基于FPGA和SHT21传感器的温湿度测量系统的设计

Temperature and Humidity Measurement System Based on FPGA and SHT21

设计了一种以XC2S50型现场可编程门阵列(FPGA)和SHT21温湿度传感器为核心的数字温湿度测量系统;利用FPGA为核心实现对数字式温湿度传感器SHT21的通信控制,测量的数据通过上位机软件进行显示;系统设计使用VHDL语言设计,实现了性能和成本的最大平衡;测试结果表明,本系统不仅能够准确的测量出实时温湿度数据,还能快速反应周围温度环境的实时变化,并且达到了系统温度精确度要求的0.001℃。

The paper report a digital temperature and humidity controller based on XC2S50 Xilinx Field Programmable Gate Array and SHT21 temperature and humidity sensor that uses the company＇s XC2S50-5TQ144 as the core to realize the SHT21 sensor of communica- tion control, measurement data for display through the PC software. System design using VHDL, achieved the greatest balance of perform- ance and cost. The results show that the system can not only accurately measure the real--time temperature and humidity data, hut also quick response real-- time changes in ambient temperature environment, and to achieve the required accuracy of the system temperature is 0. 001.