Means and method for automatic resonance tuning

Details Means and method for automatic resonance tuning Means and method for automatic resonance tuning

G - Physics

10

G

G10G 7/02 (2006.01) G10D 3/14 (2006.01)

Patent

CA 2079216

2079216 9115011 PCTABS00007 A method and apparatus is provided for the adjustment of resonance on a freely vibrating filament (44) by the use of piezoelectric pushers (3) which are solid state devices whose lengths change as a result of applied voltage. The pushers (3) are configured in such a manner that changes in the pushers' lengths are translated into changes in resonance. The pushers are controlled by feed-back circuits (2) wherein frequency of vibration is compared to an electronically generated reference. The resulting error signals are input to DC amplifiers (11) which drive the piezoelectric pushers (3) so as to eliminate the error.

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