以AT89C52 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，输出采用8 段数码显示管。其中，总金额显示4位，单价及路程个显示两位。该系统满足集计费、单价和路程等多种计量功能为一体的出租车计价器的实用要求。-AT89C52 microcontroller with additional A44E Hall sensor as the center distance, to realize the taximeter statistics, output in 8-segment digital display tube. Among them, the total amount of display 4, unit price and the distance a display 2. The system is set to meet billing, unit price and distance measurement and other functions as one of the taxi meter and practical requirements.