CIRCUIT FOR MEASURING COMPLEX PERMITTIVITY, DEVICE FOR MEASURING COMPLEX PERMITTIVITY, AND METHOD FOR MEASURING COMPLEX PERMITTIVITY

摘要

To provide a method for determining the cause of deterioration of electrolytic solution of a lubricating oil and a storage battery, and a method of measuring complex permittivity used to monitor the change of components in a food production line.SOLUTION: The embodiment of the present invention calculates a complex dielectric constant of dielectrics to be measured using the electrostatic capacitance Cand the complex dielectric constant of a dielectric substrate by calculating the electrostatic capacitance Cby assuming that the admittance in the atmosphere of this comb-shaped electrode substrate is measured and that the comb-shaped electrode simple substance is floating in the atmosphere, and by measuring the admittance in the state where the electrode surface of the comb electrode substrate is covered with a dielectrics of bigger thickness at least than the pitch of a comb-shaped electrode to be measured, using a comb-shaped electrode substrate on which a comb-shaped electrode whose electrode pitch is smaller than the thickness of the above-mentioned substrate is formed on one side of the dielectric substrate of a known complex dielectric constant.SELECTED DRAWING: Figure 9