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六压电换能器的应用 (一) 压电陶瓷电声器件一个优质的压电陶瓷送话器,必须首先选择高的机电耦合系数、低机械品质因数,适当高的介电常数的材料,同时选用适当的振动模式及合理的制作工艺。目前使用的压电片,一般采用两个圆形或椭圆形的陶瓷片,中间粘以金属片组成弯曲振动模式,共结构有单片及双片之分如图5-14,双片法有极性相反的串联接法,其阻抗较高;有极性相同的并联接法,其阻抗
Six Piezoelectric Transducer Applications (A) piezoelectric ceramic electroacoustic device A high-quality piezoelectric ceramic microphone, you must first select a high mechanical and electrical coupling coefficient, low mechanical quality factor, the appropriate high dielectric constant of the material, At the same time choose the appropriate vibration mode and a reasonable production process. Currently used piezoelectric films, the general use of two round or oval ceramic tiles, the middle sticky metal plate composed of bending vibration mode, the total structure of a single and double-chip points in Figure 5-14, two-chip method The opposite polarity of the series connection, the higher impedance; parallel connection with the same polarity, the impedance