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《China Measurement & Testing Technology》 2008-02
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Research of measuring containing water ratio in crude oil based on multi-electrode capacitance sensor

GAO Xiao-ding1,GAO Peng2,WANG Xu1(1.College of Mechanic Electrical Engineering,Xi'an Polytechnic University,Xi'an 710048,China; 2.College of Automation and Information Engineering,Xi'an University of Technology,Xi'an 710048,China)  
A Multi-electrode capacitance sensor for measuring containing water ratio in crude oil and its circuit was designed.The multi-electrode capacitance sensor was designed for the structure of combining.By setting up the mathematic model of the measuring method,the function of the changing rate of containing water ratio in crude oil and the equivalent capacitance of multi-electrode capacitance sensor were achieved.An experiment to contrast the measuring containing water ratio in crude oil with pent-electrode capacitance sensor and mono-electrode capacitance sensor has been carried out and proved that comparing with the result of experiments,the precisions of fifth-electrode capacitance sensor in measuring the containing water ratio in crude oil has been greatly improved.Furthermore,whether the containing water ratio in crude oil is high or low,the measuring result by using fifth-electrode capacitance sensor is stable.
【Fund】: 陕西省教育厅自然科学基金项目(07JK249)
【CateGory Index】: TP274
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