文档介绍：毕业论文
题目基于单片的监控系统研究
姓名学号
系(院) 班级
指导教师职称
二O一二年五月十三日
目录
1 引言 1
2 汽车行驶状态记录仪系统的设计方案 1
功能和技术指标 1
系统总体结构 1
3 系统硬件设计 2
记录仪的供电 2
信号采集模块 3
单片机模块 4
可编程逻辑器件 7
日历时钟芯片 9
液晶显示模块 13
信息的存储 15
4 系统软件设计 17
5 分析与总结 18
参考文献 19
谢辞 24
摘要
汽车行驶状态记录仪是一种安装在汽车上实现类似于飞机“黑匣子”功能的设备,它可以全程记录汽车行驶数据,并通过对所记录的行驶信息数据进行分析,从而对车辆的各种状况予以精确的掌控。
本课题主要研究基于单片机的汽车行驶状态记录仪系统设计,实现对汽车行驶过程中实时信息的采集、处理、传送和存储。首先,汽车内部霍尔传感器传过来的一对分差信号经过适当的变换变成一个脉冲信号提供给单片机系统,然后单片机系统将采集到的信息经过适当的运算处理之后存储起来并进行处理。另外,当汽车超速时,系统会发出警报,以提醒司机减速。本课题设计的汽车行驶状态记录仪可有效预防驾驶员违章驾驶、遏制重大交通事故,具有准确性、高效性和易用性等。
关键词:单片机;记录仪;数据采集;可编程逻辑控制
Abstract
Vehicle traveling data recorder is a kind of facility that install at the vehicle realizing the function that similar to airplane’s “black box”. It can write down the vehicle traveling data all the way, and analyze the data entered as well, thereby to handle all kinds of circumstances precisely that vehicle may happen.
This topic is mostly researching the system design of the vehicle traveling data recorder, which is based on the micro control unit (MCU), realize the collection, treatment, transmission and storage to the vehicle’s real-time information while driving. First, a differential signal passing from the internal Hall sensor of the vehicle through proper transform into a pulse signal providing to the MCU system. Then the SCM system will get the collected information puting and then store up as well as conducting. In addition, the system will alarm when the vehicle is speeding, to remind the driver to slow down. The vehicle traveling data recorder designed this topic can effectively prevent the driver from illegal driving, contain major traffic accident, which is accuracy, efficiency and ease-of-use, etc.
Key words: MCU; Recorder; Data acquisition; Programmable logic
1 引言
汽车行驶状态记录仪是能够记录和再现汽车行驶状态的一种数字式电子记录装置,它可以全程记录汽车的行驶数据,并通过对所记录的行驶信息数据的分析,对车辆的行驶状况予以精确的掌控。汽车行驶状态记录仪可有效预防驾驶员的违章驾驶,降低车辆的交通事故。早在20世纪70年代,欧共体就开始全面强制使用机电模拟式汽车行驶记录仪并使得交通事故率降低了30%~50%。90年代以来,美国、