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US 12,715,445 B2Granted
Method and system for the recognition of the irregularities of a road pavement
OwnerAlessandro Boldrini, Lorenzo Alleva +2inventors
InventorsAlessandro Boldrini, Lorenzo Alleva, Alessandra Magliozzi, Vittorio Nicolosi
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Abstract
The invention concerns a method and a system for recognizing the presence of any irregularities of any road pavement.
Claims14
A method for recognition of irregularities of a road pavement, the method comprising:
- during a preliminary test stage:
- performing respective tests wherein pneumatic tires drive over and/or impact different irregularities at different speeds of a motor vehicle having a suspension system;
- acquiring a vertical acceleration during the respective tests;
- and
- construction, based on one or more results of the respective tests, of at least one first model for associating a standard deviation of the vertical acceleration in relation to the tests performed with the irregularities on the road pavement;
- and
- during an actual recognition stage:
- acquiring a vertical acceleration;
- implementing high-pass filtering of the vertical acceleration, wherein a minimum filtering threshold of the high-pass filter is less than or equal to 0.1 Hz, wherein the filtering is performed on a reference section of the road pavement of variable length having a length of between 2 and 25 linear meters;
- processing the vertical acceleration via a Fast Fourier Transform;
- calculating a standard deviation of the processed vertical acceleration via a Fast Fourier Transform at relevant frequencies comprising a first range of vibration frequencies of the motor vehicle suspension system;
- and
- recognizing a presence and dimensions of the irregularities on the road pavement based on a comparison between said first model and the standard deviation of the processed vertical acceleration via a Fast Fourier Transform at the relevant frequencies.
10 more elements
A system for recognition of irregularities of a road pavement, the system comprising:
- an acquisition device installed on board a motor vehicle provided with two or more wheels fitted with pneumatic tires, wherein the acquisition device is coupled to a vehicle bus of the motor vehicle and configured to
- acquire from the vehicle bus signals are indicative of vertical acceleration, and
- provide as outputs amplitudes that are indicative of the vertical acceleration;
- and
- a processing device configured to construct, based on outputs received from the acquisition device, at least one model for the recognition of irregularities of a road pavement, to store the at least one model for the recognition of the irregularities of a road pavement, and to receive from the acquisition device the amplitudes that are indicative of the vertical acceleration, wherein the processing device is further programmed to:
- implement high-pass filtering of the vertical acceleration, wherein a minimum filtering threshold of the high-pass filter is less than or equal to 0.1 Hz, wherein the filtering is performed on a reference section of the road pavement of variable length having a length of between 2 and 25 linear meters;
- process the high-pass filtered vertical acceleration via a Fast Fourier Transform;
- calculate a standard deviation of the processed and high-pass-filtered vertical acceleration at relevant frequencies, wherein the relevant frequencies comprise a first range of frequencies of vibration of a suspension system of the motor vehicle, wherein the first range of frequencies is between 1.5 Hz and 3 Hz;
- and
- recognize a presence and dimensions of the irregularities of a road pavement based upon a comparison between said stored at least one model and the standard deviation calculated at the relevant frequencies.
7 more elements
Dependencies are inferred from the claim text.