Radius of curvature detecting apparatus and the method thereof
US6138084A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 10, 1998 |
| Grant date | Oct 24, 2000 |
| Priority date | — |
| Expiry date | Jun 10, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W40/072
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A radius of curvature detecting apparatus and method of a vehicle for detecting a radius of curvature of a curve based on road information obtained from a vehicle navigation system comprises, three-points detection of a first point, a second point and a third point in order of traveling direction of the vehicle from point data showing a road configuration which are provided by the vehicle navigation system, distance comparison of a distance of a straight line connecting the first point and the second point with a distance of a straight line connecting the second point and the third point and for determining a short straight line and a long straight line, respectively, mid-point calculation for finding a mid-point point located at a half distance of the short straight line from the second point, equivalent mid-point calculation for finding an equivalent mid-point located at the half distance from the second point on the long straight line, and radius of curvature calculation for determining a point of intersection of perpendicular lines from the mid-point point and the equivalent mid-point as a center of the curve and for calculating a radius of curvature based on the center of the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.