摘要
该文研制了一种基于现场可编程门阵列(FPGA)和ARM的压电换能器阻抗测量仪,介绍了矢量伏安法的阻抗测量方法,从压电换能器的等效电路出发,分析了换能器阻抗测量方法。设计了基于FPGA的直接数字式频率合成(DDS)信号发生电路,阻抗测量前端和相敏检波电路。通过ARM系统实现了换能器等效参数计算和导纳圆显示。实验表明,该装置结构简单,测量精度可靠,满足工程应用。
An admittance measurement instrument of piezoelectric transducer based on FPGA and ARM was developed in this work.The principle of vector voltammetry for impedance measurement was introduced.Considering the equivalent circuit of piezoelectric transducer,the transducer impedance measurement method was analyzed.The DDS signal generating circuit based on FPGA and the phase sensitive detection circuit were designed.The equivalent parameter calculation and admittance circle display were realized by using the ARM system.The experimental result shows that the proposed device has the features of simple structure and reliable measurment accuracy,and can satisfy the requirements for engineering applications.
出处
《压电与声光》
CAS
CSCD
北大核心
2016年第2期337-340,共4页
Piezoelectrics & Acoustooptics
基金
国家自然科学基金资助项目(61263028)
作者简介
许丰灵（1990-），男，广东揭阳人，硕士生，主要从事嵌入式系统设计的研究。
赵秋明（1954-），男，广西桂林人，高级工程师，硕士生导师，主要从事无线通信技术、电路与系统的研究。
