毕业设计：基于89s51单片机的出租车计价器系统设计.doc

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¹Ø¼ü´Ê£º89S51µ¥Æ¬»ú A44E»ô¶û´«¸ÐÆ÷ ¶Ïµç±£´æ 8¶ÎÊýÂëÏÔʾ¹Ü
Abstract: It is now the major cities in the taxi industry have universal automatic meter, meter technology development is a foregone conclusion. And some small cities not yet universal, but with increasing speed up urban construction, a symbol of urban landscape taxi industry will also accelerate development, and the popularity meter is no doubt, therefore, the future of the automobile market valuation is still potential .
The circuit of 89 S51 MCU as the center, additional A44E Hall sensor location and realize the Taximeter statistics, a brownout AT24C02 achieve in the system and when the system priced preservation time information, output by paragraph 8 of the digital display. The circuit design of the meter can not only realize the basic valuation, but also in accordance with the day, night, halfway to wait for price regulation, while also not denominated as a time clock to provide convenience for the drivers comrades.
Keywords: 89 S51 MCU A44E Hall sensor power preservation of digital display paragraph 8
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