Smoothness indicator
US7845878B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2007 |
| Grant date | Dec 7, 2010 |
| Priority date | — |
| Expiry date | Oct 6, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01C23/07
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A smoothness indicator for measuring a profile of a road surface includes two or more non-contact elevation distance sensors, such as ultrasonic sensors, laser sensors, or the like. The non-contact elevation distance sensors are arranged in pairs including a trailing non-contact elevation distance sensor and a leading non-contact elevation distance sensor disposed at a known distance from the trailing non-contact elevation distance sensor along the profile. A slope sensor for measuring an angle of incidence of the leading and trailing non-contact elevation distance sensors relative to a horizontal plane is also included. The smoothness indicator generates an elevation profile of the road surface by calculating an elevation for the second location using an elevation assigned to the first location and an elevation difference between the first location and the second location.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.