出租车计价器系统设计论文.doc

出租车计价器系统设计


摘要：随着人们生活节奏的加快，出租车已经成了城市交通的重要组成部分，为了解决伴随而来的问题,一台性能良好的出租车计价器是必要的。出租车计价器是乘客与司机双方的交易准则，它是出租车行业发展的重要标志，是出租车中最重要的工具。它关系着交易双方的利益。具有良好性能的计价器对司机和乘客来说都是很必要的。本系统是采用单片机进行的设计，具有功能强大，易实现，具有较高灵活性。本设计采用AT89S52单片机为主控器，以A44E霍尔传感器测距，实现对出租车的多功能的计价设计，并采用AT24C01实现在系统掉电的时候保存单价等信息，输出采用8段数码显示管。本电路设计的计价器不但能实现基本的计价，而且还能根据白天，黑夜和中途等待来调节单价。
关键字：计价器 ，AT89S52，基本计价，调节单价

 Course Design Taximeter
Abstract：With the accelerated pace of life, a taxi has become an important part of urban transportation, in order to solve the attendant problems.Taximeter passengers and drivers sides of the transaction standards, it is an important symbol of the taxi industry is the most important tool for a taxi.It relates to the interests of parties to the transaction.Meter with a good performance for both drivers and passengers is essential.Design using microcontrollers, a powerful, easy to implement, with high flexibility to add additional features as needed benefits.This design uses AT89S52 microcontroller-based controller to A44E Hall sensor location, to achieve the pricing of multi-purpose taxi design and implementation using AT24C01 stored in the system when the power-down price and other information, 8-segment LED output displaytube.The meter circuit design can not only achieve the basic valuation, but also based on day and night and wait to adjust the price halfway.
Keywords：Meter； AT89S52；basic pricing；price regulation

目  录

中文摘要………………………………………………………………………1
Abstract………………………………………………………………………………1
引言…………………………………………………………………………2
1 系统工作原理……………………………………………………………………………2
1.1 功能说明…………………………………………………………………………2
1.2 基本原理……………………………………………………………………2
2 出租车计价器硬件设计………………………………………………………3
2.1 单片机最小系统单元………………………………………………………3
2.2 A44E霍尔传感器检测单元……………………………………………………4
2.3 AT24C01存储单元……………………………………………………………6
2.4 键盘调整单元……………………………………………………………8
3 系统软件设计………………………………………………………………………9
3.1 系统主程序…………………………………………………………………10
3.2 中断程序………………………………………………………………………11
3.2.1 里程计数中断程序………………………………………………………11
3.2.2 中途等待中断程序………………………………………………………12
3.3 计算程序………………………………………………………………………12
3.4 显示程序………………………………………………………………………12
3.5 键盘程序………………………………………………………………………12
4 结束语……………………………………………………………………………12
致谢………………………………………………………………………………13
参考文献……………………………………………………………………………13