Method for classifying vehicles passing a predetermined waypoint
First Claim
1. A method for classifying a vehicle passing a predetermined waypoint on a road, comprising the steps of:
- measuring, at a measuring frequency (F), successive measured distance values from a measuring location on a side of the road, along a fixed measuring line extending through the waypoint and across the road, to the undercarriage of the vehicle passing the waypoint;
measuring a speed (v) of the vehicle passing the waypoint;
determining a spatial distance (Δ
L), between adjacent measured distance values along a longitudinal axis of the vehicle, from said speed (v) and said measuring frequency (F);
creating a measurement profile for the undercarriage of the vehicle, with said measurement profile having a series of said successive measured distance values spaced at said spacial distance (Δ
L); and
comparing said measurement profile to reference data of known reference vehicles to classify the vehicle passing the predetermined waypoint.
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Abstract
A method for classifying vehicles passing a predetermined waypoint, for a refined classification within specific vehicle categories such as tracked or wheeled vehicle categories, where the distance to the vehicle passing the waypoint is continuously actively optically measured along a measuring line extending through the waypoint, from a fixed measuring location disposed transversely on the side of the road, and the speed of the vehicle passing the waypoint is additionally measured. The spatial distance between the measured values in the direction of the longitudinal axis of the vehicle is determined from the vehicle speed and the measuring frequency, and a measurement profile of the undercarriage of the vehicle is created by plotting the measured values spaced at the specific spatial distance in the direction of the longitudinal axis. The measurement profile is compared, either indirectly by the derivation of undercarriage parameters, such as number of axles, axle spacing and wheel diameter, or directly with known reference vehicles. The vehicle is classified as that reference vehicle for which the coincidence or correlation is the greatest.
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Citations
19 Claims
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1. A method for classifying a vehicle passing a predetermined waypoint on a road, comprising the steps of:
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measuring, at a measuring frequency (F), successive measured distance values from a measuring location on a side of the road, along a fixed measuring line extending through the waypoint and across the road, to the undercarriage of the vehicle passing the waypoint; measuring a speed (v) of the vehicle passing the waypoint; determining a spatial distance (Δ
L), between adjacent measured distance values along a longitudinal axis of the vehicle, from said speed (v) and said measuring frequency (F);creating a measurement profile for the undercarriage of the vehicle, with said measurement profile having a series of said successive measured distance values spaced at said spacial distance (Δ
L); andcomparing said measurement profile to reference data of known reference vehicles to classify the vehicle passing the predetermined waypoint. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification