Apparatus and method for locating, tracking, controlling and recognizing tagged objects using RFID technology
First Claim
1. A RFID system, comprising:
- a controller including a transceiver circuit; and
at least one RFID tag including a miniature circuit having a transceiver and a microcontroller, whereinthe at least one RFID tag is configurable to operate in at least one of a tracking mode and a non-tracking mode,when the at least one RFID tag is configured to operate in the tracking mode, the microcontroller of the RFID tag is configured to conserve power usage by intermittently activating the miniature circuit to listen for a tracking signal from the controller and powering down the miniature circuit, such that the miniature circuit, when activated, transmits a response signal to the controller upon receiving and recognizing the tracking signal transmitted from the transceiver of the controller, andwhen the at least one RFID tag is configured to operate in the non-tracking mode, the transceiver of the RFID tag is configured to activate the microcontroller for a period in response to detecting a predetermined incoming signal sequence, and the microcontroller, when activated, operates to take a predetermined action based on a coded inquiry signal transmitted from the transceiver of the controller in response to the RFID tag receiving and confirming the coded inquiry signal, wherein when the RFID tag is in the tracking mode, the controller is configured to periodically transmit tracking data to the RFID tag at predetermined time intervals,the RFID tag is configured to receive the tracking data according to the periodic transmission by the controller at the predetermined time intervals,the RFID tag is further configured to generate expected data based on the received tracking data which the RFID tag will search for in the next tracking data received at a next periodic transmission by the controller, andthe RFID tag is further configured to generate an answer signal to the controller in response to not receiving the expected data in the tracking data.
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Accused Products
Abstract
The present invention is directed to a miniaturized apparatus to locate, track, recognize and control objects using miniature RF circuits that are programmed as an active tag or as one of several embodiments of a controller, including one small enough to be incorporated into a personal object, like a ring. In its simplest embodiment, a portable or wearable controller communicates wirelessly with a tag secured to a surface, analogously to a car remote—push button, receive a signal from tag or back at the controller, to locate tagged object. In more complex forms, the tag can be integrated into objects or connected to a network. One controller can manage a plurality of tags. The basic platform of tag and controller can be built up to create a sophisticated area control with environmental sensors, inventory functions, tracking individuals and allowing or denying access, operating objects like doors and lights, and creating supporting ambient security with checks and balances between tags and controllers on people and their possessions, such as baggage at an airport. Arrays of tag or controllers extend the wireless range to accommodate large structures and areas. This novel system is self-contained, with a low power protocol to give long battery life time and does not require internet or GPS to perform its functions.
42 Citations
32 Claims
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1. A RFID system, comprising:
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a controller including a transceiver circuit; and at least one RFID tag including a miniature circuit having a transceiver and a microcontroller, wherein the at least one RFID tag is configurable to operate in at least one of a tracking mode and a non-tracking mode, when the at least one RFID tag is configured to operate in the tracking mode, the microcontroller of the RFID tag is configured to conserve power usage by intermittently activating the miniature circuit to listen for a tracking signal from the controller and powering down the miniature circuit, such that the miniature circuit, when activated, transmits a response signal to the controller upon receiving and recognizing the tracking signal transmitted from the transceiver of the controller, and when the at least one RFID tag is configured to operate in the non-tracking mode, the transceiver of the RFID tag is configured to activate the microcontroller for a period in response to detecting a predetermined incoming signal sequence, and the microcontroller, when activated, operates to take a predetermined action based on a coded inquiry signal transmitted from the transceiver of the controller in response to the RFID tag receiving and confirming the coded inquiry signal, wherein when the RFID tag is in the tracking mode, the controller is configured to periodically transmit tracking data to the RFID tag at predetermined time intervals, the RFID tag is configured to receive the tracking data according to the periodic transmission by the controller at the predetermined time intervals, the RFID tag is further configured to generate expected data based on the received tracking data which the RFID tag will search for in the next tracking data received at a next periodic transmission by the controller, and the RFID tag is further configured to generate an answer signal to the controller in response to not receiving the expected data in the tracking data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for operating a RFID system, wherein the system includes a controller;
- and at least one RFID tag including a miniature circuit having a transceiver and a microcontroller, the method comprising the steps of;
configuring the at least one RFID tag to operate in at least one of a tracking mode and a non-tracking mode; transmitting via the controller a coded inquiry signal to the at least one RFID tag; when the at least one RFID tag operates in the tracking mode, intermittently activating the miniature circuit to listen for a tracking signal from the controller and powering down the miniature circuit, and transmitting from the miniature circuit a response signal to the controller upon receiving and recognizing the tracking signal transmitted from the transceiver of the controller; and when the at least one RFID tag operates in the non-tracking mode, activating the microcontroller for a period in response to detecting a predetermined incoming signal sequence, and operating the microcontroller to take a predetermined action based on a coded inquiry signal transmitted from the transceiver of the controller in response to the RFID tag receiving and confirming the coded inquiry signal, wherein in the tracking mode, in the step of transmitting via the controller a coded inquiry signal, transmitting via the controller tracking data in the coded inquiry signal to the RFID tag at predetermined time intervals; and in the step of operating the microcontroller to take a predetermined action based on the coded inquiry signal, receiving in the RFID tag the tracking data according to the periodic transmission by the controller at the predetermined time intervals, generating in the RFID tag expected data based on the received tracking data which the RFID tag will search for in the next tracking data received at a next periodic transmission by the controller, and generating by the RFID tag an answer signal to the controller in response to not receiving the expected data in the tracking data. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
- and at least one RFID tag including a miniature circuit having a transceiver and a microcontroller, the method comprising the steps of;
Specification