| 摘要 |
FIELD: engineering of piezo-electric transformers. ^ SUBSTANCE: ultrasound piezo-transformer with dry acoustic contact contains solid sound duct, having internal working side for dry acoustic contact with environment being researched. Solid sound duct consists of two parts of similar or different compositions, combined as single block, one of which, containing internal working side, is made of solid material, and another one, containing external working side, is made in form of plate of porous material, having solid matrix, with volume of pores not less than 17% of plate volume. ^ EFFECT: increased transfer coefficient, expanded working range of temperatures. ^ 8 cl, 1 dwg |
