Piezoelectric devices and methods and circuits for driving same

Details Piezoelectric devices and methods and circuits for driving same Piezoelectric devices and methods and circuits for driving same

2008-01-08

2008-01-08

Dougherty, Thomas M. (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S317000

Reexamination Certificate

active

11605450

ABSTRACT:
A drive circuit (18) senses a parameter of a piezoelectric actuator (14) operating in a device (10) and adjusts a drive signal of the piezoelectric actuator in accordance with the parameter. The drive circuit comprises a controller (100) which controls a drive signal applied to the piezoelectric actuator (14); a feedback monitor (122) which obtains a feedback signal from the piezoelectric actuator while the piezoelectric actuator works; and, a processor (116) which uses the feedback signal to determine the parameter of the piezoelectric actuator. In one example mode, the parameter of the piezoelectric actuator which is determined by the piezoelectric actuator drive circuit is the capacitance or dielectric constant of the piezoelectric actuator. In other example modes, the parameter of the piezoelectric actuator which is determined by the piezoelectric actuator drive circuit is impedance or resonant frequency of the piezoelectric actuator.

REFERENCES:
patent: 3500799 (1970-03-01), Benson
patent: 3936342 (1976-02-01), Matsubara et al.
patent: 4034780 (1977-07-01), Horvath
patent: 4095615 (1978-06-01), Ramsauer
patent: 4514742 (1985-04-01), Suga et al.
patent: 4853579 (1989-08-01), Kawasaki et al.
patent: 4859530 (1989-08-01), Roark et al.
patent: 4939405 (1990-07-01), Okuyama et al.
patent: 5021700 (1991-06-01), Takahashi et al.
patent: 5049421 (1991-09-01), Kosh
patent: 5070848 (1991-12-01), Mitsuyasu
patent: 5084345 (1992-01-01), Manos
patent: 5130598 (1992-07-01), Verheyen et al.
patent: 5195046 (1993-03-01), Gerardi et al.
patent: 5271724 (1993-12-01), van Lintel
patent: 5471721 (1995-12-01), Haertling
patent: 5517845 (1996-05-01), Yamashita et al.
patent: 5632841 (1997-05-01), Hellbaum et al.
patent: 5759015 (1998-06-01), van Lintel et al.
patent: 5816780 (1998-10-01), Bishop et al.
patent: 5849125 (1998-12-01), Clark
patent: 5876187 (1999-03-01), Afromowitz et al.
patent: 5892315 (1999-04-01), Gipson et al.
patent: 5945768 (1999-08-01), Treu, Jr.
patent: 6033191 (2000-03-01), Kamper et al.
patent: 6042345 (2000-03-01), Bishop et al.
patent: 6060811 (2000-05-01), Fox et al.
patent: 6071087 (2000-06-01), Jalink, Jr. et al.
patent: 6071088 (2000-06-01), Bishop et al.
patent: 6074178 (2000-06-01), Bishop et al.
patent: 6104127 (2000-08-01), Kameyama et al.
patent: 6109889 (2000-08-01), Zengerle et al.
patent: 6121714 (2000-09-01), Atsuta
patent: 6162313 (2000-12-01), Bansemir et al.
patent: 6179584 (2001-01-01), Howitz et al.
patent: 6213735 (2001-04-01), Henco et al.
patent: 6227809 (2001-05-01), Forster et al.
patent: 6227824 (2001-05-01), Stehr
patent: 6229245 (2001-05-01), Kitani
patent: 6246152 (2001-06-01), Fontanella et al.
patent: 6252512 (2001-06-01), Riley
patent: 6411009 (2002-06-01), Jaenker
patent: 6659978 (2003-12-01), Kasuga et al.
patent: 6716002 (2004-04-01), Higashino
patent: 6943785 (2005-09-01), Chou et al.
patent: 6950640 (2005-09-01), Ikeda et al.
patent: 6969941 (2005-11-01), Kapps et al.
patent: 6993812 (2006-02-01), Takahashi
patent: 7056096 (2006-06-01), Takagi et al.
patent: 7059836 (2006-06-01), Takagi et al.
patent: 7126822 (2006-10-01), Hu et al.
patent: 2002/0140441 (2002-10-01), Raffalt et al.
patent: 2002/0185938 (2002-12-01), Ikeda et al.
patent: 2003/0146956 (2003-08-01), Takahahsi
patent: 2004/0000843 (2004-01-01), East
patent: 2004/0018100 (2004-01-01), Takagi et al.
patent: 2004/0021398 (2004-02-01), East
patent: 2005/0186117 (2005-08-01), Uchiyama et al.
patent: 2005/0219288 (2005-10-01), Vogeley et al.
patent: 2005/0219302 (2005-10-01), Vogeley
patent: 2005/0225201 (2005-10-01), Vogeley
patent: 2005/0225202 (2005-10-01), Vogeley et al.
patent: 2005/0244288 (2005-11-01), O'Neill
patent: 57-211562 (1982-12-01), None
patent: 62-150051 (1987-07-01), None
patent: 62-186077 (1987-08-01), None
patent: 02-248671 (1990-10-01), None
patent: 03-015674 (1991-01-01), None
patent: 03-168373 (1991-07-01), None
patent: 06-117377 (1994-04-01), None
patent: 2002-136158 (2002-10-01), None
patent: 87/07218 (1987-12-01), None
Tanner, “Combined Shock and Vibration Isolation Through the Self-Powered, Semi-Active Control of a Magnetorheological Damper in Parallel with an Air Spring”, Dissertation submitted to the faculty of the Virginia Polytechnic Institute and State University, Dec. 2003.
Office Action mailed Jun. 13, 2007 in U.S. Appl. No. 10/815,999.
International Search Report and Written Opinion mailed May 16, 2007 in PCT application PCT/US05/11342.
International Search Report and Written Opinion mailed May 18, 2007 in PCT application PCT/US05/11579.
International Search Report and Written Opinion mailed Nov. 16, 2006 in corresponding PCT application No. PCT/US05/11344.
International Preliminary Report on Patentability mailed Oct. 12, 2006 in corresponding PCT application No. PCT/US05/11344.

Affiliated with

Also associated with

Rating

Piezoelectric devices and methods and circuits for driving same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Piezoelectric devices and methods and circuits for driving same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Piezoelectric devices and methods and circuits for driving same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3920758