Three dimensional object-localization and tracking using ultrasonic pulses with synchronized inertial position determination
US11269047B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Dec 6, 2018 |
| Grant date | Mar 8, 2022 |
| Priority date | — |
| Expiry date | Jan 6, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0346
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A tracking method is disclosed. The method may include displaying visual content on a screen. A base station may be stationary with respect to the screen while the visual content is being displayed. In contrast, one or more objects may move with respect to the screen while the visual content is being displayed. The one or more objects may be tracked so that the movement thereof may be used to alter the visual content. Such tracking may involve the base station and the one or more objects sending and/or receiving one or more ultrasonic pulses. The tracked object also determines information using an inertial sensor assembly that receives a synchronization signal coordinated with the one or more ultrasonic pulses. Time-difference-of-arrival and/or time-of-flight of the one or more ultrasonic pulses may then be used to estimate a relative location and/or a relative orientation of the one or more objects with respect to the base station in three dimensional space, so that the estimate is fused with information determined by the inertial sensor assembly using the synchronization signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.