Patent ID: 6263734
Filing Date: 2001-07-24
Classification: G01P

Abstract:
A piezoelectric acceleration sensor comprising:a longitudinal effect type piezoelectric element which has a first piezoelectric body and outputs a voltage according to an expansion and contraction and a shear deformation of said first piezoelectric body;a lateral effect type piezoelectric element which has a second piezoelectric body and outputs a voltage according to a flexure of said second piezoelectric body; anda sensor substrate on which said longitudinal effect type piezoelectric element and said lateral effect type piezoelectric element are fixed, wherein under an X-Y-Z three dimensional coordinate system including an X-Y plane having the sensor substrate thereon said longitudinal effect type piezoelectric element is fixed to output a voltage according to an acceleration component in a Z-axis direction added to a voltage according to an acceleration component in an X-Y plane direction, said lateral effect type piezoelectric element fixed to output a voltage according to an acceleration component in a Z-axis direction; anda detecting means to output a detection signal according to an applied acceleration based on the voltage output from said longitudinal effect type piezoelectric element and said lateral effect type piezoelectric element.