摘要
研究电容测量原油含水率的原理，采用开关电容等变换电路，完成电容到频率的转换，经ＭＣＳ—５１单片机系统处理，在线测量０％～３１％和 ６０％～１００％原油含水率时的精度达到０．５％，含水率在３０％～６０％时的精度达到１％．本文介绍开关电容等变换电路的原理及特点，给出仪器的含水率测量实验结果．
The measurement principle of the water cut with capacitance sensor is presented. The translating circuit of switch capacitance is used for changing capacitance to frequency. The measuring signals are proceeded by the MCS-51 microcomputer system, the accuracy of measurement water cut in oil on-line (when measurement range are 0% ～30 % and 60% ～100 % ) is 0.5%, and the accuracy of measurement (when measurement range is30%～60% ) is 1 %. This paper describes the principle and characteristic of switch capacitance and other circuits, and gives the experimental result of the water cut in oil of instrument.
出处
《传感技术学报》
CAS
CSCD
2000年第1期44-48,共5页
Chinese Journal of Sensors and Actuators
关键词
原油
含水率测量仪
电容测量
switch capacitance measurement accuracy ingenuous probe
