Method and apparatus for detecting a road pavement surface condition
First Claim
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1. A method of detecting a road pavement surface condition comprising the steps of:
- (a) detecting a road noise created by a vehicle traveling along a road;
(b) determining a temporal frequency content of the road noise; and
(c) analyzing the temporal frequency content to determine the road pavement surface condition.
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Abstract
An apparatus for determining a road pavement surface condition over a wide area has a road noise sensor (12). A temporal frequency analyzer (18) converts a road noise signal from the road noise sensor (12) to a temporal frequency signal. A processing circuit (20) receives the temporal frequency signal from the temporal frequency analyzer (18) and analyzes the temporal frequency signal to determine the road pavement surface condition.
80 Citations
20 Claims
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1. A method of detecting a road pavement surface condition comprising the steps of:
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(a) detecting a road noise created by a vehicle traveling along a road; (b) determining a temporal frequency content of the road noise; and (c) analyzing the temporal frequency content to determine the road pavement surface condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus of determining a road pavement surface condition, comprising:
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a road noise sensor; a temporal frequency analyzer converting a road noise signal from the road noise sensor to a temporal frequency signal; and a processing circuit receiving the temporal frequency signal from the temporal frequency analyzer and analyzing the temporal frequency signal to determine the road pavement surface condition. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method for determining a state of a road pavement, comprising the steps of:
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(a) detecting, with a road noise sensor mounted on a moving vehicle, an energy emission from a tire impacting the road to form a detected signal; (b) converting the detected signal into a temporal spectral content; and (c) analyzing the temporal spectral content to determine the state of the road pavement. - View Dependent Claims (18, 19, 20)
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Specification