Acoustic navigation device and method of detecting movement...

Details Acoustic navigation device and method of detecting movement... Acoustic navigation device and method of detecting movement...

2007-09-18

2010-11-02

Pihulic, Dan (Department: 3662)

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

With time interval measuring means

Reexamination Certificate

active

07826310

ABSTRACT:
A navigation device for navigating a user interface of a processor-controlled device includes an acoustic transmitter adapted to transmit an acoustic signal, an acoustic receiver adapted to receive the acoustic signal and located at a fixed position with respect to the acoustic transmitter, and a measurement circuit coupled to an output of the acoustic receiver and adapted to determine a distance traversed by the navigation device as a function of time.

REFERENCES:
patent: 4991148 (1991-02-01), Gilchrist
patent: 5239139 (1993-08-01), Zuta
patent: 2006/0196272 (2006-09-01), Sugiura et al.
patent: 2009/0073811 (2009-03-01), Unkrich

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