电子学报 ›› 2018, Vol. 46 ›› Issue (2): 393-400.DOI: 10.3969/j.issn.0372-2112.2018.02.019

• 学术论文 • 上一篇    下一篇

基于统计分析的多协议单片机数据通信系统EFT抗扰度研究

钟志明1, 谭坚文1,2, 叶方伟1, 刘阳1, 曾德平1, 吴明达3   

  1. 1. 重庆医科大学生物医学工程学院, 省部共建国家重点实验室培育基地-重庆市超声医学工程重点实验室, 重庆市生物医学工程学重点实验室, 重庆市微无创医学协同创新中心, 重庆 400016;
    2. 重庆通信学院, 重庆 400035;
    3. 重庆电力设计院, 重庆 401121
  • 收稿日期:2016-09-12 修回日期:2017-01-12 出版日期:2018-02-25
    • 通讯作者:
    • 谭坚文
    • 作者简介:
    • 钟志明,男,1991年生于江西赣州,现为重庆医科大学生物医学工程学院硕士研究生,主要研究方向为超声医疗技术、医用电气设备电磁兼容.E-mail:zmzhongbs@126.com
    • 基金资助:
    • 国家自然科学基金 (No.81501615); 国家重大科学仪器设备研制专项 (No.81127901)

Research on EFT Immunity of MCU Data Communication System with Multi-protocol Based on Statistical Analysis

ZHONG Zhi-ming1, TAN Jian-wen1,2, YE Fang-wei1, LIU Yang1, ZENG De-ping1, WU Ming-da3   

  1. 1. Key Laboratory of Ultrasound Engineering in Medicine Co-Founded by Chongqing and the Ministry of Science and Technology, College of Biomedical Engineering, Chongqing Key Laboratory of Biomedical Engineering, Chongqing Medical University, Chongqing Collaborative Innovation Center for Minimally-invasive and Noninvasive Medicine Chongqing, Chongqing 400016, China;
    2. Chongqing Communication Institute, Chongqing 400035, China;
    3. Chongqing Electric Power Design Institute, Chongqing 401121, China
  • Received:2016-09-12 Revised:2017-01-12 Online:2018-02-25 Published:2018-02-25
    • Corresponding author:
    • TAN Jian-wen
    • Supported by:
    • National Natural Science Foundation of China (No.81501615); National Key Scientific Instrument and Equipment Development Project (No.81127901)

摘要: 电快速瞬变脉冲群(EFT)易通过电源线与通信线间的耦合干扰电子系统或设备正常运行,通信协议直接影响数据通信的EFT抗扰度.本文设计了包含I2C、USART、SPI和RS232四种数据通信协议的单片机数据通信系统,采用线缆耦合方式对其进行EFT抗扰度试验,基于数理统计方法分析了不同通信协议下系统EFT抗扰度.根据试验中获取的阈值电压数据,运用最大似然法估计假设模型参数,再通过卡方拟合优度检验以及汉南-奎因信息准则选取最优拟合分布模型Gamma模型,以研究不同通信协议下的EFT干扰阈值电压分布规律.对单片机通信协议而言,在一定波特率下,EFT抗扰度由低到高依次为I2C、USART、SPI、RS232.

关键词: 单片机数据通信系统, 线缆耦合, EFT抗扰度分析, 最大似然估计, 汉南-奎因信息准则, 数据通信协议比较

Abstract: The electronic system or equipment can be easily disturbed by Electrical Fast Transient (EFT) induced by coupling between power lines and communication lines. EFT immunity of data communication is directly influenced by communication protocol. Hence, a MCU data communication system which contains four kinds of data communication protocol including I2C, USART, SPI and RS232 was designed for EFT immunity test by means of cable coupling. The test data was analyzed by mathematical statistics method for obtaining the EFT immunity of MCU data communication system under different communication protocols. The optimal Gamma model is used for researching distribution law of EFT interference threshold voltage of MCU data communication system under different communication protocols, which was selected by chi-square goodness of fit test and Hannan Quinn information criterion through hypothetical models. The model parameters were estimated by maximum likelihood method based on test data. For MCU communication protocols, EFT immunity from low to high is in the order of I2C, USART, SPI, RS232 under the same baud rate.

Key words: MCU data communication system, cable coupling, EFT immunity analysis, maximum likelihood estimation, Hannan Quinn information criterion, comparison of data communication protocol

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