Abstract
In this paper a new method of estimating the width of an air layer and its position in a long distance parallel plate acrylic resin condenser by measuring capacitance while changing the size of supplementary plate electrodes is proposed and the usefulness of this method is discussed. The supplementary plate electrodes are placed on the same face of each measurement plate electrode and surround it.
At a given size and position of the air space, we obtained different measurement results of capacitance depending on the size of the supplementary plate electrodes. Using the data, we were able to form the approximate equations of capacitance relating the position and width of the air space. Then, substituting the measured values of capacitance in the condenser including an unknown air space to these equations, we obtained information to decide the position and width of the unknown air space.
As the result of this experiment, we found a great possibility to estimate the size of a different kind of dielectric and its position in a long distance parallel plate uniform dielectric condenser by changing the size of supplementary plate electrodes.
