| 发明名称 | Reducing elevation error with environmental pressure anomaly compensation | ||
| 摘要 | 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. | ||
| 申请公布号 | US9322648(B1) | 申请公布日期 | 2016.04.26 |
| 申请号 | US201514714209 | 申请日期 | 2015.05.15 |
| 申请人 | TRX Systems, Inc. | 发明人 | Karvounis John;Napora Jared;Hakim Dan;Teolis Carole;Miller John Riley;Funk Benjamin E. |
| 分类号 | G01C5/06 | 主分类号 | G01C5/06 |
| 代理机构 | Baker & Hostetler LLP | 代理人 | Baker & Hostetler LLP |
| 主权项 | 1. A computer-implemented method for determining an environmental pressure change affecting a pressure sensor within a portable device to determine an elevation of the mobile device, comprising: sampling pressure data from at least one stationary pressure sensor in an area surrounding a location of the device, wherein the at least one stationary pressure sensor is not within the portable device; interpolating the sampled pressure data to a time interval; computing a difference between the interpolated pressure data over each time interval to determine a differential pressure; determining a location of the at least one stationary pressure sensor; adding the differential pressure to a pressure map affecting data near the location, wherein the pressure map is segmented into a plurality of tiles; computing the environmental pressure change over any interval at the location; and subtracting the environmental pressure change from a pressure measurement of the pressure sensor to determine a corrected pressure measurement before computing an elevation of the portable device. | ||
| 地址 | Greenbelt MD US | ||