Portable self-contained tracking unit and GPS tracking system

• US 6,339,397 B1
• Filed: 06/01/2000
• Issued: 01/15/2002
• Est. Priority Date: 06/01/2000
• Status: Expired due to Fees

• Current Assignee: Lat-Lon LLC (GeoTab Incorporated)
• Original Assignee: Lat-Lon LLC (GeoTab Incorporated)
• Inventors: Baker, David A.
• Primary Examiner(s): Issing, Gregory C.
• Application Number:
  US09/585,873
• Time in Patent Office: 593 Days
• Field of Search: 342/357.07, 342/357.09, 342/357.1, 342/357.06, 343/872, 343/878, 343/879
• US Class Current: 342/357.64
• CPC Class Codes: B61L 2205/04 Satellite based navigation systems, e.g. global positioning system [GPS]
• CPC Class Codes: B61L 25/021 Measuring and recording of train speed
• CPC Class Codes: B61L 25/023 Determination of driving direction of vehicle or train
• CPC Class Codes: B61L 25/025 Absolute localisation, e.g. providing geodetic coordinates
• CPC Class Codes: G01S 19/34 Power consumption
• CPC Class Codes: G01S 19/35 Constructional details or hardware or software details of the signal processing chain
• CPC Class Codes: G01S 5/0027 of actual mobile position, i.e. position determined on mobile
• 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
• CPC Class Codes: H01Q 1/22 by structural association with other equipment or articles
• CPC Class Codes: H01Q 1/3233 particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
• CPC Class Codes: H01Q 1/42 Housings not intimately mechanically associated with radiating elements, e.g. radome

Abstract

A portable self-contained tracking unit includes an enclosure attached to a mounting plate, with a hollow interior cavity housing a GPS receiver, a microprocessor and a transmitter. The GPS receiver will receive tracking data and the microprocessor will process the tracking data into a data packet. The transmitter transmits the data packet to a remote receiving station, for transmission to a central database. Photoelectric cells are mounted on the enclosure to recharge batteries which provide power to the electrical components of the tracking unit. The enclosure is designed with a pair of vertically oriented side panels which are generally orthogonally oriented so that the solar panels mounted on the side panels will maintain a favorable solar incidence angle during a wide range of orientations. The transmitter is a cellular telephone with an antenna mounted within the enclosure but spaced a distance from the metal mounting plate and electrical components approximately one-quarter wavelength of the operating frequency of the transmitter. The enclosure is formed of a radio frequency and optically transparent material, so that the antenna and the solar panels may be housed within the hollow interior cavity of the enclosure. In the method of the invention, tracking data is periodically transmitted via cellular phone to a cellular service provider, thence to a data service bureau which sends the data over the Internet to the database of a central server computer. The central server computer will decode the information and provide an interface and value added products such as maps and reports for customers via a web page on the Internet.

Claims

1. A tracking unit, comprising:

a generally planar mounting plate having upper and lower edges, opposing side edges, and forward and rearward faces;

an enclosure connected to the mounting plate forward face forming a hollow interior cavity, the enclosure formed of a radio-frequency-transparent material;

said enclosure including a pair of side panels connected together along a first side edge and oriented at an angle to one another for form a vertically-oriented ridge, each side panel having a second side edge connected to opposing side edges of the mounting plate, said ridge oriented parallel to the mounting plate;

said side panels being generally planar, and oriented at an angle to one another generally in the range of 80°

-100°

;

a GPS receiver mounted within the hollow cavity, operable to receive tracking data from CPS;

a microprocessor mounted within the hollow cavity, connected to the GPS receiver and operable to receive tracking data from the GPS receiver and process the tracking data into a data packet;

a transmitter within the hollow cavity, connected to the microprocessor and operable to transmit a data packet from the microprocessor to a remote receiving station;

a solar panel of photoelectric cells mounted on the enclosure for converting solar radiation into an electrical current, said solar panel electrically connected to at least a first rechargeable battery, which is connected to the receiver, microprocessor and transmitter, to provide electrical current thereto; and

a second solar panel of photoelectric cells mounted on the enclosure and electrically connected to at least a second rechargeable battery, which is electrically connected to the receiver, microprocessor and transmitter, to provide electrical current thereto, said first solar panel mounted on and in a plane parallel to one of said side panels and the second solar panel mounted on and in a plane parallel to the other side panel.

2. The tracking unit of claim 1, wherein said solar panels and their associated batteries are operable independent of each other, to provide electrical current regardless of the operation of the other panel and battery.

3. The tracking unit of claim 1, wherein said solar panels are mounted within the hollow cavity to an interior face of the side panels, and wherein the side panels have portions juxtaposed over the solar panel which are optically transparent.

4. A tracking unit, comprising:

a generally planar mounting plate having upper and lower edges, opposing side edges, and forward and rearward faces;

an enclosure connected to the mounting plate forward face forming a hollow interior cavity, the enclosure formed of a radio-frequency-transparent material;

said enclosure including a pair of side panels connected together along a first side edge and oriented at an angle to one another for form a vertically-oriented ridge, each side panel having a second side edge connected to opposing side edges of the mounting plate, said ridge oriented parallel to the mounting plate;

a GPS receiver mounted within the hollow cavity, operable to receive tracking data from CPS;

a microprocessor mounted within the hollow cavity, connected to the GPS receiver and operable to receive tracking data from the GPS receiver and process the tracking data into a data packet;

a transmitter within the hollow cavity, connected to the microprocessor and operable to transmit a data packet from the microprocessor to a remote receiving station;

said transmitter including an antenna of predetermined length, said antenna mounted in a valley formed between the side panels within the hollow cavity diametric to the ridge and spaced a distance from the mounting plate a distance about one-half the length of the antenna; and

a solar panel of photoelectric cells mounted on the enclosure for converting solar radiation into an electrical current, said solar panel electrically connected to at least a first rechargeable battery, which is connected to the receiver, microprocessor and transmitter, to provide electrical current thereto.

5. The tracking unit of claim 4, wherein said transmitter is a cellular telephone having a predetermined operating wavelength, and wherein the antenna has a length of about one-half wavelength.

6. In combination:

a cargo shipment within a container having at least one generally vertical sidewall;

a generally planar mounting plate mounted on the container side wall and oriented in a plane parallel thereto, said mounting plate having upper and lower edges, opposing side edges, and forward and rearward faces;

an enclosure connected to the mounting plate forward face and forming a hollow interior cavity, the enclosure formed of a radio-frequency-transparent material;

said enclosure including a pair of side panels connected together along a first side edge and oriented at an angle to one another to form a vertically-oriented ridge, each side panel having a second side edge connected to opposing side edges of the mounting plate, said ridge oriented parallel to the mounting plate;

a GPS receiver mounted within the hollow cavity, operable to receive tracking data from GPS;

a microprocessor mounted within the hollow cavity, connected to the GPS receiver and operable to receive tracking data from the GPS receiver and process the tracking data into a data packet;

a transmitter within the hollow cavity, connected to the microprocessor and operable to transmit a data packet from the microprocessor to a remote receiving station;

a solar panel of photoelectric cells mounted on the enclosure for converting solar radiation into an electrical current, said solar panel electrically connected to at least one rechargeable battery, which is electrically connected to the receiver, microprocessor and transmitter, to provide electrical current thereto; and

a second solar panel of photoelectric cells mounted on the enclosure and electrically connected to at least a second rechargeable battery, which is electrically connected to the receiver microprocessor and transmitter, to provide electrical current thereto, said first solar panel mounted on and in a plane parallel to one of said side panels and the second solar panel mounted on and in a plane parallel to the other side panel.

7. The combination of claim 6, wherein said solar panels and their associated batteries are operable independent of each other, to provide electrical current regardless of the operation of the other panel and battery.

8. In combination:

a cargo shipment within a container having at least one generally vertical sidewall;

a generally planar mounting plate mounted on the container side wall and oriented in a plane parallel thereto, said mounting plate having upper and lower edges, opposing side edges, and forward and rearward faces;

an enclosure connected to the mounting plate forward face and forming a hollow interior cavity, the enclosure formed of a radio-frequency-transparent material;

said enclosure including a pair of side panels connected together along a first side edge and oriented at an angle to one another to form a vertically-oriented ridge, each side panel having a second side edge connected to opposing side edges of the mounting plate, said ridge oriented parallel to the mounting plate;

a GPS receiver mounted within the hollow cavity, operable to receive tracking data from GPS;

a microprocessor mounted within the hollow cavity, connected to the GPS receiver and operable to receive tracking data from the GPS receiver and process the tracking data into a data packet;

a transmitter within the hollow cavity, connected to the microprocessor and operable to transmit a data packet from the microprocessor to a remote receiving station;

said transmitter including an antenna of predetermined length, said antenna mounted in a valley formed between the side panels within the hollow cavity diametric to the ridge and spaced a distance from the mounting plate a distance about one-half the length of the antenna;

a solar panel of photoelectric cells mounted on the enclosure for converting solar radiation into an electrical current, said solar panel electrically connected to at least one rechargeable battery, which is electrically connected to the receiver, microprocessor and transmitter, to provide electrical current thereto.

9. The tracking unit of claim 8, wherein said transmitter is a cellular telephone having a predetermined operating wavelength, and wherein the antenna has a length of about one-half wavelength.