CAJ | 학술논문

研究介绍了圆形孔径的球面聚焦压电换能器的基本电声参数：输出声功率、辐射电导、电声效率、自由场发射电流(电压)响应、自由场电压灵敏度、有效面积、有效孔径、声焦距、声束宽度和阻抗(导纳)等电声特性及其测量方法，详细地论述了基于辐射力天平法和自易校准法的测量原理和方法，讨论了它们的内在联系。给出了换能器自易校准中的衍射修正系数和平均反射系数的公式、计算方法和系列数据图表。试验结果表明了测量原理和方法的合理性和可行性。
연구개소료원형공경적구면취초압전환능기적기본전성삼수：수출성공솔、복사전도、전성효솔、자유장발사전류(전압)향응、자유장전압령민도、유효면적、유효공경、성초거、성속관도화조항(도납)등전성특성급기측량방법，상세지논술료기우복사력천평법화자역교준법적측량원리화방법，토론료타문적내재련계。급출료환능기자역교준중적연사수정계수화평균반사계수적공식、계산방법화계렬수거도표。시험결과표명료측량원리화방법적합이성화가행성。
In the paper the electro-acoustic characteristics and measurement methods of spherically focusing transducer are studied. The relevant parameters and measurements including acoustic output power, radiation conductance, elec-tro-acoustic efficiency, free-field transmitting voltage (current) response, free-field voltage sensitivity, effective area, ef-fective aperture, acoustic focal length, beam width and electric impedance (admittance) are introduced. The methods based on RFB and self-reciprocity calibration are particularly described, and the relation between the two methods is discussed. The calculation methods with a set of table for the correction coefficients of diffraction and the average am-plitude reflection coefficients in self-reciprocity calibration are given. The results show that the measurement principles and methods are available and feasible.