基于CPLD的相控声发射系统设计与实现  

Design and implementation of phase-controlled acoustic transmission system based on CPLD

作　　者：何斌[1] 许学忠[1] 张芳[1] 张宝国[1] 董明荣[1] 

机构地区：[1]西北核技术研究所,陕西西安710024

出　　处：《电子技术应用》2011年第5期45-48,共4页Application of Electronic Technique

基　　金：国家863计划项目(2010AA8092108)

摘　　要：提出一种新的增强声源指向性的电路设计方法,设计了基于复杂可编程逻辑器件(CPLD)的相控声发射系统。该系统由滤波采样、信号延时、按键显示、D/A转换等电路组成,通过控制声波在空气中波阵面的耦合,实现声波的相控发射。试验表明,该系统能够较明显地增强声源指向性。This article discusses a new circuit design to improve the direction of the sound source. Designing a phase-controlled system by the complex programmable logic device-based （CPLD）. The system comprises filtering and sampling circuit, signal delay circuit, key-press and display circuit, D/A transforming circuit and so on. The design is able to accurately control the delay of every array elements in order to control the sound wave coupling in the air. Test shows that the system can greatly improve the directional of the sound source.

关 键 词：指向性 CPLD 相控发射 延时 

分 类 号：TN492[电子电信—微电子学与固体电子学]