Measurement of Oil-water Mixing Ratio Based on Resonant Cavity Microwave Filter Method
The accuracy of the existing microwave detection of oil-water mixing solution needs to be improved,so a microwave filtering structure based on the resonant cavity method is proposed.It can not only obtain the relative permittivity of the medium by calculating the square of the ratio of the resonant frequency of S11 when the pipeline is filled with different solutions and when it is filled with air,but also observe its S21 low-pass frequency point,and obtain its water content by calculating the function of the fitting curve.In the water content interval of 0%～100%,the obtained simulation results are that the maximum error is 4.6%,and the average error is only 0.8%.It is proved that the obtained water content error measured by this method is obviously small and has a good application prospect.
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