System and sensor for RFID-enabled information collection
A system and sensor provides for radio frequency identification (RFID)-enabled information collection. The system includes a ring-shaped element and an antenna. The ring-shaped element includes a conductive ring and an RFID integrated circuit. The antenna is spaced apart from the ring-shaped element and defines an electrically-conductive path commensurate in size and shape to at least a portion of the conductive ring. In an alternate embodiment, the sensor system further comprises a reference ring-shaped element in a fixed relationship with respect to the antenna, with the reference ring-shaped element defining another series circuit to include an electrically-conductive reference ring and a reference RFID integrated circuit. The system may include an interrogator for energizing the ring-shaped element and receiving a data transmission from the RFID integrated circuit that has been energized for further processing by a processor.
1. A sensor system for radio frequency identification (RFID)-enabled information collection, comprising:
a moveable support;
a ring-shaped element including an electrically-conductive ring and an RFID integrated circuit electrically coupled to said electrically-conductive ring, the ring-shaped element being coupled to said moveable support for movement therewith; and
an antenna spaced apart from said ring-shaped element, said antenna defining an electrically-conductive path commensurate in size and shape to at least a portion of said electrically-conductive ring.
2. The sensor system of claim 1 , wherein said electrically-conductive path is parallel to said ring-shaped element.
3. The sensor system of claim 1 , wherein said ring-shaped element is rectangular.
4. The sensor system of claim 1 , wherein said antenna is selected from the group consisting of a microstrip patch antenna, a slot antenna, a dipole antenna, and a planar inverted-F antenna.
5. The sensor system of claim 1 , further comprising a reference ring-shaped element in a fixed relationship with respect to said antenna, said reference ring-shaped element including an electrically-conductive reference ring and a reference RFID integrated circuit electrically coupled to said electrically-conductive reference ring.
6. A sensor system for radio frequency identification (RFID)-enabled information collection, comprising:
a moveable substrate;
a ring-shaped element lying in a plane of said moveable substrate and coupled thereto for movement with said substrate, said ring-shaped element defining a series circuit to include an electrically-conductive rectangular ring and an RFID integrated circuit;
a fixed body; and
an antenna coupled to said fixed body and spaced apart from said ring-shaped element, said antenna defining an electrically-conductive path commensurate in size and shape to at least a portion of said rectangular ring, said electrically-conductive path being parallel to said plane.
7. The system of claim 6 , wherein said antenna is selected form the group consisting of a microstrip patch antenna, a slot antenna, a dipole antenna, and a planar inverted-F antenna.
8. The sensor system of claim 6 , further comprising a reference ring-shaped element in a fixed relationship with respect to said antenna, said reference ring-shaped element defining another series circuit to include an electrically-conductive reference ring and a reference RFID integrated circuit.
9. A sensor system for radio frequency identification (RFID)-enabled information collection, comprising:
a moveable support;
a ring-shaped element including an electrically-conductive ring and an RFID integrated circuit electrically coupled to said electrically-conductive ring, the ring-shaped element being coupled to said moveable support for movement therewith;
an antenna spaced apart from said ring-shaped element, said antenna defining an electrically-conductive path commensurate in size and shape to at least a portion of said electrically-conductive ring; and
a reference ring-shaped element in a fixed relationship with respect to said antenna, said reference ring-shaped element including an electrically-conductive reference ring and a reference RFID integrated circuit electrically coupled to said electrically-conductive reference ring.
10. The sensor system of claim 9 , wherein said electrically-conductive path is parallel to said ring-shaped element.
11. The sensor system of claim 9 , wherein said ring-shaped element is rectangular.
12. The sensor system of claim 9 , wherein said antenna is selected from the group consisting of a microstrip patch antenna, a slot antenna, a dipole antenna, and a planar inverted-F antenna.
13. A system for radio frequency identification (RFID)-enabled information collection, comprising:
a movable support;
at least one ring-shaped element, each said at least one ring-shaped element including an air electrically-conductive ring and an RFID integrated circuit electrically coupled to said electrically-conductive ring, each said at least one ring-shaped element coupled to said movable support for movement therewith;
a fixed body;
an antenna coupled to said fixed body, said antenna defining an electrically-conductive path commensurate in size and shape to at least a portion of said electrically-conductive ring;
a reference ring-shaped element coupled to said fixed body, said reference ring-shaped element maintained in a fixed relationship with respect to said antenna, said reference ring-shaped element including an electrically-conductive reference ring and a reference RFID integrated circuit electrically coupled to said electrically-conductive reference ring, said reference ring element being positioned to be energized by said electromagnetic energy emanating from said antenna;
interrogator for transmitting a signal to said antenna wherein said electric current is generated along said electrically-conductive path and electromagnetic energy emanates from said antenna, wherein at least one of said at least one ring-shaped element and said RFID integrated circuit associated therewith is energized by said electromagnetic energy, and wherein each said RFID integrated circuit so-energized generates a data transmission to receipt by said interrogator; and
a processor coupled to said interrogator to deriving information directed to position of said movable support as related to position of said fixed body using said data transmission.
14. The system of claim 13 , wherein said electrically-conductive path is parallel to said plane.
15. The system claim 13 , wherein each said at least one ring-shaped element is rectangular.
16. The system of claim 13 , wherein said data transmission includes a unique identity for each said RFID integrated circuit.
17. The system of claim 13 , wherein said antenna is selected from the group consisting of a microstrip patch antenna, a slot antenna, a dipole antenna, and a planar inverted-F antenna.
18. The system of claim 13 , further comprising a spring operatively connected between said movable support and said fixed body, wherein said movable support experiences movement whenever an object with mass is attached thereto.
19. The system of claim 13 , wherein said movable support and said fixed body comprise a portion of a product dispenser adapted to store products, and wherein said movable support experiences movement whenever one of the products is removed from said product dispenser.
20. The system of claim 19 , further comprising an elastic element coupled to said movable support and to said fixed body for causing said movement of said movable support whenever one of the products is removed from said product dispenser.
21. The system of claim 13 , wherein said data transmission includes a received signal strength indication (RSSI).
22. The system of claim 13 , wherein said data transmission includes magnitude and phase information associated therewith.