基于AT89S51单片机出租车计费器的研究

Research on the Taximeter System Based on AT89S51MCU

中文关键词:  AT89S51单片机  A44E霍尔传感器  断电保存

英文关键词:AT89S51 MCU  A44E Hall sensor  power saving

中文摘要:

      采用数字电路与模拟电路设计的出租车计费器电路系统复杂、调试难度大、故障多，另外，其模式的转换采用机械开关，不易于实现计费器各项功能。采用AT89S51单片机进行系统设计，以少量的硬件与适当的软件相结合的设计方法即可实现计费器的功能。针对一般电流、电压互感器存在体积大和精度低的缺点，采用精度高、线性好、频带宽、响应快的A44E霍尔传感器进行车轮转动的信号采集。同时本设计增加了断电保存功能，并对液晶数字显示设置进行了改进，提高了计费器的准确性与合理性。

英文摘要:

      Taximeter circuit system that uses digital circuits and analog circuit is complex,difficult to debug,easy to go wrong and more.Further,because of its conversion adapting mechanical switch,various functions of the taximeter are difficult to achieve.AT89S51 microcontroller is proposed for this system,which uses less hardware and software to achieve taximeter functions.According to the disadvantages of bulky volume and low accuracy for the general electric current and voltage transformer,A44E Hall sensor with high accuracy,good linearity,frequency bandwidth,fast response,is used to collect the rotation signal of the wheels.This design also adds the power saving function，and improves LCD digital display setting.The accuracy and reasonableness of taximeter are enhanced.