PIEZOELECTRIC SHOCK WAVE PRESSURE SENSOR Russian patent published in 2023 - IPC G01L9/08 

FIELD: instrumentation.

SUBSTANCE: invention relates to piezoelectric pressure sensors designed to measure rapidly changing pressures in a gaseous medium. In a piezoelectric pressure sensor of shock waves, containing a conductive housing, on one side of which a membrane is fixed, on the other side of which a base is fixed, two piezoelements with a current-collecting plate between them, a conductive inertial mass and a vibration-compensating piezoelement polarized in the opposite direction relative to the piezoelements are located behind the membrane. The novelty is that the vibration-compensating piezoelectric element is electrically connected to one of the piezoelectric elements and a capacitor is introduced, electrically connected in parallel to the vibration-compensating piezoelectric element with one output through the base, and the other output through the conductive inertial mass.

EFFECT: reduced amplitude of oscillations in the electrical signal of the piezoelectric sensor caused by vibrational accelerations in the sensor design.

1 cl, 2 dwg