Patent
Multi-resolution object location system and method
TLDR
In this paper, a multi-resolution object location system and method for locating objects is presented, which uses a long-range object locator together with a more precise RFID locator to efficiently and accurately determine the location of objects.Abstract:
A multi-resolution object location system and method for locating objects is provided. The multi-resolution system and method uses a long-range object locator together with a more precise RFID locator to efficiently and accurately determine the location of objects that include an RFID tag. The long-range object locator has a relatively longer range and can cover a relatively large area to determine the general location of the object within the large area. The RFID locator has a relatively shorter range, but is able to locate the object more precisely. The object location system uses the long-range locator to first determine the general location of the object, and then the RFID locator is used to determine a more accurate location of the object. Thus, the multi-resolution object location system is able to provide both a long range location of objects over a large area and a precise location of objects.read more
Citations
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Patent
Semi-passive radio frequency identification (RFID) tag with active beacon
TL;DR: A radio frequency beacon device for use with a backscatter interrogator includes a processor, a receiver coupled to the processor, and an active transmitter coupled to a processor as discussed by the authors, the active transmitter being configured to transmit an RF signal, in response to a trigger signal.
Patent
Multiple radio frequency network node RFID tag
Timothy P. Butler,Javier Berrios +1 more
TL;DR: In this paper, improved capabilities are described for a Radio Frequency ID (RFID) tag that contains multiple Radio Frequency (RF) network nodes that provide enhanced memory capabilities, redundant functionality, and multiple frequency capabilities to the RFID tag using an inter-RF network node communication connection.
Patent
RFID device for object monitoring, locating, and tracking
TL;DR: In this article, a first RFID device transmits at least two messages each including unique identifying information and a power level code, wherein the transmitter power level corresponds to the power level represented by the powerlevel code in each transmitted message.
Patent
Methods and systems of a multiple radio frequency network node RFID tag
Timothy P. Butler,Javier Berrios,Steve Beckhardt,Robert W. Hamlin,Larry Moore,David Puleston +5 more
TL;DR: In this article, improved capabilities are described for a Radio Frequency ID (RFID) tag that contains multiple Radio Frequency (RF) network nodes that may include memory storage for the RFID tag, the memory storage may include one time programmable (OTP) memory and many-time programmable memory and the storage of the information may be within the OTP and MTP memory.
Patent
Object monitoring, locating, and tracking method employing RFID devices
TL;DR: In this article, a method for monitoring a container having an RFID device interior comprises periodically transmitting messages including unique identifying information and receiving messages transmitted by the RFID devices interior the container by a receiving device exterior the container.
References
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Patent
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Patent
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Patent
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Patent
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TL;DR: In this paper, a method and system can locate an RF transponder based on phase differences between signals transmitted to the RF transmodal transceiver, where the second signal is compared with the first signal and a distance between the first and second transponders is determined based on the phase difference between the two signals.
Patent
Combined biometric reader/RFID circuit
TL;DR: In this paper, a circuit that combines the functionality of a biometric reader and an RFID circuit is provided, which uses certain functional blocks for processing both t h e biometric signals and the RFID signals.