基于虚拟仪器的温湿度测量系统设计与实现

Design and Implementation of Temperature and Humidity Measurement System Based on Virtual Instrument

温湿度测量系统是特殊要求实验室必备的测量仪器,传统的实验室温湿度测量装置是以单片机为核心,用数码管显示湿度值,根据不同的温湿度要求,通过硬件设定不同的调节终态,从而将实验空间的湿度调节到设定值。为了更好地了解特殊要求实验室的温湿度变化规律,传统的测试装置已经不能适应实验室的需要。利用虚拟仪器技术设计制作温湿度测控系统,使用LabVIEW和数据采集卡相互配合采集温湿度信号并输出控制信号,结果显示更形象直观,操作更方便,并且还可以较容易地实现功能扩展。

The temperature and humidity measurement system is a necessary equipment for special laboratory. The traditional metering equipment of laboratory temperature and humidity takes the SCM as core, uses digital tube to demonstrate humidity value, sets different final states according to different humidity requirements and through hardware, thus adjusting test spatial humidity to a definite value. In order to analyse well the temperature and humidity change rule of the special laboratory, the traditional testing device already could not meet the laboratory need. The Virtual Instrument technicis used to design the temperature and humidity control system, and the LabVIEW and the data acquisition card are adopted in a coordinated fashion to gather the temperature and humidity signal and outputs the control signal. The result demonstraties that the new installment is more vivid and direct-viewing, and the operation is more convenient, and the function expansion may be easily realized.