摘要:
Methods and apparatuses for extracting information from a database based on tag data are provided. One method includes interrogating a plurality of RFID tags coupled with objects within in an area to obtain tag data. The contextual environment of the area is determined based on the tag data. A search of a database relating to an item in the area is conducted. Relevance rankings of search results are adjusted based upon the determined contextual environment. Search results can be displayed in order of relevance rankings.
摘要:
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.
摘要:
Described are RF tracking system and method. The RF system may include a shell for holding a plurality of containers which store a material that interferes with RF communications. The shell includes a bottom container supporting surface and a plurality of leg extensions attached thereto; the shell extends away from the bottom surface. The tracking system also includes at least one RF tag attached to a first one of the leg extensions. The tag has a memory arrangement storing data relating to at least one of an identity of the shell, an identity of the containers held in the shell and a material stored in the containers. Furthermore, the tracking system includes at least one RF scanner communicating with the tag to collect the data and a computing arrangement which includes a database and communicating with the scanner to update the database as a function of the collected data. The tag is situated at a predetermined distance away from the containers held in the shell to overcome an electromagnetic dampening effect of the material.
摘要:
An apparatus is provided for an inventory transport device having a fixed section and a movable section. The apparatus comprises a RFID reader device mounted on the movable section; and a RFID power device mounted on the fixed section. The RFID power device provides power to the RFID reader device without physical contact.
摘要:
A system for communicating data through a network is disclosed. The system includes at least one access point and at least one mobile unit. The access point includes an access point processor, a wireless transceiver and an RFID transceiver. The wireless transceiver is coupled to the access point processor and the wireless transceiver is configured to receive and transmit data to a wireless device in the wireless local area network. The RFID transceiver is coupled to the access point processor and the RFID transceiver is configured to receive data from at least one mobile unit in the wireless local area network when the wireless transceiver is unavailable. The mobile unit includes a mobile unit processor, a mobile unit wireless transceiver and a mobile unit RFID transceiver. The mobile unit wireless transceiver is coupled to the mobile unit processor and the mobile unit wireless transceiver is configured to receive and transmit data to the access point. The mobile RFID transceiver is coupled to the mobile unit processor and the mobile unit processor is configured to send data to the RFID transceiver of the access point when the wireless transceiver of the access point is unavailable.
摘要:
A system and method is provided for locating objects using RFID tags. The system and method uses an RFID reader and a distance calculator to efficiently and accurately determine the location of objects that include an RFID tag. The RFID reader transmits a plurality of signals to the RFID tag, with the plurality of signals having different fundamental frequencies. In response, the RFID tag backscatter modulates the plurality of transmitted signals to create a plurality of backscatter modulated signals. The RFID reader receives and demodulates the plurality of backscatter modulated signals. The distance calculator determines the phase of the plurality of backscatter modulated signals and determines a rate of change of the phase in the backscatter modulated signals with respect to the rate of change in the fundamental frequency of the transmitted signals and uses this information to calculate the distance to the RFID tag.
摘要:
A system is provided for communication and sensory monitoring. The system comprises a plurality of nodes installed as a network in a structure. Each of the plurality of nodes comprises an internode transceiver for wireless communication between nodes, a wireless network transceiver for wireless communication with one or more wireless devices, one or more sensors for monitoring the environment of the structure and a processor coupled to the internode transceiver, the wireless network transceiver and the one or more sensors to exchange data with the internode transceiver, the wireless network transceiver and the one or more sensors devices coupled to the processor and process the data. The system also includes a wide area network bridge coupled to the plurality of network nodes. The network bridge receives data from the plurality of network nodes and passes the information to a computer network for processing.
摘要:
Systems and methods for opportunistically charging a rechargeable power source of a portable electronic unit are provided. The system includes a primary inductance assembly energized by a main power source for inducing an electro-magnetic flux in a secondary coil assembly associated with a power source of the portable unit. Such electro-magnetic flux creates an electric current that is subsequently employed for charging the power source of the portable unit. A controller of the charging system can monitor state of charge, and notify a user when a recharge is required. Scavenging modes may also be employed for recharging the main power source and the rechargeable source of the portable unit.
摘要:
A dual mode mobile unit is arranged to communicate in either a first or second data communications standard, such as combined Bluetooth and 802.11 operation. An interface unit converts received Bluetooth or 802.11 format signals into 802.11 frame format data signals to be provided to a digital signal processor which is programmed to process signals in either standard. The dual mode mobile unit can operate in the 802.11 standard to reserve a time interval for Bluetooth activity during which other 802.11 units will avoid-transmissions to avoid interference.
摘要:
A RFID tag for use in an RFID system is disclosed. The RFID tag comprises an antenna operable to receive a carrier wave from an RFID reader. A state machine is coupled to the antenna and receives a backscattering command comprising a backscattering parameter for the RFID tag to use for backscattering the carrier wave. A modulator is coupled between the antenna and the state machine. The modulator produces a modulated backscatter signal, based at least partially dependent on the backscattering command.