【摘要】 负载为固体的探头，其频率特性的最大值并不与半波振子的固有频率相同，最佳工作频率决定于频率特性最大值偏移的大小，并与表面加工质量有关。当时分辩率要求不高时，采用声阻抗较小的材料构成λ／４的耦合层来提高换能器的灵敏度。更多还原

【Abstract】 For a solid .load of probe the maximum characteristic frequency is not equal to the natural frequency of half-wave’s piezoelectric vioretor The best test frequency is determined by both the maximum offsetting quantity of frequency characteristic and the working quality of suface When the demand of distingushability is not too high,the sensitivity of transducer can be increased by using the coupled layer of /4 which composed of .the smaller. acoustic impedance’s...material.更多还原