System and method for determining a position of a vehicle
First Claim
1. A method for determining the position of a vehicle, the method comprising:
- transmitting a transmission signal from a mobile transmitter at a vehicle to beacons associated with the work area;
determining elapsed times for corresponding propagation paths between the vehicle and the beacons, each propagation path including at least one of a first propagation duration and a second propagation duration;
the first propagation duration referring to a propagation time of the transmission signal from the vehicle to the particular beacon;
the second propagation duration referring to a propagation time of a return signal from the particular beacon to the vehicle;
compensating for noise or measurement error associated with a corresponding propagation path by invoking an averaging scheme, the averaging scheme determining an elapsed time for a corresponding propagation path based on an average of the first propagation duration and the second propagation duration; and
estimating a position of a vehicle at a confluence or intersection of position curves or temporal curves based on elapsed times for the propagation paths.
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Accused Products
Abstract
A method and system for determining the position of a vehicle comprises a transmitter or transceiver for transmitting a transmission signal from a vehicle to beacons associated with the work area. Each beacon is associated with a corresponding transceiver or receiver for receiving the transmission signal. A data processor at a beacon, the vehicle or both determines an elapsed time including at least one of a first propagation duration and a second propagation duration. The first propagation duration refers to a propagation time of the transmission signal from the vehicle to the particular beacon; the second propagation duration refers to a propagation time of a return signal from the particular beacon to the vehicle. A compensator compensates for one or more of the following associated with at least one of the transmitter and the particular beacon: bias delay, noise, and measurement error. A data processor processes the elapsed times (for paths between vehicles and beacons) into corresponding position curves or temporal curves to estimate a position of a vehicle at a confluence or intersection of the position curves or temporal curves.
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Citations
22 Claims
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1. A method for determining the position of a vehicle, the method comprising:
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transmitting a transmission signal from a mobile transmitter at a vehicle to beacons associated with the work area;
determining elapsed times for corresponding propagation paths between the vehicle and the beacons, each propagation path including at least one of a first propagation duration and a second propagation duration;
the first propagation duration referring to a propagation time of the transmission signal from the vehicle to the particular beacon;
the second propagation duration referring to a propagation time of a return signal from the particular beacon to the vehicle;
compensating for noise or measurement error associated with a corresponding propagation path by invoking an averaging scheme, the averaging scheme determining an elapsed time for a corresponding propagation path based on an average of the first propagation duration and the second propagation duration; and
estimating a position of a vehicle at a confluence or intersection of position curves or temporal curves based on elapsed times for the propagation paths. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for determining the position of a vehicle, the system comprising:
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a mobile transmitter for transmitting a transmission signal at a vehicle to beacons associated with the work area;
an estimator for determining elapsed times for corresponding propagation paths between the vehicle and the beacons, each propagation path including at least one of a first propagation duration and a second propagation duration;
the first propagation duration referring to a propagation time of the transmission signal from the vehicle to the particular beacon;
the second propagation duration referring to a propagation time of a return signal from the particular beacon to the vehicle;
a compensator for compensating for noise or measurement error associated with a corresponding propagation path by invoking an averaging scheme, the averaging scheme determining an elapsed time for a corresponding propagation path based on an average of the first propagation duration and the second propagation duration; and
a data processor for estimating a position of a vehicle at a confluence or intersection of position curves or temporal curves based on elapsed times for the propagation paths. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification