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资料简介：
毕业设计-出租车计价器系统设计，共52页，11018字，附电路图及文献综述

摘要：现在各大中城市出租车行业都已普及自动计价器，所以计价器技术的发展已成定局。而部分小城市尚未普及，但随着城市建设日益加快，象征着城市面貌的出租车行业也将加速发展，计价器的普及也是毫无疑问的，所以未来汽车计价器的市场还是十分有潜力的。本电路以89S51 单片机为中心、附加A44E 霍尔传感器测距，实现对出租车计价统计，采用AT24C02 实现在系统掉电的时候保存单价和系统时间等信息，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、中途等待来调节单价，同时在不计价的时候还能作为时钟为司机同志提供方便。

关键词：89S51单片机；A44E霍尔传感器；断电保存；8段数码显示管

Design of Taximeter

Author: Zeng Xin Bo

Tutor: Liu Xu Hong

(Oriental Science ＆Technology College of Hunan Agricultural University, Changsha 410128)

Abstract: The taxi car trade has made automatic meter universal in the major big and middle cities recently, so the development of meter technology is definitely settled while some small cities have not. But with the fast speed of the urban construction, a symbol of urban the taxi car trade will also keep pace accelerately, so the popularity meter will become universal undoubtedly. As a result, the markets of the automobile valuation are quite potential in the future. The circuit of 89S51 MCU is regarded as the center and is attached to A44E Hall sensor location to fulfill checking the prices of the Taximeter statistics and the circuit of AT24C02 is used to conserve information such as solo price and system time when the system is out of power. The output adopts paragraph 8 of the digital display. The circuit design of the meter can not only finish the basic valuation, but also judge daytime, night and halfway to adjust price regulation .In the meanwhile, it could set prices as a clock in a different time, which is convenient for drivers.

Keywords: 89S51 MCU ; A44E Hall sensor power; Preservation of digital ;Display paragraph 8

目 录

摘要 …………1

关键词 ………1

1 引言………2

2 出租车计价器的设计内容……3

2.1 基本设计要求 …3

3 方案论证3

3.1 方案比较 ………3

3.2 确定方案 ………3

4 计价器系统设计……5

4.1 计价器工作原理 5

4.2 单片机系统总体设计 ………6

5 硬件设计6

5.1 单片机总体电路图设计……6

5.2 AT89S51单片机介绍………6

5.3 电源控制线路设计 …………7

5.4 里程计算、计价单元的设计 8

5.5 数据显示单元的设计………10

5.6 AT24C02 掉电存储单元的设计…………12

5.7 启动及清除电路12

5.8 按键单元的设计13

6 软件设计 ………13

6.1 软件设计………13

6.2 流程图…………18

7 设计总结…………20

参考文献……21

致谢…………22

附录…………23

资料文件预览：
共5文件夹，21个文件，文件总大小：1.90MB，压缩后大小：417.21KB

• 毕业设计-基于89S51单片机的出租车计价器系统设计
• 22-出租车计价器的设计
• PCB电路图
• 新建文件夹 (3)
• lww2.ddb  [210.00KB]
• lww2.Bkp  [216.00KB]
• Previous Backup of Sheet1.Sch  [13.75KB]
• Backup of Sheet1.Sch  [13.75KB]
• Backup of Schlib1.Lib  [437.00B]
• 新建文件夹 (2)
• lww.ddb  [234.00KB]
• lww.Bkp  [242.00KB]
• Previous Backup of lww.Lib  [828.00B]
• Previous Backup of Sheet1.Sch  [13.83KB]
• Previous Backup of Schlib1.Lib  [821.00B]
• Backup of lww.Lib  [826.00B]
• Backup of Sheet1.Sch  [13.83KB]
• Backup of Schlib2.Lib  [745.00B]
• Backup of Schlib1.Lib  [989.00B]
• 中期检查表.doc  [32.94KB]
• 原理显示器图电路图.dwg  [123.72KB]
• 说明书.doc  [497.50KB]
• 目录.doc  [25.00KB]
• 
  lilong0105 - 2013/3/9 20:03:11
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