RFID SYSTEM AND A METHOD FOR MANIPULATING PASSIVE RFID TAGS

• US 20150356329A1
• Filed: 06/08/2015
• Published: 12/10/2015
• Est. Priority Date: 06/08/2014
• Status: Active Grant

• Current Assignee: Elad Domanovitz, Uri Erez
• Original Assignee: Elad Domanovitz, Uri Erez
• Inventors: Erez, Uri, Domanovitz, Elad
• Granted Patent: US 9,424,449 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06K 7/10128 the step consisting of detection of the presence of one or more record carriers in the vicinity of the interrogation device
• CPC Class Codes: G06Q 30/00 Commerce

Abstract

A method, comprising: sending, by a radio frequency identification (RFID) reader, an identification request to an RFID tag; wherein the RFID tag is positioned within a coverage area of the RFID tag; searching, by the RFID reader, a lack of response from the RFID tag to the identification request during a silent period that ranges between a fraction of a second and a minute; and controlling, by the RFID reader and in response to a detection of the lack of response, a circuit that differs from the RFID reader and the RFID tag.

Claims

1. A method, the method comprising:

sending, by a radio frequency identification (RFID) reader, an identification request to an RFID tag;

wherein the RFID tag is positioned within a coverage area of the RFID tag;

searching, by the RFID reader, for a lack of response from the RFID tag to the identification request during a silent period that ranges between a fraction of a second and a minute; and

controlling, by the RFID reader and in response to a detection of the lack of response, a circuit that differs from the RFID reader and the RFID tag.

2. The method according to claim 1 wherein the sending of the identification request is preceded by successfully receiving from the RFID tag a response to a previous identification request.

3. The method according to claim 1 comprising sending a group of spaced apart identification requests to the RFID tag;

searching for a first pattern that comprises multiple spaced apart silent periods that range between a fraction of a second and a minute; and

controlling the circuit in response to a detection of the first pattern.

4. The method according to claim 1 comprising sending to multiple RFID tags the identification request;

searching, by the RFID reader, for a second pattern that comprises at least one lack of response from at least one of the multiple RFID tags to the identification request during at least one silent period that ranges between a fraction of a second and a minute; and

controlling the circuit in response to a detection of the at least one silent period.

5. The method according to claim 4 wherein the RFID reader is configured to select a control command out of multiple control commands based upon at least one RFID tag that is associated with the at least one silent period.

6. The method according to claim 4 wherein the second pattern corresponds to an identification key.

7. The method according to claim 1 wherein the controlling of the circuit comprises activating the circuit and deactivating the circuit.

8. The method according to claim 1 wherein the controlling of the circuit comprises activating the circuit, deactivating the circuit and determining a manner in which the circuit operated after the circuit is activated.

9. The method according to claim 1 wherein the controlling of the circuit is responsive to a duration of the silent period.

10. A system comprising a radio frequency identification (RFID) reader that comprises a radio frequency (RF) transmitter, an RF receiver and a processor;

wherein the RF transmitter is configured to send an identification request to an RFID tag;

wherein the RFID tag is positioned within a coverage area of the RFID tag;

wherein the RF receiver is configured to receive RF signals from the RFID tag;

wherein the processor is configured to search for a lack of response from the RFID tag to the identification request during a silent period that ranges between a fraction of a second and a minute; and

control, in response to a detection of the lack of response, a circuit that differs from the RFID reader and the RFID tag.

11. The system according to claim 10 further comprising the RFID tag.

12. The system according to claim 10 wherein the RFID reader is configured to send to multiple RFID tags the identification request;

wherein the processor is configured to search for a second pattern that comprises at least one lack of response from at least one of the multiple RFID tags to the identification request during at least one silent period that ranges between a fraction of a second and a minute; and

wherein the processor is configured to control the circuit in response to a detection of the at least one silent period.

13. The system according to claim 12 wherein the multiple RFID tags form an RFID keypad.

14. The system according to claim 13 wherein the RFID keypad comprises an interface for detachably connecting the RFID keypad to a windshield.

15. A non-transitory computer readable medium that stores instructions that once executed by a radio frequency identification (RFID) reader causes the RFID reader to send an identification request to an RFID tag;

wherein the RFID tag is positioned within a coverage area of the RFID tag;

search for a lack of response from the RFID tag to the identification request during a silent period that ranges between a fraction of a second and a minute; and

control, in response to a detection of the lack of response, a circuit that differs from the RFID reader and the RFID tag.