The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 11, 2005
Filed:
Dec. 18, 2003
Seshu Bhagavathula, Waldenbuch, DE;
Shanmukh Katragadda, Bangalore, IN;
Ravindra Peravali, Ulm, DE;
Juergen Trost, Grafenberg, DE;
Seshu Bhagavathula, Waldenbuch, DE;
Shanmukh Katragadda, Bangalore, IN;
Ravindra Peravali, Ulm, DE;
Juergen Trost, Grafenberg, DE;
DaimlerChrysler AG, Stuttgart, DE;
Abstract
In a method for determining the state of a road during driving of a motor vehicle, the sound which is generated when a vehicle tire rolls on an underlying surface is sensed. A frequency signal is determined by means of a sound level signal which describes the sound, and is divided into at least two sub-zones by means of at least one limiting frequency. The sub-zones are each assigned to an associated frequency band, and an intensity value is determined for each of at least two frequency bands from the assigned sub-zone of the frequency signal. The intensity value is characteristic of the sound intensity which is present in a frequency band. An intensity ratio is formed from two intensity values by dividing the first intensity value of the first frequency band by the second intensity value of the second frequency band, and is used to determine the state of a road.