System and method for determining freight container locations
First Claim
1. A system for determining locations in a building comprising:
- two or more pseudolites located proximate to the building, operable for receiving a global positioning satellite system signal, and operable for transmitting positioning signals within the building;
one or more remote receivers positionable within the building for receiving said positioning signals from a pseudolite;
a base station;
each remote receiver including a transmitter for communicating positioning data between said remote receiver and said base station; and
the base station including a receiver for receiving positioning data from a remote receiver and a display for displaying the location of said remote receiver in said building.
2 Assignments
0 Petitions
Accused Products
Abstract
A system and method for determining the locations of freight containers in a freight yard is described. A remote unit that includes a GPS receiver is attached to the freight containers. The remote receivers have an independent power supply—a battery. Intermittently, either by a timer or by a motion detector, the remote receivers are operated. During operation, the remote receivers receive signals from the global positioning satellite system and at an allotted time, transmit the GPS data to a base station before shutting down to conserve power. The base station processes the GPS data to determine a position in the freight yard of each freight container. When a particular freight container or contents is desired, a data base in the base station can be consulted and the contents and location of a particular freight container located. The freight yard is typically outside with a view of the GPS constellation, such as a rail yard, airport baggage area, ship yard, truck park, etc. An alternative is described for use where the freight yard is a warehouse and the satellite view is obstructed. The alternative uses psuedolites or repeaters to track freight containers within the warehouse.
33 Citations
15 Claims
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1. A system for determining locations in a building comprising:
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two or more pseudolites located proximate to the building, operable for receiving a global positioning satellite system signal, and operable for transmitting positioning signals within the building;
one or more remote receivers positionable within the building for receiving said positioning signals from a pseudolite;
a base station;
each remote receiver including a transmitter for communicating positioning data between said remote receiver and said base station; and
the base station including a receiver for receiving positioning data from a remote receiver and a display for displaying the location of said remote receiver in said building. - View Dependent Claims (2)
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3. A system for determining locations of objects in a building comprising:
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one or more pseudolites located in or near the building which operate to transmit GPS positioning signals within the building;
one or more remote receivers accompanying said objects within the building for receiving the GPS positioning signals from the one or more pseudolites and each receiver operable for formulating positioning data indicative of receiver location within the building using said GPS positioning signals;
a base station having a receiver for receiving said positioning data from a remote receiver; and
a display for indicating the location of the remote receiver in said building. - View Dependent Claims (4, 5, 6, 7)
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8. A method of determining locations within a building comprising the steps of:
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providing one or more remote receivers which receive GPS signals within the building;
transmitting a GPS signal within the building;
receiving said GPS signals at said remote receiver and formulating positioning data indicative of receiver location within the building;
transmitting said positioning data from said receiver to a base station; and
displaying the location within the building of the remote receiver using said positioning data. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification