Touchless sensing and gesture recognition using continuous wave ultrasound signals
US8907929B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2010 |
| Grant date | Dec 9, 2014 |
| Priority date | — |
| Expiry date | Apr 21, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/325
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The embodiments provide systems and methods for touchless sensing and gesture recognition using continuous wave sound signals. Continuous wave sound, such as ultrasound, emitted by a transmitter may reflect from an object, and be received by one or more sound receivers. Sound signals may be temporally encoded. Received sound signals may be processed to determine a channel impulse response or calculate time of flight. Determined channel impulse responses may be processed to extract recognizable features or angles. Extracted features may be compared to a database of features to identify a user input gesture associated with the matched feature. Angles of channel impulse response curves may be associated with an input gesture. Time of flight values from each receiver may be used to determine coordinates of the reflecting object. Embodiments may be implemented as part of a graphical user interface. Embodiments may be used to determine a location of an emitter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.