ACOUSTIC EMISSIVE DETECTOR OF RESONANT TYPE Russian patent published in 2009 - IPC G01N29/14 

FIELD: physics, measurement.

SUBSTANCE: application: for detection of solid phase in gas-liquid flow in pipeline. The acoustic emissive detector of resonant type comprises body, piezoelectric cell with electrodes, receiver and fastening device, at that receiver contacts to piezoelectric cell, at that detector additionally comprises adjustment device installed on the free side of piezoelectric cell, and spring installed downstream adjuster, and fastening device is made in the form of two pressing nuts, at that receiver is made as separate with body in the form of cylinder with flat and convex end surfaces, and calibration device - in the form of floating pair that includes serially installed flat-convex metal lens and contact conic bushing with spherical side surface, at that flat surface of metal lens contacts to piezoelectric cell, and its convex surface arranged as spherical contacts to conic surface of bushing, at that the first pressing nut is installed on the side of convex end surface of cylindrical receiver, and the second one - on the spring side.

EFFECT: increased sensitivity of detector.

10 cl, 3 dwg