小型水声功率放大设计及换能器匹配技术研究  

Design of the Small Underwater Acoustic Power Amplifier and Research on the Transducer Matching Technology

作　　者：崔娟[1,2] 张文栋[1,2] 王红亮[1,2] 张慧[1,2] 薛晨阳[1,2] 

机构地区：[1]中北大学电子测试国家重点实验室,山西太原030051 [2]中北大学仪器科学与动态测试教育部重点实验室,山西太原030051

出　　处：《自动化仪表》2015年第5期100-102,共3页Process Automation Instrumentation

基　　金：国家自然科学基金资助项目(编号:61127008);国家863计划基金资助项目(编号:2011AA040404)

摘　　要：针对200 k Hz的小型水下超声压电换能器线阵的超声发射功率要求,通过对常用水声功率放大电路的分析,设计了一种基于D类功放原理的互补推挽式功率放大电路;并根据换能器和功放的阻抗特性,选择串联调谐进行了阻抗匹配设计。仿真分析表明,设计的功率放大电路输出功率最大值为17.47 W,实际测试超声发射信号较强、稳定性好、干扰小。该功率放大电路满足设计要求,有较高的应用价值。In accordance with the requirement of ultrasonic transmitting power upon 200 kHz small underwater acoustic piezoelectric transducer line array, the complementary push-pun power amplification circuit based on class-D power amplification principle has been designed. In addition, based on the impedance characteristics of transducer and power amplifier, impedance matching design is conducted by selecting series tuning. The simulation analysis shows that the maximum output power of the power amplifier designed is 17.47 W, and the actual tested ultrasonic transmitter signals are stronger, stable, with small interference, that means the power amplifier meets design requirement, and possesses higher applicable values.

关 键 词：水下超声压电换能器 发射功率 D类功放 互补推挽式 串联调谐 阻抗匹配 

分 类 号：N52[自然科学总论]