Title :
S.A.W. co-ordinate sensor
Author :
Dieulesaint, E. ; Royer, D. ; Ballegeer, J.C.
Author_Institution :
Université Pierre et Marie Curie, Laboratoire d´´Acoustoélectricité, Paris, France
Abstract :
The co-ordinates of the tip of a pencil lightly pressed on a piezoelectric crystal are deduced from measurements of the time necessary for surface acoustic waves (s.a.w.) to propagate from interdigital transducers to the pencil. Graphs drawn by the pencil moving on the crystal can be stored in a computer at a fast rate. Examples of data acquisition are given.
Keywords :
acoustic surface wave devices; computer graphic equipment; interactive terminals; SAW coordinate detector; data acquisition; interactive graphics; interdigital transducers; piezoelectric crystal;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19760446
