盐城工学院本科生毕业设计说明书( 2011)毕业设计说明书电动汽车仪表控制系统的设计专业电气工程及其自动化学生姓名班级学号指导教师完成日期2011年6月5日电动汽车仪表控制系统的设计摘 要：设计了一款基于CAN总线的汽车仪表控制系统。该汽车仪表控制系统主要由专用电源芯片、单片机STC89C52、CAN独立控制器SJA1000、CAN收发器PCA82C250、光耦芯片6N137、MAX232电平转换芯片等元器件组成。专用电源芯片用于为整个系统提供稳定电源，汽车各个目标电气节点可以通过CAN总线将参数传输给单片机STC89C52 ，单片机STC89C52主要负责分析处理数据，并通过液晶显示相关信息。系统还可通过RS232把单片机系统的相关数据上传给PC机来进一步对数据的分析或对数据的存储。系统使用CAN总线实现显示信息的传送，共享车上其它模块处理的信息，使车内布线简单、传输及显示信息可靠、仪表体积小、系统扩展能力强、实时性好、精确度高、显示信息全面直观。关键词：仪表；CAN总线；单片机The Design of Electric Vehicles instrumentation Control SystemAbstract: This study was undertaken to design an instrumentation control system based on CAN bus. The control system mainly consists of special power supply module, single-chip computerSTC89C52, CAN independent controller SJA1000, CAN transceiver PCA82C250, Light-coupler 6N137, and MAX232 level transition chip and so on. Special power supply chip is used for supplying stable power for the whole system, CAN bus is responsible for transmitting data needed by display system to the Microprocessor STC89C52, STC89C52 is mainly responsible for the analysis of data processing, and through the LCD related information. The whole system can upload relevant data of the single-chip computer system to the PC which can analyze the data or the data storage further through RS232. The system has realized the share of information of the electric vehicle by the CAN bus, which make the layout of the electric vehicles wire become simple, decrease the dependence of instrument to wires, and increase the stability of the electric vehicle.Key Words: Instrumentation; CAN bus; Single-Chip computer盐城工学院本科生毕业设计说明书( 2011)目 录1. 概 述.11.1 课题研究背景及意义.11.2 本课题在国内外的研究概况.11.3 本课题研究内容.12. 总体方案设计.22.1 系统的功能与要求.22.2 系统组成及介绍.23. 车用仪表控制系统的硬件设计.53.1 单片机最小系统.53.2 RS-232串行通信接口电路. .73.3温度传感器及其硬件接口电路设计.93.4光电测速传感器及其硬件接口电路设计.103.5 液晶显示模块硬件设计.113.6 CAN通信原理及其实现.133.7电源电路硬件电路设计.184. 车用数字仪表系统的软件设计.184.1 开发语言简介.184.2 软件总体设计.184.3 部分模块程序设计介绍.195. 系统安装与调试.215.1 系统硬件调试.215.2 系统软件调试.226. 结束语.23参考文献.25致 谢.26附 录 . 26附录1：程序清单.28附录2：设计图纸.37附录3：元器件目录表.39电动汽车仪表控制系统的设计1. 概 述1.1 课题研究背景及意义汽车走过了100多年的发