A/D模块，压力测量系统设计。采用PIC16F877单片机，此型号有8路A/D转换通道，可将压力传感器输出的1--5V的电压信号转换为压力数值，并通过串口发送到上位机，通过串口调试助手即可查看数据。-A/D module, the pressure measurement system design. The use of PIC16F877 microcontroller, this model has eight A/D converter channel, the pressure sen