电子系统抗干扰技术及应用.doc

摘 要 随着电子技术的不断进步，人们对电子产品的需求越来越多，从而对电子产品的要求也越来越高，这就促使人们想方设法提高电子系统的稳定性、可靠性。本文从电子系统干扰及抗干扰技术的角度出发，分析和探讨了现阶段抗干扰技术在电子系统中的应用。进一步对电子系统抗干扰技术提出了观点和看法。 电子系统的抗干扰措施有硬件措施和软件措施。在系统设计初期如果硬件抗干扰措施得当，可将绝大部分干扰拒之门外，但仍然会有少数干扰进入电子系统，故软件抗干扰措施作为第二道防线必不可少。本文介绍了几种形式的干扰以及解决方法，并以干扰对单片机应用系统及PLC控制系统的影响及其所采取的抗干扰措施为例进行阐述。其中通过合理的硬件电路设计，可以削弱或抑制绝大部分干扰。软件抗干扰技术是当系统受干扰后，使系统恢复正常运行或输入信号受干扰后去伪存真的一种辅助方法。此技术属于一种被动抗干扰措施，但是由于软件抗干扰设计灵活，节省硬件资源，操作起来方便可行，所以软件抗干扰技术越来越受人们的重视。一个成功的抗干扰系统是由硬件和软件相结合构成的。 关键词：电子系统；硬件抗干扰；软件抗干扰 Abstract With the continuous advancement of technology, there is growing demand for electronic products, and thus the requirements for electronic products have become more sophisticated, which prompted people to find ways to improve the stability of the electronic system. Electronic systems from jamming and anti-jamming technology point of view, at this stage of analysis and anti-jamming technology in the electronic system, and further anti-jamming technology for the electronic system and put forward a perspective view of an electronic system to further anti-jamming technology deeper study. Anti-interference measures are measures of hardware and software. If the hardware anti-jamming measures properly, the vast majority of interference can be excluded, but there would be a small number of interference with access to electronic systems, software, anti-jamming measures it as an essential second line of defense. In this paper, some type of jamming and some ways and means of solutions are introduced in detail, such as the distribution of signal flow, grounding, the design of how effectively avoid the jamming in printed circuit and some notices of power supply, and so on. A majority of the jamming can be eliminated or controlled by the logical hardware design. Software anti-jamming technology is subject to interference when the system after the system resumed normal operation or after the input signal to the pseudo-interference of a complementary method of seeking truth. This technology is a passive anti