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US 2006/0214789 A1Published application
Tamper detection with RFID tag
OwnerJoshua Posamentier, Jeremy Burrinventors
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Abstract
A sensor may be used to detect a previous or current change of state, and the change may be reported by a radio frequency identification (RFID) tag. In some embodiments, the change may represent a broken security seal, which in turn may affect an electrical connection that can be sensed by the RFID tag during operation of the RFID tag.
Claims22
An apparatus, comprising:
- a radio frequency identification (RFID) tag circuit;
- an electrical element electrically coupled to the RFID tag circuit and mechanically disposed such that occurrence of a particular physical event will change the electrical coupling to the RFID tag circuit;
- wherein the apparatus is adapted to transmit a first signal if the electrical coupling is unchanged and to transmit a second signal, different than the first signal, if the electrical coupling is changed.
A system, comprising:
- a container including a movable part that may operate to open the container;
- a radio frequency identification (RFID) tag;
- an electrical element electrically coupled to the RFID tag and mechanically disposed such that opening the container will change electrical continuity between the electrical element and the RFID tag;
- wherein the RFID tag is adapted to respond to an RFID poll by transmitting a status of the electrical continuity.
1 more element
A method, comprising:
- receiving a radio frequency identification (RFID) poll by an RFID tag;
- and
- responding to the RFID poll with a transmission of data;
- wherein the data includes at least one bit to indicate whether a container has been opened.
1 more element
A method, comprising:
- transmitting a wireless poll;
- receiving a response to the poll from a radio frequency identification (RFID) tag;
- and
- examining the response to determine if a security sensor that was coupled to the RFID tag has detected a status change.
1 more element
Dependencies are inferred from the claim text.