Lamb wave graphic tablet

Lamb wave graphic tablet

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A graphic sensor based on the measurement of the propagation time of an acoustic wave train is described. Lamb waves are launched in a plate of ordinary glass by piezoelectric bars bonded to the edges of the plate. They are detected at their arrival under the tip of the drawing pencil by a small piezoelectric disc placed in the pencil body. The useful area of the tablet is 19×27 cm2; the resolution is about 0.2 mm.


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    2. 2)
      • : `Summagraphics Corporation', 422049, 12 May 1973, US patent.
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      • P.W. Woo . A proposal for input of hand-drawn information to a digital system. IEEE Trans. , 609 - 611
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      • E. Dieulesaint , D. Royer , J.C. Ballegeer . SAW co-ordinates sensor. Electron. Lett. , 586 - 587
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      • E. Dieulesaint , D. Royer , B. Thiriet , J.C. Ballegeer . SAW graphic sensor. IEEE ultrason. symp. proc. , 198 - 200
    7. 7)
      • A. Ishii , S. Hashimoto . Graphic sensor using a Lamb wave. IEEE ultrason. symp. proc. , 167 - 170
    8. 8)
      • I.A. Viktorov . (1967) , Rayleigh and Lamb waves.

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