Automatic alignment of a vehicle three-axes accelerometer
US9128116B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 2013 |
| Grant date | Sep 8, 2015 |
| Priority date | — |
| Expiry date | Apr 4, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P15/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The axes of an accelerometer, installed in a vehicle at an arbitrary orientation, may be realigned to the coordinate frame of the vehicle. In one implementation, a method may include determining, based on acceleration measurements from the accelerometer that likely corresponds to stopping, a dominant orientation of the accelerometer in relation to gravity, including calculating a first transformation angle and a second transformation angle as parameters to perform coordinate realignment of a coordinate frame of the accelerometer to a coordinate frame of the vehicle. The method may further include identifying, based on the acceleration measurements, an occurrence of acceleration events of the vehicle; determining, based on an analysis of the acceleration events, a third transformation angle; and storing the first, second, and third transformation angles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.