Systems and methods for estimating vehicle speed and hence driving behavior using accelerometer data during periods of intermittent GPS
US9395384B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2015 |
| Grant date | Jul 19, 2016 |
| Priority date | — |
| Expiry date | Oct 7, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W4/027
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system estimates the speed of a moving vehicle and hence the driving behavior of an individual driving the vehicle using accelerometer data when GPS is intermittent, unavailable, or inaccurate. To do so, the system may first determine time periods when GPS data is not available. For each time period, the system may analyze the accelerometer data to find idling points when the vehicle is not moving. Based on the idling points, the system may divide each time period into segments. The system may then determine the speed of the vehicle at the boundary points of each segment. For each segment, the system may analyze the accelerometer data to determine the acceleration of the vehicle for points when the vehicle is moving. Subsequently, the system may calculate the speed of the vehicle for the points when the vehicle is moving based on the acceleration of the vehicle at those points and the speed of the vehicle at the boundary points.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.