Displacement generating device

Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

310317, 310332, 360 75, H01L 4108

Patent

active

046895140

ABSTRACT:
In a displacement generating device, a voltage signal generator produces a triangular-wave drive voltage signal so as to drive a piezoelectric element in a desired vibration mode. The voltage signal generator is connected to the piezoelectric element through a differentiator and a constant current supply. The drive voltage signal is differentiated by the differentiator, and is then supplied as a rectangular-wave voltage signal to the constant current supply. Since constant currents having two levels are alternately supplied to the piezoelectric element, an amount of charge accumulated in the piezoelectric element can be controlled linearly during the current supply time. As a result, since displacement of the piezoelectric element is linearly controlled in proportion to the amount of charge, it coincides with the triangular waveform of the drive voltage signal. A vibration mode free from hysteresis can be obtained.

REFERENCES:
patent: 3879698 (1975-04-01), Pepper
patent: 3916226 (1975-10-01), Knoll
patent: 4237399 (1980-12-01), Sakamoto
patent: 4259605 (1981-03-01), Rijckaert
patent: 4263527 (1981-04-01), Comstock
patent: 4395741 (1983-07-01), Kobayashi et al.
patent: 4513334 (1985-04-01), Otsuka
patent: 4514773 (1985-04-01), Susz
patent: 4594526 (1986-06-01), Araki et al.
Electronics Letter May 27, 1982, vol. 18, No. II "Improving the Linearity of Piezoelectric Activators" C. V. Newcomb, J. Flinn.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Displacement generating device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Displacement generating device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Displacement generating device will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1924623

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.