基于FPGA技术的出租车计价器设计

Designing of FPGA-based taximeter

所设计的出租车计价器系统以可编程逻辑器件FPGA为控制核心,附加一定外围电路组成,包括百米脉冲分频模块、计程模块、计价模块、数码管扫描译码模块共四个子模块,可以对车型、单价、起步价、起步里程数、超额加价值等参数进行修改.仿真结果表明,它可适用于不同地区、不同型号的出租车.

The designing of taximeters is implemented with a FPGA chip and peripheral circuits in four modules of l00-meter pulse frequency,mileage calculation, evaluation,and nixie tube scanning and decoding. Besides,the model, unit price, flag-fall price, mileage, extra added values are modified. Results show that the meter adapts to different taxicabs in different regions.