METHOD FOR DETERMINING THE STATE OF A ROAD SURFACE AND METHOD OF GENERATING A LOG OVER THE USE OF A VEHICLE
First Claim
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1. A method for determining the state of a road surface on which a vehicle has traveled, providing a filtered first component from a retrieved signal, characterized by the steps ofa) retrieving the signal representative of the distance between a wheel axle and the vehicle body;
- b) providing, from the retrieved signal, the filtered first component, wherein the first component is representative of an axle resonance of a wheel axle of the vehicle, and exposing the signal to a first band pass filter with a first frequency band around the axle resonance of the wheel axle in order to obtain the first component;
c) calculating a first value representative of an excitation degree of the first component;
d) retrieving a signal representative of the velocity of the vehicle;
e) compensating the first velocity for the influence of the velocity such that a first velocity compensated valueis generated;
f) comparing the first velocity compensated value with stored data for classifying the state of the road on which the vehicle has traveled.
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Abstract
A method for determining the state of a road surface on which a vehicle has traveled includes the steps of: a) retrieving a signal representative of the distance between the wheel axle and the vehicle body; b) providing, from the retrieved signal, a band pass filtered first component; c) calculating a first value representative of an excitation degree of the first component.
13 Citations
23 Claims
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1. A method for determining the state of a road surface on which a vehicle has traveled, providing a filtered first component from a retrieved signal, characterized by the steps of
a) retrieving the signal representative of the distance between a wheel axle and the vehicle body; -
b) providing, from the retrieved signal, the filtered first component, wherein the first component is representative of an axle resonance of a wheel axle of the vehicle, and exposing the signal to a first band pass filter with a first frequency band around the axle resonance of the wheel axle in order to obtain the first component; c) calculating a first value representative of an excitation degree of the first component; d) retrieving a signal representative of the velocity of the vehicle; e) compensating the first velocity for the influence of the velocity such that a first velocity compensated value is generated; f) comparing the first velocity compensated value with stored data for classifying the state of the road on which the vehicle has traveled. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. (canceled)
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23. (canceled)
Specification