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引信新型超声压电换能器及其基阵设计

发表时间:2012-11-30  浏览量:1623  下载量:660
全部作者: 杨坚,陈荷娟,谭菊琴,张营,赵国库
作者单位: 南京理工大学机械工程学院;大连海事大学自动化与电气工程学院
摘 要: 根据压电换能器等效电路,分析了压电换能器在脉冲信号激励下的响应,确定了激励信号的最佳占空比为50%. 从提高换能器抗过载能力和长储性的角度出发,采用P-51压电陶瓷材料和环氧绝缘板制作了压电换能器,确定了锥台形6阵元换能器基阵的结构,设计了新型收发转换电路,由于实验室条件有限,自制了压电换能器导纳测量装置,配合实验室已有的数字信号发生器和计算机,完成压电换能器的导纳特性测量。模拟分析结果表明:增大其阻尼系数将缩短压电换能器稳定时间,发射超声波强度不同,各换能器指向性指数的最大值不同,实测指向性指数曲线变化规律与理论基本一致。
关 键 词: 机械电子工程;引信;超声波探测;超声波换能器;基阵
Title: Design of piezoelectric transducer and its array for novel fuze ultrasonic detector
Author: YANG Jian, CHEN Hejuan, TAN Jvqin, ZHANG Ying, ZHAO Guoku
Organization: School of Mechanical Engineering, Nanjing University of Science and Technology; College of Automation and Electrical Engineering, Dalian Maritime University
Abstract: According to the equivalent circuit of the piezoelectric transducer, its response driving by the pulse signal was studied, and the optimum duty ratio of the actuating signal is 50%. In order to improve the shock resistance and long-term storage ability, the P-51 piezoelectric ceramic material and epoxy insulation board were used to make piezoelectric transducers. The structure of the transducer array, which was assembled with 6 transducers, was optimized, and a new transmit-receive switching circuit was designed. The admittance measuring apparatus of piezoelectric transducer was made, and the transducers’ admittance attributes were measured using the self-made apparatus and the available instruments in the laboratory, such as digitized signal generator and computer. The results showed that increasing of its damping coefficient will shorten the piezoelectric transducer stable time. ultrasonic intensity and maximum directivity index of each transducer are different, the directivity index curve and theory curve are the same.
Key words: mechatronics; fuze; ultrasonic detecting; ultrasonic transducer; array
发表期数: 2012年11月第22期
引用格式: 杨坚,陈荷娟,谭菊琴,等. 引信新型超声压电换能器及其基阵设计[J]. 中国科技论文在线精品论文,2012,5(22):2110-2116.
 
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