Method and apparatus for detecting a road pavement surface condition
AssigneeJ Squared, Inc.
InventorsJames Shih-Tsih Chang, James Jay Fanning
Life of this patent
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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.
Claims20
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.
An apparatus of determining a road pavement surface condition, comprising:
- 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.
A method for determining a state of a road pavement, comprising the steps of:
- (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.
Dependencies are inferred from the claim text.