| 摘要 |
FIELD: electricity.SUBSTANCE: ultrasound immersion multisection piezoelectric transducer comprises hermetic package filled with damping substance, piezoelectric cells installed inside the package and placed symmetrically in regard to the converter acoustic axis and lens placed from the side of radiation surface of piezoelectric cells, acoustic axes of piezoelectric cells are intercrossed at the longitudinal axis of the converter, polarization vector of all piezoelectric cells is directed to the radiation side or to the damping substance side, at that lens is common for all piezoelectric cells or it consists of separate sections. Piezoelectric cells are placed so that they form convex or concave surface in regard to lens, all piezoelectric cells are made with positive and negative electrodes common for them, which cover gaps between piezoelectric cells filled with polymer compound and connected to sealed electric connector. Lens and damping substance with their surfaces are faced to the formed piezoelectric cells and polymer compound and each of them adjoins electrodes at these surfaces tightly; at that lens is glued to the electrode placed at piezoelectric cells or adjoins the electrode tightly through the layer of acoustically conductive fluid.EFFECT: potential increase of the operating zone length and expansion of direction pattern for the piezoelectric transducer at simultaneous simplification of its design.6 cl, 3 dwg |
