基于FPGA的表皮阻抗检测系统设计  

Design of FPGA⁃Based Epidermal Impedance Detection System Metamaterial

作　　者：杨润 郝国栋 王泽宇 韩建宁[1] YANG Run;HAO Guodong;WANG Zeyu;HAN Jianning(School of Information and Communication Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学信息与通信工程学院,山西太原030051

出　　处：《测试技术学报》2024年第6期678-685,694,共9页Journal of Test and Measurement Technology

基　　金：山西省自然科学基金面上资助项目(202103021224201);山西省回国留学人员科研资助项目(2023-127);中北大学研究生创新科技立项(20221835)。

摘　　要：人体皮肤状态信息的评估与研究在现代生活中愈发重要,而实际应用又缺乏便捷的仪器设备能够直接反映表皮组织信息,因此设计了一种基于现场可编程门阵列(FPGA)的表皮阻抗测量系统,并对人体表皮的阻抗值进行了实验测量研究。本系统以FPGA处理器为控制核心,高精度阻抗转换芯片AD5933及其外围电路作信号采集功能,两者之间通过I2C总线协议来传输数据与控制信号,采集得到的数据经过FPGA处理器进行相应的校准和计算处理后,通过RS232串口传输至PC端上位机进行显示,实现对表皮阻抗信息的实时采集与显示。实验结果表明,该系统运行快速稳定,可以比较准确地测量表皮的阻抗值,实现实时观察阻抗值变化情况的功能。Since the evaluation and research of human skin state information is becoming more and more important in modern life,and the practical application lacks convenient instrumentation that can have a direct reflection of the epidermal tissue information,this paper designs an epidermal impedance measure⁃ment system and carries out certain experimental measurements of the impedance value of human epider⁃mis for research.The system takes the FPGA processor as the control core,the high-precision impedance converter chip AD5933 and its peripheral circuits as the signal acquisition function,and the data and con⁃trol signals are transmitted through the I2C bus protocol between the two,and the acquired data are pro⁃cessed by the FPGA processor through the corresponding calibration and computation,and then transmit⁃ted to the PC through the RS232 serial port to display in real-time,to realize the real-time acquisition of epidermal impedance information.Real-time acquisition and display of epidermal impedance information.Experimental results show that the system runs stably,can measure the impedance value of the epidermis accurately,and realizes the function of real-time observation of impedance value changes.

关 键 词：现场可编程门阵列(FPGA) AD5933芯片 阻抗检测 皮肤阻抗 

分 类 号：TN606[电子电信—电路与系统]