Dynamic-quantity sensor

Details Dynamic-quantity sensor Dynamic-quantity sensor

2008-03-18

2008-03-18

Kwok, Helen (Department: 2856)

Measuring and testing

Speed, velocity, or acceleration

Acceleration determination utilizing inertial element

C073S504120

Reexamination Certificate

active

07343802

ABSTRACT:
A piezoelectric-vibrator series circuit including two series-connected piezoelectric vibrators to which stresses induced by a dynamic quantity are applied in opposite directions is used, and a Colpitts oscillator circuit is defined by the piezoelectric-vibrator series circuit and an amplifier circuit/load impedance circuit. A phase-difference-to-voltage converter circuit is provided to convert a phase difference between an output voltage of the oscillator circuit and a voltage at a piezoelectric-vibrator series node of the piezoelectric-vibrator series circuit into a voltage signal.

REFERENCES:
patent: 4060772 (1977-11-01), Yamada et al.
patent: 4544897 (1985-10-01), Ishikawa
patent: 6049157 (2000-04-01), Kobayashi
patent: 6134962 (2000-10-01), Sugitani
patent: 6588276 (2003-07-01), Yamashita
patent: 6763726 (2004-07-01), Yamashita
patent: 7109636 (2006-09-01), Yamashita
patent: 2002/0125792 (2002-09-01), Tabota
patent: 2003/0164696 (2003-09-01), Yamashita
patent: 2002-122614 (2002-04-01), None
patent: 2002-243757 (2002-08-01), None
patent: 2003-254991 (2003-09-01), None
patent: 2005-223508 (2005-08-01), None
International Search Report issued in the corresponding International Application No. PCT/JP2005/001498, mailed on Apr. 26, 2005.

Affiliated with

Also associated with

Rating

Dynamic-quantity sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2795623