Method for determining a state of a road during the driving mode of a motor vehicle
First Claim
1. A method for determining the state of a road during driving of a motor vehicle, comprising:
- sensing at least a portion of a sound generated when a vehicle tire rolls on an underlying road surface being sensed;
generating a sound level signal which describes said sound, using said at least a portion; and
determining a frequency signal which characterizes the sound level signal;
wherein the frequency signal is divided, by means of at least one limiting frequency, into at least two sub-zones which are each assigned to an associated frequency band;
an intensity value is determined for each of at least two frequency bands from the assigned sub-zone of the frequency signal, said intensity value being characteristic of the sound intensity present in a frequency band;
an intensity ratio is formed by dividing a first intensity value of a first frequency band by a second intensity value of a second frequency band; and
the intensity ratio is used to determine the state of the road.
5 Assignments
0 Petitions
Accused Products
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.
-
Citations
10 Claims
-
1. A method for determining the state of a road during driving of a motor vehicle, comprising:
-
sensing at least a portion of a sound generated when a vehicle tire rolls on an underlying road surface being sensed;
generating a sound level signal which describes said sound, using said at least a portion; and
determining a frequency signal which characterizes the sound level signal;
whereinthe frequency signal is divided, by means of at least one limiting frequency, into at least two sub-zones which are each assigned to an associated frequency band;
an intensity value is determined for each of at least two frequency bands from the assigned sub-zone of the frequency signal, said intensity value being characteristic of the sound intensity present in a frequency band;
an intensity ratio is formed by dividing a first intensity value of a first frequency band by a second intensity value of a second frequency band; and
the intensity ratio is used to determine the state of the road. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification