Measuring and testing – Speed – velocity – or acceleration – Angular rate using wave or beam motion
Reexamination Certificate
2011-03-08
2011-03-08
Chapman, John E (Department: 2856)
Measuring and testing
Speed, velocity, or acceleration
Angular rate using wave or beam motion
Reexamination Certificate
active
07900512
ABSTRACT:
An angular rate sensor comprises a piezoelectric film having a first and a second surfaces forming an x-y plane and utilizes a perturbation mass coherently vibrating elastic acoustic waves on which a Coriolis force acts when the angular rate sensor undergoes a rotary motion about an x-direction. A first elastic acoustic wave is excited in the piezoelectric film by a driving transducer and a second elastic acoustic wave generated by the Coriolis force proportional to an angular rate of the rotary motion of the angular rate sensor itself is detected by the detecting transducer. The angular rate sensor further comprises at least a first electrode disposed on the first surface of the piezoelectric film for discharging a surface charge caused due to piezoelectric effect at the lower surface of the film in which the first elastic acoustic wave is excited.
REFERENCES:
patent: 6516665 (2003-02-01), Varadan et al.
patent: 6984332 (2006-01-01), Varadan et al.
patent: 44 03 646 (2005-06-01), None
patent: A-61-247914 (1986-11-01), None
patent: A-62-148812 (1987-07-01), None
patent: A-06-281465 (1994-10-01), None
patent: A-08-145687 (1996-06-01), None
patent: A-08-233577 (1996-09-01), None
patent: H08-334330 (1996-12-01), None
patent: A-09-178488 (1997-07-01), None
patent: A-09-264745 (1997-10-01), None
patent: A-10-221082 (1998-08-01), None
patent: A-10-332380 (1998-12-01), None
Office Action dated Jul. 21, 2009 from German Patent Office in corresponding DE application No. 10 2007 034 759.8-54 (and English translation).
Arakawa Kazuki
Asami Kazushi
Kano Kazuhiko
Teshigahara Akihiko
Chapman John E
Denso Corporation
Posz Law Group , PLC
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