文档介绍：出租车行车信息系统的设计
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。出租车计价器是根据客户用车情况来自动显示车费的数字仪表,根据用车起步价、行车里程计费求得客户用车的总费用,并通过数码管显示相应的里程及金额。
我在本次设计中主要负责硬件工作。本电路以AT89S52单片机为中心,附加A44E霍尔传感器测距,实现对出租车计价,采用AT24C02 实现在系统掉电的时候保存单价,输出采用8段数码显示管,显示行驶总里程和总金额。
模拟出租车计价器设计:进行里程显示,预设起步价和起步公里数;行程按全程收费,有复位功能和启动功能,启动后,开始计价。我们采用单片机进行设计,可以用较少的硬件和适当的软件相互配合来实现设计要求,且灵活性强,可以通过软件编程来完成更多的附加功能,应用前景广阔。
关键字:出租车计价器 AT89S52单片机 A44E霍尔传感器断电保存 8段数码显示管
Abstract
Now the automatic mileage fare meter is popularized in each big or media-sized cities taxi profession, therefore the development of mileage fare meter technology has been a foregone conclusion. While in part small cities it’s underused, but speeding up day by day along with the urban construction, which will symbolize the urban appearance taxi profession that will accelerate to develop too .And mileage fare meter's popularization will also be without a doubt, therefore the future automobile mileage fare meter's market will have the great potential. The taxi mileage fare meter is a digital instrument which has the function to demonstrate fare according to the customer use of the car and charge customer the total fee according to start price of the using car together with the mileage, and then it can demonstrates the corresponding course and amount through 8 sections of digital tubes.
In this design, I am responsible for the part of hardware. This electric circuit takes AT89S52 monolithic integrated circuit as a center and that attaches A44E the Hall sensor range finder, which realizes the rental car valuation. The use of AT224C02 is to preserve the unit price when the present system power is failure. The output uses 8 sections of digital display tubes, demonstrating that goes the total course and the aggregate amount.
The design of simulated rental car mileage fare meter: the fare meter can demonstrate the course of rode, preinstall start price and start distance in kilometer.