Anti-theft method for detecting the unauthorized opening of containers and baggage

• US 5,646,592 A
• Filed: 04/11/1995
• Issued: 07/08/1997
• Est. Priority Date: 07/27/1992
• Status: Expired due to Term

• Current Assignee: Round Rock Research LLC
• Original Assignee: Micron Communications, Inc. (Micron Technology, Inc.)
• Inventors: Tuttle, John R.
• Primary Examiner(s): Swann, Glen
• Application Number:
  US08/421,571
• Time in Patent Office: 819 Days
• Field of Search: 340/540, 340/541, 340/542, 340/547, 340/572, 340/652
• US Class Current: 340/545.6
• CPC Class Codes: G06K 19/07798 part of the antenna or the integrated circuit being adapted for rupturing or breaking, e.g. record carriers functioning as sealing devices for detecting not-authenticated opening of containers electronic seals G09F3/03
• CPC Class Codes: G08B 13/126 for a housing, e.g. a box, a safe, or a room
• CPC Class Codes: G08B 13/1427 with transmitter-receiver for distance detection
• CPC Class Codes: G08B 13/149 with electric, magnetic, capacitive switch actuation
• CPC Class Codes: G08B 21/0286 Tampering or removal detection of the child unit from child or article

Abstract

A simple trip-wire or magnetic circuit associated with a shipping container provides continuity, which is detected electrically. Simply, if continuity is disabled by a forced entry of the container, electrical detection means, such as a radio-frequency-identification (RFID) tag, will alert the owner or monitoring station. The trip-wire concept would require the replacing of a broken trip wire (resulting from forced entry), while the magnetic circuit concept can be reused repetitively. In a second embodiment, a magnetic circuit and the detection device (RFID tag) are embedded into the shipping article during manufacturing. The preferred detection device, an RFID tag, could also be a battery backed transceiver type on which a replaceable or rechargeable battery could be mounted on the inside of the shipping container during manufacturing. The RFID tag would communicate with an interrogator unit, which could be connected to a host computer. The interrogator and/or the host computer and/or other alarm devices would then monitor the shipping container'"'"'s status (opened or closed).

Claims

1. For an apparatus having an aperture which is selectably closed and opened by moving first and second members together and apart respectively, an improved security device for detecting whether the aperture is opened, comprising:

(a) an elongated electrical conductor having first and second ends, the conductor extending between the two closure members and being attached to both the first closure member and the second closure member so that the two closure members cannot be moved apart a substantial amount to open the aperture without breaking the conductor; and

(b) an RFID transceiver, connected to the two ends of the conductor, including an electrical circuit for detecting when electrical continuity between the two ends of the conductor is broken and subsequently transmitting an alarm signal, wherein the circuit of the RFID transceiver further includes;

(i) an alarm flagging circuit which indicates either a "see" condition or a "reset" condition according to whether the electrical continuity between the two ends of the conductor has or has not been broken;

(ii) a receiver circuit for receiving interrogation signals from an interrogator outside the RFID transceiver; and

(iii) a transmitter circuit for transmitting an alarm signal to the interrogator if the receiver receives an alarm data interrogation signal from the interrogator while the alarm flagging circuit indicates the "see" condition.

2. A security device according to claim 1, wherein the transmitter circuit does not transmit any signal to the interrogator if the receiver receives an alarm data interrogation signal while the alarm flagging circuit indicates the "reset" condition.

3. For a container having an aperture which is selectably closed and opened by moving first and second external walls together and apart, respectively, an improved security device for detecting whether the aperture is opened, comprising:

(a) an elongated electrical conductor having first and second ends, the conductor extending between the two container walls and being attached to both walls so that the two walls cannot be moved apart a substantial amount to open the aperture without breaking the conductor; and

(b) an RFID transceiver, connected to the two ends of the conductor, including an electrical circuit for detecting when electrical continuity between the two ends of the conductor is broken and subsequently transmitting an alarm signal, wherein the RFID transceiver is embedded within a wall of the container, and wherein the RFID transceiver includes a replaceable battery which is mounted so as to be accessible only from the interior of the container.

4. For a suitcase bounded by first and second opposing, concave side members attached together by a hinge mounted on one end of each side member, the suitcase having an aperture which is selectably closed and opened by moving said first and second side members together and apart, respectively, an improved security device for detecting whether the aperture is opened, comprising:

(a) an elongated electrical conductor having first and second ends, the conductor extending between the two side members and being attached to the two side members so that the two side members cannot be moved apart a substantial amount to open the aperture without breaking the conductor, the elongated conductor being attached to the first and second side members so as to extend between them at an end of each side member opposite the end on which the hinge is mounted; and

(b) an RFID transceiver, connected to the two ends of the conductor, including an electrical circuit for detecting when electrical continuity between the two ends of the conductor is broken and subsequently transmitting an alarm signal.

5. For a suitcase having a handle on having an aperture which is selectably closed and opened by moving first and second external walls of the suitcase together and apart, respectively, an improved security device for detecting whether the aperture is opened, comprising:

(a) an elongated electrical conductor having first and second ends, the conductor extending between the two walls and being attached to the two walls so that the two walls cannot be moved apart a substantial amount to open the aperture without breaking the conductor; and

(b) an RFID transceiver, connected to the two ends of the conductor, including an electrical circuit for detecting when electrical continuity between the two ends of the conductor is broken and subsequently transmitting an alarm signal, wherein the RFID transceiver is mounted on a strap encircling and attached to the handle.

6. For a doorway apparatus having an aperture which is selectably closed and opened by moving a door and a door frame together and apart, respectively, an improved security device for detecting whether the aperture is opened, comprising:

(a) an elongated electrical conductor having first and second ends, the conductor extending between the door and the door frame and being attached to both the door and the frame so that the door and the frame cannot be moved apart a substantial amount to open the aperture without breaking the conductor; and

(b) an RFID transceiver, connected to the two ends of the conductor, including an electrical circuit for detecting when electrical continuity between the two ends of the conductor is broken and subsequently transmitting an alarm signal.

7. For an apparatus having an aperture which is selectably closed and opened by moving first and second closure members together and apart, respectively, an improved security device for detecting whether aperture is opened, comprising:

(a) an electrical device, mounted on the apparatus adjacent the aperture, for detecting whether the aperture is open or closed, wherein the electrical device includes;

(i) first and second magnetic contacts mounted on the first closure member, and

(ii) a third magnetic contact mounted on the second closure member at a position such that, when the two closure members are moved together so as to close the aperture, the third magnetic contact mates with both the first and the second contacts; and

(b) an RFID transceiver which transmits an alarm signal after said device detects the aperture been opened.

8. A security device according to claim 7, wherein:

(a) said apparatus is a suitcase bounded by first and second opposing, concave side members attached together by a hinge mounted on one end of each side member, the first and second side members being the first and second closure members, respectively;

(b) the first and second magnetic contacts are mounted at an end of the first side member opposite the end on which the hinge is mounted; and

(c) the third magnetic contact is mounted at an end of the second side member opposite the end on which the hinge is mounted.

9. A security device according to claim 7, wherein first and second electrical connections extend from the RFID transceiver to the first and second magnetic contacts, respectively, and wherein the third magnetic contact completes an electrical circuit between the first and second magnetic contacts upon mating with the first and second magnetic contacts.

10. For an apparatus having an aperture which is selectably closed and opened by moving first and second closure members together and apart, respectively, an improved security device for detecting whether the aperture is opened, comprising:

(a) an electrical device, mounted on the apparatus adjacent the aperture, for detecting whether the aperture is open or closed; and

(b) an RFID transceiver which transmits an alarm signal after said device detects the aperture has been opened, wherein the RFID transceiver includes;

(i) an alarm flagging circuit which indicates either a "see" condition or a "reset" condition according to whether the electrical device detects the aperture has or has not been opened;

(ii) a receiver circuit for receiving interrogation signals from an interrogator outside the RFID transceiver, and

(iii) a transmitter circuit for transmitting an alarm signal to the interrogator if the receiver receives an alarm data interrogation signal from the interrogator while the alarm flagging circuit indicates the "set" condition.

11. A security device according to claim 10, wherein the transmitter circuit does not transmit any signal to the interrogator of the receiver receives an alarm data interrogation signal while the alarm flagging circuit indicates the "reset" condition.

12. For a container apparatus having an aperture which is selectably closed and opened by moving first and second external walls of the container together and apart, respectively, an improved security device for detecting whether the aperture is opened, comprising:

(a) an electrical device, mounted on the apparatus adjacent the aperture, for detecting whether the aperture is open or closed; and

(b) an RFID transceiver, embedded within a wall of the container, which transmits an alarm signal after said device detects the aperture has been opened, wherein the RFID transceiver includes a replaceable battery which is mounted so as to be accessible only from the interior of the container.

13. For a suitcase having a handle and having an aperture which is selectably closed and opened by moving first and second external walls of the suitcase together and apart, respectively, an improved security device for detecting whether the aperture is opened, comprising:

(a) an electrical device mounted on the suitcase adjacent the aperture, for detecting whether the aperture is open or closed; and

(b) an RFID transceiver mounted on a strap encircling and attached to the handle which transmits an alarm signal after said device detects the aperture has been opened.

14. For a doorway apparatus having an aperture which is selectably closed and opened by moving a door and a door frame together and apart, respectively, an improved security device for detecting whether the aperture is opened, comprising:

(a) an electrical device, mounted on the doorway apparatus adjacent the aperture, for detecting whether the aperture is open or closed; and

(b) an RFID transceiver which transmits an alarm signal after said device detects the aperture has been opened.

15. For an apparatus having an aperture which is selectably closed and opened by moving first and second closure members together and apart, respectively, an improved security device for detecting whether the aperture is opened, comprising:

(a) an electrical device, mounted on the apparatus adjacent the aperture, for detecting whether the aperture is open or closed, wherein the electrical device includes;

(i) first and second electrical contacts mounted on the first closure member, and

(ii) a third electrical contact mounted on the second closure member at a position such that, when the two closure members are moved together so as to close the aperture, the third magnetic contact mates with both the first and the second contacts so as to complete an electrical circuit between the first and second contacts; and

(b) an RFID transceiver which transmits an alarm signal after said device detects the aperture has been opened.