| 摘要 |
A coordinate digitizer wherein a field generating device is positioned in proximity to the surface at a location to be digitized. Further means are provided for triggering the production of a magnetic field by the field generating device, the magnetic field transducing a propagating vibrational mode into the transmission media. Pick-up means are coupled to the transmission media and respond to the propagating vibrational mode for providing a signal to a utilizational device which will respond to the means triggering production of the field as well as to the pick-up means in order to provide a position signal corresponding to the time of propagation of the vibrational mode from its time of generation to its time of pick-up. The vibrational mode is effected by means of a strain wave magnetostrictively induced by the magnetic field into the transmission media. The transmission media constitutes a plurality of magnetostrictive wires arrayed along the support surface. The magnetic field generating device may be an individual stylus in the shape of a writing implement or a cursor. The field may be energized by means of a series of pulses or by individual pulses as desired. |
