Method of Verifiably Detecting the Speed of a Vehicle
First Claim
1. A method of measuring the speed of a vehicle comprisingdirecting a radar beam from a radar system at a road such that several vehicles at the same time can drive through the measuring range defined by the radar beam and so that part of the radar beam is reflected by a minimum of one vehicle;
- comparing the reflected beam portion to the radar beam directed at the road;
deriving from said comparison measured values for the speed and the distance from the radar system linked to the vehicles;
comparing the derived speeds to a maximum permissible speed;
activating a camera for creating an image if a derived speed is higher than the maximum permissible speed, with the derived speed and the vehicle for which the excessive speed was derived being contained on the image;
continuously deriving the measured values several times throughout the duration of the passage of the vehicles through the measuring range;
assessing the plausibility of previously measured values by means of subsequently derived measured values;
using the measured values of the distances to characterize the vehicle lanes of the reflecting vehicles relative to the distance from the radar system; and
marking the vehicle lane of the vehicle in the image, linked to the vehicle for which the excessive speed was derived.
2 Assignments
0 Petitions
Accused Products
Abstract
A method of measuring the speed of a vehicle wherein the speed and the distance of the vehicle from a radar system and/or the measuring angle of the vehicle relative to the radar axis is determined by means of a radar measurement so as to characterize or determine the vehicle lane of the vehicle by means of the distance and/or the measuring angle. Knowledge of the vehicle lane makes it possible to unequivocally identify the detected vehicle in a group of vehicles unequivocally.
52 Citations
13 Claims
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1. A method of measuring the speed of a vehicle comprising
directing a radar beam from a radar system at a road such that several vehicles at the same time can drive through the measuring range defined by the radar beam and so that part of the radar beam is reflected by a minimum of one vehicle; -
comparing the reflected beam portion to the radar beam directed at the road; deriving from said comparison measured values for the speed and the distance from the radar system linked to the vehicles; comparing the derived speeds to a maximum permissible speed; activating a camera for creating an image if a derived speed is higher than the maximum permissible speed, with the derived speed and the vehicle for which the excessive speed was derived being contained on the image; continuously deriving the measured values several times throughout the duration of the passage of the vehicles through the measuring range; assessing the plausibility of previously measured values by means of subsequently derived measured values; using the measured values of the distances to characterize the vehicle lanes of the reflecting vehicles relative to the distance from the radar system; and marking the vehicle lane of the vehicle in the image, linked to the vehicle for which the excessive speed was derived. - View Dependent Claims (2, 3, 4)
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5. A method of measuring the speed of a vehicle comprising
directing a radar beam from a radar system at a road such that several vehicles at the same time can drive through the measuring range defined by the radar beam and so that part of the radar beam is reflected by a minimum of one vehicle; -
comparing the reflected beam portion to the radar beam directed at the road; deriving from said comparison measured values for the speed linked to the vehicles; comparing the derived speeds to a maximum permissible speed; activating a camera for creating an image if a derived speed is higher than the maximum permissible speed, with the derived speed and the vehicle for which the excessive speed was derived being contained on the image; deriving measured values for measuring angles; continuously deriving the measured values several times throughout the duration of the passage of the vehicles through the measuring range; assessing the plausibility of previously measured values by means of subsequently derived measured values; using the measured values for the measuring angles to characterize the vehicle lanes of the reflecting vehicles relative to the main beam of the radar system; and marking the vehicle lane of the vehicle in the image, linked to the vehicle for which the excessive speed was derived. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13)
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Specification