RECEIVER OF LOW-FREQUENCY PRESSURE FLUCTUATIONS IN WATER ENVIRONMENT Russian patent published in 2013 - IPC G01L9/08 H01L27/20 

FIELD: measurement equipment.

SUBSTANCE: receiver includes the main and additional piezoelectric elements, a housing made from heat-conducting material, for example from metal. The main piezoelectric element is attached on the outer side of the housing and receives water environment pressure fluctuations, as well as fluctuations of water temperature and housing displacement as interference components. The additional piezoelectric element identical to the main one is attached to the housing in air cavity inside the housing, where it is isolated from water environment pressure fluctuations, but receives temperature fluctuations of water environment and displacement of the housing. Both piezoelectric elements are connected parallel to each other with opposite direction of polarisation signs and made from identical piezoelectric material.

EFFECT: effective compensation of interference in a signal recorded by a receiver, which are determined by action on the receiver of fluctuation of water environment temperature and displacements.

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