Finding location and ranging explorer
First Claim
Patent Images
1. A system for determining presence and providing control, comprising:
- a radio frequency identification (RFID) tag;
a detector comprising an antenna, an RE interrogator, and an RF controller, the detector adapted to transmit interrogation signals to the RFID tag, to receive and decode presence signals from the RFID tag to determine whether the RFID tag is approaching the detector or moving away from the detector, and to generate instruction signals based on whether the RFID tag is approaching the detector or moving away from the detector; and
a central controller remote from the detector and adapted to receive the instruction signals and control at least one associated device in accordance with the instruction signals.
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Accused Products
Abstract
An RFID tag is used to determine the presence or absence of a user. Rules or instructions responsive to this presence or absence are implemented to control a device or multiple devices accordingly. In this manner, a device can be maintained in a normal operating mode if a user is present, even though a user is not actively interacting with the device. Moreover, the device can be shut down or locked or be on restricted access if an authorized user is no longer in the presence of the device.
50 Citations
31 Claims
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1. A system for determining presence and providing control, comprising:
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a radio frequency identification (RFID) tag; a detector comprising an antenna, an RE interrogator, and an RF controller, the detector adapted to transmit interrogation signals to the RFID tag, to receive and decode presence signals from the RFID tag to determine whether the RFID tag is approaching the detector or moving away from the detector, and to generate instruction signals based on whether the RFID tag is approaching the detector or moving away from the detector; and a central controller remote from the detector and adapted to receive the instruction signals and control at least one associated device in accordance with the instruction signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for determining presence and providing control, comprising:
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receiving a presence signal from at least one radio frequency identification (RFID) tag at a detector comprising an RF controller; determining whether the RFID tag is approaching the detector or moving away from the detector based on the presence signal; generating an output signal in response to the presence signal and whether the RFID tag is approaching the detector or moving away from the detector; providing the output signal to a remote central controller; and controlling at least one device, via the remote central controller, based on the output signal. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification