Patent ID: 6050144
Filing Date: 2000-04-18
Classification: G01P

Abstract:
An acceleration sensor comprising:a piezoelectric element formed in a rectangular shape and including a piezoelectric member layer havinga plurality of stacked piezoelectric members, such that at least two of the stacked piezoelectric members are polarized, anda plurality of electrodes positioned such thatat least one electrode is disposed on a first major opposed surface of said piezoelectric member layer,at least one electrode is disposed on each major opposed surface of each polarized piezoelectric member, anda vibration detection electrode and a drive electrode are disposed on at least a second major opposed surface of the piezoelectric member layer,the vibration detection electrode being positioned at a center of the second major opposed surface, andthe drive electrode having two electrically connected parts, each part being located on or near a longitudinal edge of the second major opposed surface, andimpedances formed by each polarized piezoelectric member with the at least one electrode disposed on each major surface thereof are electrically connected in parallel; anda support member for supporting the piezoelectric element, the support member supporting the piezoelectric element substantially at a center of a length of the piezoelectric member layer.