出租車計價器系統(tǒng)設計


摘要：隨著人們生活節(jié)奏的加快，出租車已經成了城市交通的重要組成部分，為了解決伴隨而來的問題,一臺性能良好的出租車計價器是必要的。出租車計價器是乘客與司機雙方的交易準則，它是出租車行業(yè)發(fā)展的重要標志，是出租車中最重要的工具。它關系著交易雙方的利益。具有良好性能的計價器對司機和乘客來說都是很必要的。本系統(tǒng)是采用單片機進行的設計，具有功能強大，易實現(xiàn)，具有較高靈活性。本設計采用AT89S52單片機為主控器，以A44E霍爾傳感器測距，實現(xiàn)對出租車的多功能的計價設計，并采用AT24C01實現(xiàn)在系統(tǒng)掉電的時候保存單價等信息，輸出采用8段數(shù)碼顯示管。本電路設計的計價器不但能實現(xiàn)基本的計價，而且還能根據(jù)白天，黑夜和中途等待來調節(jié)單價。
關鍵字：計價器 ，AT89S52，基本計價，調節(jié)單價

 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  錄

中文摘要………………………………………………………………………1
Abstract………………………………………………………………………………1
引言…………………………………………………………………………2
1 系統(tǒng)工作原理……………………………………………………………………………2
1.1 功能說明…………………………………………………………………………2
1.2 基本原理……………………………………………………………………2
2 出租車計價器硬件設計………………………………………………………3
2.1 單片機最小系統(tǒng)單元………………………………………………………3
2.2 A44E霍爾傳感器檢測單元……………………………………………………4
2.3 AT24C01存儲單元……………………………………………………………6
2.4 鍵盤調整單元……………………………………………………………8
3 系統(tǒng)軟件設計………………………………………………………………………9
3.1 系統(tǒng)主程序…………………………………………………………………10
3.2 中斷程序………………………………………………………………………11
3.2.1 里程計數(shù)中斷程序………………………………………………………11
3.2.2 中途等待中斷程序………………………………………………………12
3.3 計算程序………………………………………………………………………12
3.4 顯示程序………………………………………………………………………12
3.5 鍵盤程序………………………………………………………………………12
4 結束語……………………………………………………………………………12
致謝………………………………………………………………………………13
參考文獻……………………………………………………………………………13