiver responder demodulates communication from the transmitter initiator and controls communication to the transmitter initiator.