Method and apparatus for determining the coordinates of a...

Details Method and apparatus for determining the coordinates of a... Method and apparatus for determining the coordinates of a...

G - Physics

08

C

340/135.1

G08C 21/00 (2006.01) G01B 7/004 (2006.01) G06F 3/033 (2006.01)

Patent

CA 1194582

A B S T R A C T METHOD AND APPARATUS FOR DETERMINING THE COORDINATES OF A POINT ON A SURFACE. A screen is disclosed on the surface of which a certain number of resistant conducting emitter strips and insulated conducting receiver strips are laid, the emitter strips being parallel-mounted with the terminals of a voltage generator and the receiver strips being interlaid between the receiver strips such that a conducting receiver strip lies between two resistant emitter strips. The electronics of control comprises an exploring stage to control the receiver strip time-related exploration. Thus, when a sufficiently conducting object used to indicate a point, has touched the surface and bridge an emitter and a receiver strips, a higher potential is detected on the corresponding receiver strip and the ordonate Y is given by the strip order number - while the abscissa X is calculated from measuring the potential between each ends of the emitter strip and the object.

420328

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