PIEZOELECTRIC PRESSURE SENSOR Russian patent published in 2012 - IPC G01L9/08 

FIELD: physics.

SUBSTANCE: pressure sensor has a housing with an inner hole and a membrane covering it which is integrated into the housing, a cylindrical force-transmitting bushing, piezoelectric elements, a current collector and a clamping element, all fitted into the hole in the housing. The membrane is planoconcave has radius of curvature of the concave part of 0.5d≤R≤3d, where d is the diameter of the membrane. The cylindrical force-transmitting bushing is in form of a flattened cone on the membrane side and in form of a cylindrical depression with a cylindrical protrusion at the centre of the depression on the piezoelectric element side. The piezoelectric elements are placed in a current-insulating cylindrical sleeve which is placed in the depression of the force-transmitting bushing such that one of the piezoelectric elements is in contact with the protrusion in the depression of the force-transmitting bushing, and the other piezoelectric element is contact with the current collector.

EFFECT: high accuracy and rapid measurement of pulsed pressure.

1 dwg