ULTRASONIC PIEZOELECTRIC SENSOR Russian patent published in 2019 - IPC G01N29/22 

FIELD: measuring equipment.

SUBSTANCE: use for measurement of gas flow by ultrasonic piezoelectric sensor. Summary of invention consists in the fact that ultrasonic piezoelectric sensor has a metal housing having a cylindrical cavity in which a tread, a piezoelectric cell and a damper are arranged in series from the bottom of the cavity, on the end surfaces of the piezoelectric cell there are electrodes connected to the output conductors, one of which is connected to the electrode on the piezoelectric cell outer end relative to the protector, wherein piezoelectric cell has axisymmetric through hole, on inner end surface of piezo element facing the tread, in the location of through hole chamfer is made, equipped with an additional electrode made integral with electrode on internal end surface of piezoelectric cell, note here that other lead-in conductor is connected to extra electrode on chamfer via central through hole.

EFFECT: high sensitivity of the ultrasonic piezoelectric sensor by reducing the level of side lobes in the beam pattern while increasing the width of the beam pattern, which increases the dynamic range of measured gas flow rates.

1 cl, 3 dwg