一种集成式阻抗谱测量系统  

An integrated impedance spectroscopy measurement system

作　　者：王达[1] 王化祥[1] 崔自强[1] 高振涛 种楠楠[3] 

机构地区：[1]天津大学电气与自动化工程学院,天津300072 [2]华北石油采油工艺研究院,河北任丘062552 [3]南开大学信息科学技术学院,天津300071

出　　处：《传感器与微系统》2012年第12期94-96,100,共4页Transducer and Microsystem Technologies

基　　金：国家自然科学基金重大国际合作项目(60820106002);国家自然科学基金资助项目(61102096);国家自然科学重点基金资助项目(60532020);天津市自然科学基金资助项目(12JCYBJC19300;11JCYBJC06900)

摘　　要：针对传统阻抗测量仪器电路复杂、集成度低等问题,设计并实现了基于FPGA和AD5933的集成式阻抗谱测量系统。详细介绍了AD5933阻抗测量方法,FPGA系统架构及I2C IP Core工作机理。实验评估了系统的测量精度和信噪比等性能指标;通过对三元件生物阻抗模型的测量,进一步验证了系统测量的准确性。该系统具有体积小,功耗低,集成度高,抗干扰能力强,信噪比大于70 dB等特点,实现了阻抗谱测量系统的小型化。Aiming at problem of complicated circuit and low integration of traditional impedance measurement instruments ,an integrated impedance spectroscopy measurement system is designed and implemented based on FPGA and AD5933. AD5933 impedance measurement method, the FPGA system architecture and the I2C IP Core working mechanism are introduced in detail. The system measurement precision and signal-to-noise ratio are evaluated by experiments, and the system measurement precision is further verified by measuring the impedance of three elements model. The system has features of small size, low power consumption, high integration, strong anti- interference ability and its signal-to-noise ratio is above 70 dB. It is easy to realize the miniaturization of the impedance spectroscopy measurement system.

关 键 词：现场可编程门阵列 PicoBlaze微控制器 I2C总线 AD5933 阻抗测量 

分 类 号：TM934[电气工程—电力电子与电力传动]