Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Shih-Chia Hsieh0
Ying-Da Wu0
Yang-Chi Kuo0
Shih-Wang Tu0
Date of Patent
July 5, 2011
0Patent Application Number
120020180
Date Filed
December 14, 2007
0Patent Primary Examiner
Patent abstract
A direction and speed control device for an electronic wheelchair includes: a base member mounted on the electronic wheelchair; a manually operable pointing unit mounted on the base member and including a control stick pivotable relative to the base member; first and second three-axis g acceleration sensors, each generating a voltage output indicative of tilt of a respective one of the control stick and the base member in three orthogonal axes; and a control unit operable so as to process the voltage outputs of the first and second three-axis g acceleration sensors to generate corresponding control signals for controlling rotation direction and speed of a wheel unit of the electronic wheelchair.
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