连续调速方式空调系统顶置控制器

论文编号:DQ195   论文字数:8747,页数:35

摘  要
 近年来，随着私家车数量的急剧增加，道路拥挤状况日益加剧，越来越多的人选择城市公交客车作为他们的出行代步工具。城市公共交通在我国城市交通中占有重要的地位, 是同我国城市居民生产、生活等活动密切相关的系统，而客车的空调系统好坏直接关系到乘客在乘坐时的舒适性。随着国内客车行业的发展，对空调系统的要求日益提高。单片机控制技术在客车电子中的应用日渐广泛，它显著提高了客车的智能化控制水平和安全性能。但是，目前客车空调大多还是以传统式的预置式车用空调，与汽车工业的发展不相适宜。而此次设计的顶置控制器将采用高性价比单片机PIC，运用嵌入式智能控制和通信总线技术，同时拥有无级风速变换、换新风等功能，保证在各种外界气候和条件下使乘客都处于一个舒适的空气环境中，使驾驶员保持清晰的视野，为安全驾驶提供基本保证。
关键词：PIC；总线技术；空调

Abstract
  In recent years, with the number of private cars increased dramatically and the increasing road congestion, more and more people select a city bus travel as their means of transport. Urban public transport in urban traffic in China plays an important role. And it also is the system that is closely related to China''''s urban residents with the production, life and other activities. The quality of the air-conditioning system is directly related to the passengers at the time of ride comfort. With the development of the domestic passenger car industry, the requirements for the air-conditioning systems increase. Single-chip bus electronic control technology in the increasingly wide range of applications, it significantly increased the level of intelligent control of passenger vehicles and safety performance. However, most of the current passenger car air-conditioning is pre-conventional car with air conditioning, and is not suitable for development of automotive industry. And the overhead of the controller design will be cost-effective single-chip PIC, the use of embedded intelligent control and communication bus technology, at the same time have the stepless speed change, replaced the wind and other functions, to ensure that the outside world in a variety of climate and conditions so that passengers are in a comfortable air environment, to enable the driver to maintain a clear field of vision, in order to provide the basic guarantee for safe driving.
Keywords：PIC; Bus-technology; Air-conditioning

目  录

摘  要 II
Abstract III
1  绪  论 1
2  总体方案设计 2
2.1  系统总体结构 2
2.2  系统硬件结构 2
2.3  系统总体软件结构 3
3  客车空调系统 4
3.1  客车空调系统的组成 4
3.2  客车空调系统的工作原理 4
4  PIC18F2580单片机 5
4.1  PIC18F2580系统硬件概况 5
4.1.1  内核及外围模块 5
4.1.2  内核结构的特点 6
4.1.3  中断机制 6
4.2  EUSART通信模块 7
4.3  定时器 8
4.4  模数转换器模块 9
4.5  ECAN模块 10
5  硬件功能模块及软件介绍 11
5.1  主要硬件功能模块简介 11
5.1.1  复位电路 11
5.1.2  DC/DC变换功能芯片34063 11
5.1.3  MAX485芯片 13
5.1.4  PCA82C250芯片 14
5.2  软件设计 15
5.2.1  系统控制要求 15
5.2.2  RS485通讯 16
5.2.3  CAN通讯 17
5.2.4  程序设计 18
5.2.5  风机驱动器模拟软件 25
6  系统的调试 26
6.1  硬件电路调试 26
6.2  软件调试 26
6.3  系统的改进方向 26
7  总  结 27
致  谢 28
参考文献 29
附录  车顶控制器原理图、PCB图及实物图 30