Researches on Fabrication Techniques and Underwater Experiment for Cymbal Transducer
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摘要: 设计方法与制作工艺是开发低频钹式换能器的核心技术。首先在继承传统压电材料制作工艺的基础上，根据钹式换能器的设计规律，研制了含有低频换能器在内的多套金属帽冲压模具，比较了粘结剂、金属材料等的不同特点，给出了合成钹式阵元的一般性方法，掌握了制作钹式阵元的特殊工艺，由此可开发系列阵元；然后，针对其中的低频阵元，在消声水池实验中分别对阵元的共振频率、发射幅压响应、自由场接收灵敏度等进行了测试。实验结果表明，低频钹式阵元具有较好的接收效果，单个5 kHz钹式阵元在0~40 kHz工作时，其自由场接收灵敏度在-170 ~-150 dB之间，其发射幅压值135 dB，可通过成阵提高发射指标。研究结果为开发新型钹式声学装置提供了依据。Abstract: Base on the conventional fabrication technique of piezoelectric ceramic and the design rule of cymbal transducer,forming dies for metal caps of cymbals including low frequency cymbal transducers are developed, the characteristics of different glues and metal materials are compared respectively. Following the method for making cymbal transducers and the key fabrication technique, a series of cymbal transducers are developed. Then the resonance frequency, transmitting voltage response(TVR),free field voltage sensitivity(FFVS) of the low frequency cymbal transducer are tested in an anechoic tank.The results show that the low frequency cymbal transducers have better effect of reception.The FFVS of single cymbal transducer with 5 kHZ frequencyis in the range of -170 ~-150 dB for the working frequencies from 0 to 40 kHz.Also TVR gets to 135 dB,which can be enhanced by cymbal transducer array.This study may provide a refrerence for developing new cymbal transducer.
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