摘要
介绍一种利用电阻变化来测量微小压差的方法，文中阐述了微压计的工作原理、推导了电压表示数与电阻关系计算公式并进行了误差分析，最后进行了实验验证。结果表明：该微压计测量精度很高，实验数据与理论符合较好，而且参数——压力差与电压差之间是线性关系。此外，此种微压计的测量范围比较大，实验时做到3～1000Pa。
Introduced a micro-pressure measurement method by changing electric resistance.Illuminated the operating principle of micro-barometer,the formula deduction,the error analysis,and the experimental verification in the end.Results indicates that the micro-barometer has the characteristics of higher accuracy,the quite satisfactory between the experimental result and theory.Furthermore,the parameters between micro-pressure and electric voltage are linear relation.Besides,the equipment has a wider range of measurement,from 3 to 1000 Pa while experimentation.
出处
《节能》
2008年第5期23-25,共3页
Energy Conservation
关键词
微压计
电桥原理
U型管
micro-barometer
bridge principle
U-tube
