Velocity bias compensation for swimmer position tracking
US10641905B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2018 |
| Grant date | May 5, 2020 |
| Priority date | — |
| Expiry date | Jan 5, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/52
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Techniques are provided for determining a moving body's position and velocity in the presence of motion of a measuring device relative to the body. For example, a swimmer's position and velocity may be determined by compensating for bias that may result from a swimmer's arm swing. This may help avoid over-estimating a swimmer's velocity that results in inaccurate position estimation along the swimmer's path. To compensate for the swimmer's arm swing, an estimate of translational velocity due to arm rotation may be removed, e.g., from pseudo-range rates (PRRs) from satellite positioning system measurements, to reduce the systematic bias errors. A scale factor is applied to an estimated velocity of the swimmer's body to estimate the velocity of a mobile device on the swimmer's wrist, e.g., while above water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.