Method for determining state of road surface
US12157474B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 27, 2022 |
| Grant date | Dec 3, 2024 |
| Priority date | — |
| Expiry date | Jul 25, 2043 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W2556/45
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A determining method for determining a state of a road surface includes: sequentially acquiring a rotational speed of tires mounted on the vehicle, sequentially acquiring a driving force of the vehicle, calculating a slip ratio based on the sequentially acquired rotational speed of the tires, calculating a regression equation and a confidence interval width for a relationship between the slip ratio and the driving force, based on data sets of the slip ratio and the driving force in a predetermined zone, and determining a state of the road surface on which the vehicle travels, based on the confidence interval width calculated for the predetermined zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.