上车按键后开始计价。有实时时钟、单价、距离和总价钱显示。可以通过键盘修改单价（元/公里）和时间。有清除键用以清楚上次费用。利用LCD分别显示时间、单价、路程和费用。LED辅助显示说做操作。

主要方法：原理是，价格=速度 时间 单价；采用直流电机测速单元模拟出租车速度，通过光电耦合A/D转换进行速度采样，利用单片机的定时器/计数器定时和计数，用LED数码管或LCD显示总价和时间，并通过键盘进行单价设定及时间显示。

附加功能：当出租车速度低于某一设定值时，自动进行计数，当计时每达到1分钟时，价格按照1公里长度计。

0～9数字键；

B：开始计价；

C：清除数据；

D：（P）设置单价键，按一次后，再按数字键进行设置；

E: (T) 设置时间键，按一次后，再按数字键进行设置；

F/A：完成设置键。

-Pricing after the car keys. Real-time clock, unit price, distance, and display the total price. Can be modified by the keyboard unit (yuan/

Km) and time. A clear key to clear the last cost. Use LCD display time, respectively, unit price, distance and cost. LED

Auxiliary display that do operate.

Main methods: theory is that price = speed 　　unit of time　using DC motor speed element to simulate the taxi speed, through the

Optical coupling A/D conversion rate of sampling, using a microcontroller timer/counter timing and counting, or LCD with LED digital tube

Show total price and time, and set the keyboard using the unit price and time.

Additional features: when the taxi speed below a set value, the automatic counting, when the time of 1 minute each, the price according to

According to 1 km length of the meter.



0 to 9 number keys　

B: start pricing　

C: Clear data　

D: (P) set the unit price, press once, then press the number keys to set　

E: (T) set ti