Patent ID: 6800986
Filing Date: 2004-10-05
Classification: G01P

Abstract:
A piezoelectric sensor comprising:a piezoelectric device including a plurality of electrode films and a plurality of piezoelectric ceramic layers; a first support member having a first projection; and a second support member having a second projection; wherein said piezoelectric ceramic layers have a number of at least 4 and are alternately laminated with said electrode films; wherein said first and second support members are arranged such that said first and second projections are opposed to each other; and wherein said piezoelectric device is disposed between said first and second projections and held between an end face of said first projection and an end face of said second projections; said piezoelectric device has a longitudinally intermediate part held between said end faces of said first and second projections; said first projection is disposed at a longitudinally intermediate part of said first support member; said second projection is disposed at a longitudinally intermediate part of said second support member; said piezoelectric device is disposed between said first and second projections while longitudinally aligning with said first and second support members; said first support member further comprises a first depression, said first depression longitudinally extending on each side of said first projection; and said second support member further comprises a second depression, said second depression longitudinally extending on each side of said second projection.