Tracking system and method

• US 20030210143A1
• Filed: 03/13/2003
• Published: 11/13/2003
• Est. Priority Date: 03/13/2002
• Status: Active Grant

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Haddad, Wassim
• Granted Patent: US 6,934,625 B2
• Time in Patent Office: Days
• US Class Current: 340/539.13
• CPC Class Codes: G08G 1/20 Monitoring the location of vehicles belonging to a group, e.g. fleet of vehicles, countable or determined number of vehicles

Abstract

A tracking system comprises an arming unit, a motion sensor, a direction sensor, a processor, and a transceiver. The arming unit is switchable so as to place the tracking system in either an armed state or an unarmed state. The motion sensor is arranged to activate the tracking system when the system is in an armed state and motion is detected. The direction sensor and the motion sensor output signals indicative of the direction of travel and distance travelled, respectively, to the processor when the system is activated. The processor acts upon said signals so as to generate an output indicative of the distance and direction of travel. The transceiver actuable to transmit the output of the processor to a remote base station in order that the position of a tracked object can be monitored remotely.

Claims

1. A tracking system, which is adapted to track an object independently of the processing of directionally dependent broadcast signals, comprising an arming unit, a motion detection device, a direction detection device, processing circuitry, a transmitter and an activation device;

the arming unit being switchable so as to place the tracking system in either an armed state or an unarmed state, the activation device being arranged to activate the tracking system when the system is in an armed state, the direction detection device and the motion detection device being arranged to output signals indicative of the direction of travel and distance travelled, respectively, to the processing circuitry when the system is activated, the processing circuitry being arranged to act upon said signals so as to generate an output indicative of the distance and direction of travel, the transmitter being actuable to transmit the output of the processing circuitry to a remote receiving station.

2. A system according to claim 1 arranged to track the object independently of measuring signal strengths of each of a plurality of substantially simultaneously broadcast signals.

3. A system according to claim 1 wherein the transmitter is arranged to transmit data as any one of:

a burst of a single distance/direction pair, a plurality of distance/direction pairs or a continual feed of distance/direction pairs.

4. A system according to claim 1 wherein the transmitter is arranged to transmit a signal to the base station that is indicative of the overall distance travelled and the net direction of travel since the activation of the tracking system.

5. A system according to claim 1 wherein the transmitter is arranged to receive a signal from a waymarker.

6. A system according to claim 5 wherein the waymarker'"'"'s signal contains details of its geographical location.

7. A system according to claim 6 wherein the transmitter is arranged to transmit the details of the waymarker'"'"'s geographical location to the remote receiving station.

8. A system according to claim 1 wherein the activation device is any one, or combination of, the following:

the motion detection device, the direction detection device, an engine monitoring device, a vibration sensing device, a device engine emission sensing means, a braking monitoring device.

9. A system according to claim 1 housed in a motor vehicle and arranged to track the motor vehicle when activated.

10. A method of tracking an object, independently of measuring signal strength of directionally dependent broadcast signals, comprising the steps of:

(i) activating a tracking system;

(ii) measuring the direction and distance of travel; and

(iii) transmitting the direction and distance of travel to a remote receiving station.

11. The method of claim 10 including estimating the objects current location from its last known position and the aggregate direction and distance of travel.

12. The method of claim 10 including activating the tracking arrangement by a signal from a motion detection device or other object use detection device.

13. The method of claim 10 including transmitting a burst of direction and distance information relating to the period since the last transmission.

14. The method of claim 10 including receiving a signal from a waymarker by the tracking system, containing within the signal details of the waymarker'"'"'s geographical location

15. The method of claim 14 including transmitting details of the waymarker'"'"'s geographical location to the remote receiving station.

16. The method of claim 14 including providing a distance meter in the system and resetting the distance meter upon receiving a signal from a waymarker.

17. A motor vehicle including a tracking system which is adapted to track an object independently of the processing of directionally dependent broadcast signals, comprising an arming unit, a motion detection device, a direction detection device, processing circuitry, a transmitter and an activation device;

the arming unit being switchable so as to place the tracking system in either an armed state or an unarmed state, the activation device being arranged to activate the tracking system when the system is in an armed state, the direction detection device and the motion detection device being arranged to output signals indicative of the direction of travel and distance travelled, respectively, to the processing circuitry when the system is activated, the processing circuitry being arranged to act upon said signals so as to generate an output indicative of the distance and direction of travel, the transmitter being actuable to transmit the output of the processing circuitry to a remote receiving station.

18. A tracking system for tracking an object an object comprising an arming unit, a motion detection device, a direction detection device, processing circuitry, a transmitter and an activation device;

the arming unit being switchable so as to place the tracking system in either an armed state or an unarmed state, the activation device being arranged to activate the tracking system when the system is in an armed state, the direction detection device and the motion detection device being arranged to output signals indicative of the direction of travel and distance travelled, respectively, to the processing circuitry when the system is activated, the processing circuitry being arranged to act upon said signals so as to generate an output indicative of the distance and direction of travel, the transmitter being actuable to transmit the output of the processing circuitry to a remote receiving station, the processing circuitry not being adapted to perform either of signal strength measurements or direction of signal determinations upon signals received from each of a plurality of transmitters in order to triangulate the position of the object.

19. A tracking system, which tracks an object independently of the processing of directionally dependent broadcast signals, comprising an arming unit, an accelerometer, a compass, processing circuitry, and a cellular transceiver;

the arming unit being switchable so as to place the tracking system in either an armed state or an unarmed state, the accelerometer being arranged to activate the tracking system when the system is in an armed state, the compass and the accelerometer being arranged to output signals indicative of the direction of travel and distance travelled, respectively, to the processing circuitry when the system is activated, the processing circuitry being arranged to act upon said signals so as to generate an output indicative of the distance and direction of travel, the cellular transceiver being actuable to transmit the output of the processing circuitry to a remote receiving station.