天津职业技术师范大学
Tianjin University of Technology and Education
毕 业 论 专 业： 班级学号： 学生姓名： 指导教师：
二〇一四年六月
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文
天津职业技术师范大学本科生毕业论文
基于单片机的电子油门检测系统的设计
Design microcontroller-based electronic throttle
detection system
专业班级： 学生姓名： 指导教师： 学 院：
2014 年 6 月
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摘 要
论文的内容是基于单片机MSP430F149电子油门检测系统的设计，主要是根据电子油门的特性，将电子油门检测系统和MSP430F149单片机结合为一体，设计出一种基于MSP430F149单片机的电子油门检测系统，能够模拟的检测油门踏板的深度和发动机的转速。
论文简述了电子油门检测系统的构造及基本原理和单片机的原理及特性，对系统的设计进行了讨论，在能实现油门检测功能的基础上，设计出多种方案，通过多种方案对比，使用最佳的设计方案，把系统中各个模块统一在一起，模拟出一个电子油门检测系统，编写适合的程序，将油门踏板的位置通过显示屏显示出来，并通过pwm调速来控制直流电机的转速。
关键词：单片机;电子油门;MSP430F149;pwm调速
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ABSTRACT
The contents of this paper is about the design of MCU MSP430F149 based on electronic throttle detection system. It mainly use the characteristics of electronic throttle.It combine the electronic throttle detection systems and MSP430F149 in one design , And then design an electronic throttle detection system based on CU MSP430F149 .It can detect the depth of the accelerator pedal and the speed of the engine.
The paper outlines the structure and the basic principles of electronic throttle detection system,it also outlines the principles and characteristics of the MCU.This paper conducts a discussion on the design of electronic throttle detection system.Then it puts forward the overall composition of the system on this basis of achieving throttle detection.By comparing a variety of programs, the paper finally gets an optimal solution, and combines each module together of the system to simulate an electronic throttle detection system.At the same time it not only prepares for the procedure,but also display the position of the accelerator pedal .The speed of DC motor is controled by PWM.
Keywords:MCU;Electronic throttle;MSP430F149;PWM speed
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1 绪 论 ................................................................................................................................................ 6
1.1 引言 ........................................................................................................................ 6 1.2 国内外电子油门的发展现状 ................................................................................ 6 1.3 本文研究的意义 .................................................................................................... 6 1.4 本文研究的主要内容 ............................................................................................ 7 2 电子油门检测系统 ......................................................................................................................... 8
2.1电子油门的由来及发展过程 ................................................................................. 8 2.2电子油门检测系统的基本结构 ............................................................................. 9 2.3电子油门检测系统的工作原理 ........................................................................... 10 2.4本章小结 ............................................................................................................... 11 3 硬件总体设计 ............................................................................................................................... 12
3.1设计方案 ............................................................................................................... 12 3.2单片机模块 ........................................................................................................... 13 3.2.1单片机的选择 .................................................................................................... 13 3.2.2单片机的最小系统 ............................................................................................ 15 3.3液晶显示模块 ....................................................................................................... 17 3.3.1液晶显示屏的选择 ............................................................................................ 17 3.3.2液晶显示模块电路设计 .................................................................................... 18 3.4数据采集系统设计 ............................................................................................... 19 3.5 PWM直流电机调速 ............................................................................................ 19 3.6本章小结 ............................................................................................................... 20 4 软件设计和实物结果分析 ........................................................................................................ 22
4.1编写语言的选择 ................................................................................................... 22 4.2 编译软件介绍 ...................................................................................................... 22 4.3程序所实现的功能 ............................................................................................... 22 4.4实物结果分析 ....................................................................................................... 23 4.5本章小结 ............................................................................................................... 27 5 结 论 ............................................................................................................................ 29 6 参考文献 ........................................................................................................................ 31 7附录一 ............................................................................................................................. 32 8 致 谢 ............................................................................................................................ 41
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