Method and system for real-time positioning of smart device, and method for determining the motion gesture of mobile phone
US10641608B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2016 |
| Grant date | May 5, 2020 |
| Priority date | — |
| Expiry date | Aug 29, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P15/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention discloses a method for real-time positioning of a smart device, comprising: getting tri-axial acceleration sequences truncated in turn by using a preset time period in the world coordinate individually; acquiring a dominate frequency fstep by applying fast Fourier transform (FFT) on the truncated Z-axis acceleration sequence, using a band-pass filter with a pass band [fstep−0.5 Hz, fstep+0.5 Hz] to filter the truncated tri axial acceleration sequences individually; comparing the time domain waveform form from the filtered Z-axis acceleration sequence with a preset step threshold, and counting each peak above the threshold as a step to acquire a user's step number in the present time period; determining the moving direction of the smart device in the time period by calculating the filtered X-axis and Y-axis acceleration sequences; determining the current position of the smart device by calculating the user's step number and the moving direction of the smart device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.