ULTRASONIC PIEZOELECTRIC CONVERTER Russian patent published in 2011 - IPC G01N29/22 

FIELD: electricity.

SUBSTANCE: ultrasonic piezoelectric converter comprises a protector installed in a body, a piezoelectric cell, a damper and outputs connected to a piezoelectric cell. At the same time between the protector and the piezoelectric cell there are two matching layers, one of which is in contact with the piezoelectric cell and is made of a nanocomposite material based on a high-pressure polyethylene, containing iron nanoparticles with volume concentration of 12-25%, the other one - of material with acoustic impedance within the limits of (2.4-5.0)×10⁷ kg/s×m². At the same time the layer of nanocomposite material is made with the thickness h₁, selected from the range of values h₁=150f-600f, and the other layer - with thickness h₂=720f-1450f. At the same time the protector thickness is h₃=165f-1480f ([h₁]=[h₂]=[h₃]=mm, [f]=kHz).

EFFECT: increased efficiency of the piezoelectric converter operation due to increased ratio of the electric signal conversion into an acoustic one, and for increase of information signal capacity that arrives to the receiver.

6 cl, 4 dwg