SENSOR FOR DETERMINING FLOW RATE, DENSITY AND TEMPERATURE WITH CLOSED SYSTEM OF OSCILLATIONS Russian patent published in 2013 - IPC G01F1/56 

FIELD: measurement equipment.

SUBSTANCE: sensor includes a housing in the form of a cylinder with inlet and outlet openings, a resonator, a flow metre vibrator and a temperature sensitive element, which are located inside the housing, a sensor of excitation of the flow metre oscillations, a sensor of pickup of the flow metre oscillations, a sensor of excitation of a density metre oscillations, a sensor of pickup of the density metre oscillations, a flow metre amplifier, a density metre amplifier, a converter, a density and temperature recorder and a flow rate recorder. Resonator is made of two coaxial tubes of different diametre, which are connected with upper bases to each other and with lower bases to each other by means of upper and lower shaped bushings respectively. The flow metre vibrator is made in the form of a thin plate and welded with side ribs to inner surface of the internal tube of the resonator with possibility of cutting the test medium flow into two symmetrical parts. Sensors of excitation and pickup of the flow metre oscillations, sensors of excitation and pickup of the density metre oscillations are screwed into an external tube of the resonator and equally spaced from upper and lower bases of the resonator external tube. With that, sensors of excitation and pickup of the flow metre oscillations are located perpendicular to surface of the flow metre vibrator and are located opposite each other, and sensors of excitation and pickup of the density metre oscillations are offset relative to sensors of excitation and pickup of the flow metre oscillations through 90 degrees. The flow metre amplifier forms an autooscillation circuit of the flow metre with a flow metre oscillations pickup sensor, a flow metre oscillations excitation sensor, and flow metre vibrator and a resonator. The density metre amplifier forms an autooscillation circuit of the density metre with a density metre oscillations pickup sensor, a density metre oscillations excitation sensor and a resonator.

EFFECT: improving operating reliability, accuracy of determination, operating life and resistance to ionising radiation.

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