Method, apparatus and computer program product for orienting a smartphone display and estimating direction of travel of a pedestrian
US9544740B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2013 |
| Grant date | Jan 10, 2017 |
| Priority date | — |
| Expiry date | Jan 18, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2354/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method, apparatus, and computer program product embodiments provide position determination. An example method embodiment comprises measuring in a mobile device, acceleration in mutually orthogonal x and y directions in a horizontal plane and in a vertical direction, due to walking motion of a user holding the device; computing a Fourier transform of the measured acceleration in the vertical direction and determining a frequency of acceleration in the vertical direction having a maximum amplitude; computing a Fourier transform of the measured acceleration in the x direction and in the y direction and determining a frequency of acceleration in the x and y directions corresponding to the maximum amplitude frequency of acceleration in the vertical direction; and computing a direction of walking motion of the user, based on the determined frequency of acceleration in the x and y directions corresponding to the maximum amplitude frequency of acceleration in the vertical direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.