Asset recovery system

• US 20090207050A1
• Filed: 02/12/2009
• Published: 08/20/2009
• Est. Priority Date: 02/14/2008
• Status: Active Grant

• Current Assignee: Calamp Wireless Networks Inc. (CalAmp Corporation)
• Original Assignee: LoJack Operating Company, LP (Solera Holdings Incorporated)
• Inventors: Wooters, Thomas A., Arpin, Claude, Ramadorai, Arvind K., Lipowski, Joseph T., Duvall, William R.
• Granted Patent: US 8,013,735 B2
• Time in Patent Office: Days
• US Class Current: 340/988
• CPC Class Codes: G08G 1/205 Indicating the location of the monitored vehicles as destination, e.g. accidents, stolen, rental

Abstract

An asset location, tracking, and recovery system and method includes a network of VHF towers and a control center receiving signals from and transmitting signals to the VHF towers. Primary locating units each include a transmitter, a receiver, and a transponder activated when a signal is transmitted by the control center via the VHF towers to the receiver. Auxiliary locating units include at least a transmitter emitting a signal received by at least one primary locating unit receiver which relays that signal to the control center via the VHF towers from the primary locating unit transmitter.

Claims

1. An asset location, tracking, and recovery system comprising:

a network of VHF towers;

a control center receiving signals from and transmitting signals to the VHF towers;

a locating unit including a transmitter, a receiver, and a transponder activated when a signal is transmitted by the control center via the VHF towers to the receiver; and

at least one auxiliary locating unit including at least a transmitter emitting a signal received by the locating unit receiver and relayed to the control center via the VHF towers from the locating unit transmitter.

2. The system of claim 1 in which the locating unit further includes a position determination subsystem for transmitting via the locating unit transmitter the position of the vehicle locating unit to the control center via the VHF towers.

3. The system of claim 2 in which the position determination subsystem includes a global positioning system unit.

4. The system of claim 1 in which the control center includes a database of auxiliary locating units reported stolen, missing, lost, or in need of finding, downloaded to the locating unit which is configured to relay a received auxiliary locating unit signal to the control center only if said signal matches an auxiliary locating unit stored in the database.

5. The system of claim 1 in which the vehicle locating unit further includes a cellular transceiver operable to activate the transponder based on a signal received from a cellular network.

6. The system of claim 5 in which the locating unit is further configured to relay to the control center via the cellular transceiver and the cellular network a signal emitted by an auxiliary locating unit.

7. The system of claim 1 in which the auxiliary locating unit and the locating unit are installed in one vehicle.

8. The system of claim 7 in which the locating unit is configured to transmit a message to the control center when the auxiliary locating unit fails to emit a signal.

9. The system of claim 7 in which the auxiliary locating unit includes a receiver, the locating unit transmits a signal to the auxiliary locating unit receiver, and the auxiliary locating unit is configured to emit a signal if the locating unit fails to transmit its signal.

10. The system of claim 1 in which the auxiliary locating unit is installed in a first vehicle and the vehicle locating unit is installed in a different, second vehicle.

11. The system of claim 1 in which the auxiliary locating unit further includes a receiver for receiving signals from the locating unit transmitter and/or from the control center via the VHF tower network.

12. The system of claim 1 in which the auxiliary locating unit further includes a receiver and is configured to emit a signal only when a signal is received by the receiver.

13. The system of claim 1 in which the control center is configured to query the vehicle locating unit regarding whether it has received an auxiliary locating unit signal.

14. An asset recovery system comprising:

a communications network;

a control center receiving signals from and transmitting signals to the communications network;

a primary locating unit including a transmitter, a receiver, and a transponder activated when a signal is transmitted by the control center via the communications network to the receiver; and

an auxiliary locating unit including a transmitter emitting a signal received by the primary locating unit receiver and relayed to the control center via the communications network by the primary locating unit transmitter.

15. The system of claim 14 in which the communications network includes a plurality of VHF towers.

16. An asset recovery method comprising:

hiding a locating unit including a transmitter, a receiver, and a transponder in an asset;

communicating with the locating unit receiver to activate the transponder;

associating an auxiliary locating unit including at least a transmitter with the same asset, with a different asset, or with an object or person; and

upon receiving an auxiliary locating unit transmitter signal via the receiver of the locating unit, relaying information regarding said signal to a control center.

17. The method of claim 16 in which the locating unit further includes a position determination subsystem and the locating unit transmitter transmits the position of the vehicle locating unit to the control center via the VHF towers.

18. The method of claim 17 in which the position determination subsystem includes a Global Positioning System unit.

19. The method of claim 16 in which the control center includes a database of auxiliary locating units which are downloaded to the locating unit which is configured to relay a received auxiliary locating unit'"'"'s signal to the control center if said signal matches an auxiliary locating unit stored in the database.

20. The method of claim 16 in which the locating unit further includes a cellular transceiver operable to activate the transponder based on a signal received from a cellular network.

21. The method of claim 20 in which the locating unit is further configured to relay to the control center via the cellular transceiver and the cellular network a signal emitted by an auxiliary locating unit.

22. The method of claim 20 in which the auxiliary locating unit and the locating unit are installed in one vehicle.

23. The method of claim 22 in which the locating unit is configured to transmit a message to the control center when the auxiliary locating unit fails to emit a signal.

24. The method of claim 22 in which the auxiliary tracking unit includes a receiver, the locating unit transmits a signal to the auxiliary locating unit receiver and the auxiliary locating unit is configured to emit a signal if the locating unit fails to transmit its signal.

25. The method of claim 16 in which the auxiliary locating unit is installed in a first vehicle and the vehicle locating unit is installed in a different, second vehicle.

26. The method of claim 16 in which the auxiliary locating unit further includes a receiver for receiving signals from the vehicle locating unit transmitter and/or from the control center via the VHF tower network.

27. The method of claim 16 in which the auxiliary locating unit further includes a receiver and is configured to emit a signal when a signal is received by the receiver.

28. The method of claim 16 in which the control center queries the locating unit regarding whether it has received an auxiliary locating unit signal.

29. A recovery method comprising:

installing a primary locating unit including a transmitter, a receiver, and a transponder with a position determination subsystem for determining the position of the primary locating unit;

associating with an asset, an object, or a person an auxiliary locating unit including at least a transmitter emitting a signal; and

upon the primary locating unit receiving the signal emitted by the auxiliary locating unit, activating the transmitter of the primary locating unit to transmit a message indicating a detection of the auxiliary locating unit and the position of the primary locating unit.