Title:
PIEZOELECTRIC SENSOR
Document Type and Number:
Japanese Patent JP2001153660
Kind Code:
A
Abstract:
To provide a piezoelectric sensor capable of preventing the effect of voice noise by setting the driving frequency of a piezoelectric vibrator to 20 kHz or more.
This piezoelectric sensor comprises vibration driving electrodes 11-14 and vibration detecting electrodes 15-18 formed on one main surface of a disc-like piezoelectric ceramic substrate 10 to detect the Coriolis force by a change in angular velocity by use of two different vibration modes. The relation between the diameter D of the vibrating area of the piezoelectric ceramic substrate 10 and the thickness T of the substrate 10 is set to be D<K×T (K is a constant of 26).
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Inventors:
KITANISHI SHINICHIRO
HARIKI TAKESHI
HARIKI TAKESHI
Application Number:
JP33997699A
Publication Date:
June 08, 2001
Filing Date:
November 30, 1999
Export Citation:
Assignee:
KYOCERA CORP
International Classes:
G01C19/56; (IPC1-7): G01C19/56; G01P9/04