单片机系统的抗干扰设计最终版.doc

2008届毕业设计说明书 单片机系统的抗干扰设计 系 、 部： 电信与信息工程系 学生姓名： 王祺 指导教师： 余斌 职称 讲师 专 业： 通信技术 班 级： 通信0801 完成时间： 2011-5 摘 要 近年来，单片机在工业自动化、生产过程控制、智能仪器仪表等领域的应用越来越广泛，大大提高了产品的质量，有效地提高了生产效率。但是，测控系统的工作环境往往复杂、比较恶劣，尤其是系统周围的电磁环境，这对系统的可靠性与安全性构成了极大的威胁。单片机测控系统必须长期稳定、可靠运行，否则将导致控制误差加大，严重时会使系统失灵，甚至造成巨大损失。 本论文首先介绍了和单片机干扰相关的一些基本知识，如干扰源，干扰途径，敏感元器件等；其次围绕干扰的三个因素展开单片机抗干扰设计的基本原则，包括对干扰源的抑制，对干扰途径的切断，对敏感器件抗干扰能力的提高等；接着向读者说明单片机抗干扰设计的两个基本面的研究办法，单片机硬件抗干扰与单片机软件抗干扰。文中将会通过对例子的解说来诠释单片机抗干扰的一些具体办法 关键词：单片机;应用系统 ;抗干扰 ;硬件设计; 软件设计 ABSTRACT In recent years, single-chip microcomputer in the industrial automation, process control, smart instrumentation applications, such as more and more widely, greatly improving the quality of the products, which improve the production efficiency. However, the working environment measurement and control system are often complex, relatively poor, especially in the electromagnetic environment around the system, which the system reliability and security poses a great threat. Single-chip measurement and control system must be long-term stability, reliable operation, otherwise the error will result in increased control, serious cause of system failure, or even result in huge losses. This paper first introduces and SCM-related interference with some basic knowledge, such as the interference source, interference channels, sensitive components, etc.; followed by the factors surrounding the interference of three anti-jamming design of the basic principles of SCM, including the source of interference inhibition, to interfere with pathways cut to sensitive devices such as anti-jamming capability; and then explain to the reader microcontroller anti-jamming design of two fundamental methods of research, single-chip microcomputer hardware, software, anti-jamming and anti - interference. The paper will be passed on some examples, explanations, and interpretation of some of the specific ways microcontroller