SENSOR OF VIBRATION DENSITY METER (VERSIONS) Russian patent published in 2020 - IPC G01N9/00 G01N11/16 

FIELD: measurement.

SUBSTANCE: invention relates to devices for measuring density and viscosity of liquid media. According to the first version, the sensor of the vibration densimeter includes a hollow cylindrical housing, on one of the ends of which a metal membrane is tightly fixed. A piezoelectric element is attached to the inner side of the membrane, and to the outer side of the membrane there attached is a mechanical oscillation converter, made in the form of a tuning fork, to which a hollow cylindrical resonator is attached in longitudinal direction. At that, the tuning fork base is fixed to the membrane, and prongs of the tuning fork are attached to the end of the hollow cylindrical resonator. According to the second version, the sensor of the vibration density meter has a hollow cylindrical housing, on one of the ends of which a metal membrane is tightly fixed, note here that piezoelectric element is attached to inner side of membrane and mechanical oscillation transducer is attached to outer side of said membrane. Note here that it is composed of tuning fork with hollow cylindrical resonator secured therein in transverse direction. At that, the tuning fork base is attached to the membrane, and prongs of the tuning fork are attached to the side surfaces of the hollow cylindrical resonator.

EFFECT: high accuracy of measuring density of liquid with simple design of sensor.

5 cl, 8 dwg