基于数字压力计的通风干湿表检定方法研究

Research on Verification Method of Ventilated Psychrometer Based on Digital Pressure Gauge

本文主要讨论了用数字压力计进行通风干湿表检定的可行性。首先,进行了数字压力计和倾斜式微压计对指定风速点的测速对比实验和对通风干湿表通风速度测量的对比实验。并且引入了空气密度系数对不同环境条件下得到的实验数据进行了修正,使实验数据更加科学可靠。其次,用相关性度量分析的方法分析了实验数据的相关性,证明了用数字压力计替代倾斜式微压计进行通风干湿表检定的准确性更高。最后,根据实验结果对现行的JJG204-1980《气象用通风干湿表检定规》提出了补充计量标准器的修改意见,为进一步完善通风干湿表检定规程提供参考。

In this paper,the feasibility of verifying ventilated psychrometer based on digital pressure gauge is mainly discussed.Firstly,comparative experiments of digital pressure gauge and inclined manometer for measuring some certain wind speed and the ventilation speed of ventilated psychrometer are conducted.Moreover,the air density coefficients of different environmental conditions are introduced to correct the experimental data so that the experimental results can be more scientific and reliable.Secondly,the data correlation is analyzed by correlation measurement analysis,and it indicates that the ventilation speed of psychrometer measured by digital pressure gauge is more accurate than that of inclined manometer.Finally,based on the experimental results,a suggestion on adding a measuring standard device is proposed for JJG204-1980 Verification regulation of ventilated psychrometer for Meteorology,which provides a reference for further improvement of the regulation.