Patent ID: 6227051
Filing Date: 2001-05-08
Classification: G01P

Abstract:
An acceleration sensor comprising:a piezoelectric element which includes a piezoelectric member layer in which a plurality of piezoelectric members are stacked and electrodes which are disposed in major opposed surfaces of said piezoelectric member layer; and a support member for supporting said piezoelectric element, and wherein;some piezoelectric members of said piezoelectric member layer are polarized,said electrodes are disposed in both surfaces of the polarized piezoelectric members,impedances are formed by said polarized piezoelectric members and said electrodes in both surfaces of said polarized piezoelectric members and said impedances are electrically connected in parallel with each other,said piezoelectric member layer is formed in a rectangular shape,an electrode in at least one surface of said piezoelectric member layer is divided into two electrodes, andsaid divided two electrodes are disposed substantially along longer sides of said piezoelectric element.