Reducing elevation error with environmental pressure anomaly compensation
US9322648B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 2015 |
| Grant date | Apr 26, 2016 |
| Priority date | — |
| Expiry date | May 15, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C5/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for determining an environmental pressure change affecting a pressure sensor within a portable device to determine an elevation of the portable device is disclosed. The method involves sampling pressure data from at least one stationary pressure sensor in an area surrounding a location of the device, wherein the stationary pressure sensor in not within the portable device. The sampled pressure data is then interpolated to a time interval and a difference is computed between the interpolated pressure data over each time interval to determine a differential pressure. The location of the stationary pressure sensor is determined and the differential pressure is added to a pressure map affecting data near the location. The environmental pressure change is then computed over any interval at the location and subtracted from a pressure measurement of the pressure sensor before computing an elevation of the portable device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.