基于单片机的铁路道口报警系统的研究与设计（设计） 大学论文.doc

目　录 中文摘要 1 英文摘要. 2 1 绪论 3 1.1 问题的提出 3 1.2 国内外研究现状 3 1.3 研究目的与意义 4 1.4 设计任务与要求 4 2系统总体方案设计 6 2.1 系统的整体平面示意图 6 2.2 系统的主要技术指标 6 2.3 系统工作的整体框图 7 3系统硬件设计 8 3.1 传感器 8 3.2 信号处理模块 10 3.3 中央处理模块 12 3.4 语音报警模块 15 3.5 栏木机驱动模块 18 3.6 键盘输入与数码管显示模块 20 3.7 电源模块 23 4系统软件设计 25 4.1 软件设计的主要步骤 25 4.2 系统软件的总体设计 25 4.3 列车断线检测模块 26 4.4 列车接近与到达检测处理 28 4.5 语音广播系统软件流程 30 4.6 栏木机控制模块流程 30 5系统抗干扰设计 32 5.1 系统抗干扰性设计原则 32 5.2 系统干扰源分析及硬件抗干扰措施 32 5.3 系统软件抗干扰措施 35 6总结与展望 38 致谢 39 参考文献 40 附录：系统硬件图 42 基于单片机的铁路道口报警系统的研究与设计 摘要: 在我国经济持续发展的今天，随着机动车辆的增加列车密度和运行速度的提高，道口安全。 关键词：道口安全，AT89C51单片机，报警系统 The Design based on the Microcomputer for the Railway Crossing Warning System Abstract: In the modern sustainable development of Chinas economy, with the increase of motor vehicles, the density and the increase of the running speed of the train, the railway crossing safety problem is becoming more and more important. If the railway crossing lacks strict security management, then malignant traffic accidents will happen easily, and this will pose a great threat to the safety of railway transportation. The railway crossing safety problems are both important and weak point, therefore devise a railway crossing alarm system to improve the security is very necessary. The paper first analyzes the significance of the subject, gives the block diagram of the whole system, schematic plan and related technical indicators based on the home and abroad research status. The hardware part of this topic selects AT89C51 MCU as the main control chip which has good universality and ideal price, then choose magnetic sensors on the wheels to get the vehicles message, use ISD4002 voice chip and LED display module to prompt notice the messages to the passing vehicles and pedestrians, especially, in order to improve the overall system security I increase the electric barrier machine. The software part of this topic firstly gives the overall block diagram of the system , and then followed by the introduction of the system break d