一种新型的相对湿度测量仪设计

Design of a Novel Relative Humidity Instrument

基于干湿球测量相对湿度的原理,引用IAPWS-IF97标准,考虑风速对干湿表系数的影响,设计了一种基于单片机的相对湿度测量仪。介绍了包括单片机、温度传感器及液晶显示模块的选型,给出了硬件电路原理及其软件流程。该测量仪具备实时湿度显示及查询功能,具有精度高、可靠性高和使用方便等优点,有较好的应用前景。

A new relative humidity instrument via single chip microprocessor is developed, which is based on psychomotor principles, the IAPWS-IF97 Standard and relations between psychometric coefficient A and wind velocity. The measuring device is introduced, such as single chip microprocessor, temperature sensor and LCM, with schematic diagram of instrument and flowchart of software. This measuring device has the functions of real-time display and query. It has many advantages of user-friendliness, high accuracy and reliability. It has a good application prospect.