Method and system for determining the location of a vehicle
First Claim
1. A system for accurately determining a location of a vehicle, the system comprising:
- a first location determining receiver for determining a first location estimate of a vehicle, the first location estimate based on a first location determining receiver associated with satellite beacons;
a second location determining receiver for determining a second location estimate of a vehicle, the second location estimate based on a second location determining receiver exclusiveiy associated with terrestrial beacons;
a selector for selecting initially the first location estimate, associated with the satellite beacons, as a preferential location in accordance with an initialization scheme for the vehicle in a work area;
a filtering module for applying a first weight to the first location estimate and a second weight to the second location estimate to derive a weighted estimate as the preferential location upon satisfactory completion of the initialization scheme;
a focused acquisition manager associated with at least one of the first location determining receiver and the second location determining receiver for limiting a tracking loop of location measurement data; and
a feedback manager for providing measurement predictions and variances from the filtering module to the focused acquisition manager.
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Accused Products
Abstract
A first location determining receiver determines a first location estimate of a vehicle. The first location determining receiver is associated with satellite beacons. A second location determining receiver determines a second location estimate of a vehicle. The second location determining receiver is exclusively associated with terrestrial beacons. A selector selects the first location estimate of the vehicle as a preferential location in accordance with an initialization scheme for the vehicle in a work area. A filtering module applies a first weight to a first location and a second weight to the second location to derive a weighted estimate as the preferential location upon satisfactory completion of the initialization scheme.
112 Citations
11 Claims
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1. A system for accurately determining a location of a vehicle, the system comprising:
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a first location determining receiver for determining a first location estimate of a vehicle, the first location estimate based on a first location determining receiver associated with satellite beacons; a second location determining receiver for determining a second location estimate of a vehicle, the second location estimate based on a second location determining receiver exclusiveiy associated with terrestrial beacons; a selector for selecting initially the first location estimate, associated with the satellite beacons, as a preferential location in accordance with an initialization scheme for the vehicle in a work area; a filtering module for applying a first weight to the first location estimate and a second weight to the second location estimate to derive a weighted estimate as the preferential location upon satisfactory completion of the initialization scheme; a focused acquisition manager associated with at least one of the first location determining receiver and the second location determining receiver for limiting a tracking loop of location measurement data; and a feedback manager for providing measurement predictions and variances from the filtering module to the focused acquisition manager. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for accurately determining a location of a vehicle, the method comprising:
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determining a first location estimate of a vehicle, the first location estimate based on a first location determining receiver exclusively associated with satellite beacons; determining a second location estimate of a vehicle, the second location estimate based on a second location determining receiver exclusively associated with terrestrial beacons; applying a first weight to the first location estimate and a second weight to the second location estimate; adjusting a transition from the first location estimate as a dominant estimate in the weighted estimated and the second location estimate as the dominant estimate in the weighted estimate by limiting a rate of change in the first weight and the second weight; and communicating the dominant estimate to at least one of a steering system, a braking system, and a propulsion system of the vehicle. - View Dependent Claims (10)
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11. A system for accurately determining a location of a vehicle, the system comprising:
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a first location determining receiver, coupled to a filtering module, for determining a first location estimate of a vehicle, the first location estimate based on the first location determining receiver exclusively associated with satellite beacons; a second location determining receiver, coupled to the filtering module, for determining a second location estimate of a vehicle, the second location estimate based on the second location determining receiver exclusively associated with terrestrial beacons; the filtering module applying a first weight to the first location estimate and a second weight to the second location estimate, providing a transition of a dominant estimate from one of the weighted first location estimate and the weighted second location estimate by limiting a rate of change in the first weight and the second weight, and communicating the dominant estimate to at least one of a steering system, a braking system, and a propulsion system of the vehicle.
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Specification