The paper demonstrates a system that is capable of locating the position of knocks on top of a table for context-aware applications. Four sensors, located near the table corners, are employed to record the acoustic waveform coming from the impacts. A microprocessor extracts relevant characteristics from these signals including amplitudes and differential timings, which are then used to estimate the location of the hit. As this system requires only simple hardware, no special adaptation of the touch screen is needed. Further, as all sensors are mounted on the inner surface, the system is easy to deploy as a retrofit to existing tables. The technique can be applied to detect commands in responsive environments.
|Number of pages||12|
|Journal||International Journal of Innovative Computing, Information and Control|
|Publication status||Published - 2011 Dec 1|
All Science Journal Classification (ASJC) codes
- Theoretical Computer Science
- Information Systems
- Computational Theory and Mathematics