PRESSURE DIFFERENCE TRANSDUCER Russian patent published in 2011 - IPC G01L13/00 

FIELD: physics.

SUBSTANCE: proposed transducer consists of first sensitive element, first oscillation picking-up transducer and first oscillation excitation transducer, first amplifier with its input connected to first transducer of oscillation picking-up and with its output connected to first oscillation excitation transducer, as well as second oscillation picking-up transducer and second oscillation excitation transducer, second amplifier with its input connected to second transducer of oscillation picking-up and with its output connected to second oscillation excitation transducer. First and second sensitive elements form closed mechanical tonometre-type oscillatory systems First and second sensitive elements are arranged inside first and second tightly closed housings. First sensitive element is made up of primary transducer consisting of two aligned different-diameter tubes. Second sensitive element is made up of second primary transducer consisting of two aligned different-diameter tubes. First oscillation picking-up transducer and first oscillation excitation transducer are screwed in outer tube of first primary transducer and shifted through 90 degrees relative to each other. Second oscillation picking-up transducer and first oscillation excitation transducer are screwed in outer tube of second primary transducer and shifted through 90 degrees relative to each other. Second outputs of first and second amplifiers are connected to first and second imputer of adding transducer with its output connected to recorder that display pressure difference in measured medium.

EFFECT: higher accuracy and reliability.

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