Measuring Ethanol/Gasoline Mixing Ratio Based on the Dielectric Properties
Ethanol can be used as an additive bio-fuel to flexible fuel vehicles at different mixing ratios. Con-tent of ethanol in blend fuel will affect the engines optimal ignition time and emissions. Currently, no accurate and inexpensive sensors are commercially available on vehicle to allow convenient measurement of the mixing ratio. In this paper, we studied on the relationship between mixing ratio and dielectric characteristics of ethanol/gasoline blends through experiment, and constructed detecting models of mixing ratio. For the first time, we proposed a new method that measuring Ethanol/Gasoline mixing ratio fast and accurately according to the dielectric characteristics. A unique permittivity sensor developed in a previous study was used in laboratory to measure the frequency-response data (gain and phase) of 14 kinds of ethanol/gasoline blends from 0 to 100％. Correlation between mixing ratio and frequency-response was analyzed. With partial-leastsquares (PLS) and stepwise regression, the mixing ratio detecting models have been constructed, flsquare values are higher than 0.999 while RMSE are lower than 0.008 for both training and validation of PLS regression models. Stepwise regression models significantly reduce the amount of data, also have good prediction results. Experimental results show that using the dielectric property and frequency response method to measure the mixing ratio of biofuel blend can get high precession and can meet the requirement of fast and real-time. The sensor used in this test has great potential for detecting the property of liquid materials.
Bio-Fuel Permittivity Mixing Ratio Frequency-Response
Xinming Xi Naiqian Zhang
College of Mechanical and Electronics Engineering, Northwest A&F University, YangLing, Shaanxi 71210 Department of Biological and Agricultural Engineering, Kansas State University, Manhattan, Kansas 66
国际会议
南昌
英文
1115-1119
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）