SYSTEM AND METHOD FOR ESTIMATING AND DETECTING SPEED
First Claim
1. A system for determining instances when a vehicle'"'"'s indicated speed exceeds a governing speed, comprising:
- a receiver to receive information from which a vehicle'"'"'s location envelope, indicated direction of travel, and indicated speed can be derived;
a processor configured to;
ascertain a location envelope in which the vehicle is located, an indicated speed of the vehicle, and a direction of travel of the vehicle at a sample time;
select the governing speed for the vehicle at the sample time, comprising;
ascertain possible route segments comprising at least a portion within the location envelope,eliminate route segments comprising a route segment direction of travel inconsistent with the indicated direction of travel,select as the governing speed a speed associated with a remaining route segment; and
determine if the indicated speed exceeds the governing speed.
2 Assignments
0 Petitions
Accused Products
Abstract
A system for determining instances when a vehicle'"'"'s indicated speed exceeds a governing speed includes a receiver to receive information from which a vehicle'"'"'s location envelope, indicated direction of travel, and indicated speed can be derived, and a processor. The processer is configured to ascertain a location envelope in which the vehicle is located, an indicated speed of the vehicle, and a direction of travel of the vehicle at a sample time. It is also configured to select the governing speed for the vehicle at the sample time, which includes ascertaining possible road segments with at least a portion within the location envelope, eliminating road segments with a road segment direction of travel inconsistent with the indicated direction of travel, and selecting as the governing speed a speed associated with a remaining road segment. The processor will then determine if the indicated speed exceeds the governing speed.
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Citations
40 Claims
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1. A system for determining instances when a vehicle'"'"'s indicated speed exceeds a governing speed, comprising:
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a receiver to receive information from which a vehicle'"'"'s location envelope, indicated direction of travel, and indicated speed can be derived; a processor configured to; ascertain a location envelope in which the vehicle is located, an indicated speed of the vehicle, and a direction of travel of the vehicle at a sample time; select the governing speed for the vehicle at the sample time, comprising; ascertain possible route segments comprising at least a portion within the location envelope, eliminate route segments comprising a route segment direction of travel inconsistent with the indicated direction of travel, select as the governing speed a speed associated with a remaining route segment; and determine if the indicated speed exceeds the governing speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A computer readable medium comprising program instructions for execution on a computer system, which when executed by a computer, cause the computer system to determine when a vehicle'"'"'s indicated speed exceeds a governing speed, comprising:
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ascertaining a location envelope, an indicated speed of the vehicle, and an indicated direction of travel of the vehicle at a sample time using geodetic data; selecting a governing speed for vehicle at the sample time, comprising; and ascertaining possible route segments comprising at least a portion within the location envelope, eliminating route segments comprising a direction of travel inconsistent with the indicated direction of travel, selecting as the governing speed a speed associated with a remaining route segment; determining if a value of the indicated speed is greater than the value of the governing speed. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A method for determining when a vehicle'"'"'s indicated speed exceeds a governing speed, the method comprising:
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ascertaining a location envelope, an indicated speed of the vehicle, and an indicated direction of travel of the vehicle at a sample time using geodetic data; selecting a governing speed for the vehicle at the sample time, comprising; and ascertaining possible route segments comprising at least a portion within the location envelope, eliminating route segments comprising a direction of travel inconsistent with the indicated direction of travel, selecting as the governing speed a speed associated with a remaining read route segment; determining if a value of the indicated speed is greater than the value of the governing speed. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification