Multiple accelerometer apparatus for counting rotations of an object, and methods of use
US8352210B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 23, 2010 |
| Grant date | Jan 8, 2013 |
| Priority date | — |
| Expiry date | Jan 31, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C22/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system determines the revolutions of an object using multiple accelerometers. A difference vector between at least 2 multi-axis accelerometers spaced some distance apart is used to calculate the two-dimensional or three-dimensional centripetal acceleration vector. The centripetal acceleration vector is then used as a rough estimate for the sampling rate for a digital tracking bandpass filter. This bandpass filter extracts angular orientation data leading to a sampling rate and to a revolution totalizer. The number of revolutions of the object, along with a known diameter of an attached object, such as a vehicle wheel, may be used to calculate distance traveled by the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.