基于CPLD的多路温度数据采集系统的设计

Design of Multi-channel Data Acquisition System Based on CPLD

提出了一种基于CPLD的温度数据采集系统的设计方案,介绍了系统软硬件、外围电路,芯片间电路连接和程序的设计方法,实现了温度信号采集、A/D转换、数据运算处理和控制数码管显示输出.仿真结果表明,本系统可将温度通过电压转换为可读的数字量,并且精度达到±0.5℃,能够满足15～50℃的一般温度采集要求.

A design method of data acquisition system based on CPLD（complex programmable logic device）was introduced in this paper.The hardware circuit buildup,connection of periphery circuits,and the codes of programs and graphs are also described.This system realizes whole circuit signal acquisition,A /D conversion,data operation process and controlled digital tube display output.The experimental result shows that this system can read the temperature conversion for the digital quantity through the voltage,and its accuracy reaches ±0.5 ℃,which can satisfy the temperature measurement requirements between 15℃ to 50℃.