PURPOSE: To make it possible to calculate the effective value and the max. value of an electric field, by providing each one set of electrodes in three directions or two directions mutually crossed at right angles in an AC electric field to synthesize the square sum of AC induction currents flowing between each electrodes in a circuit forming manner.
CONSTITUTION: In order to calculate the max. value of a space electric field, when the instantaneous values of currents flowing between electrodes A.A', B.B' and C.C' are respectively set to iA, iB and iC, the timewise max. value of a square sum i2=i2A+i2B+i2C may be calculated. As a measuring means, for example, a method, wherein each current components of iA, iB, iC detected by a current detecting resistor R are multiplied and added by an amplifier circuit having a square characteristic and the peak value thereof is indicated, can be employed. By this method, it becomes unnecessary that electrodes are provided in the direction at right angles relative to an electric field and three-dimensional electric field components are measured and added respectively separately while a measuring error based on the positional shift with the directions of each electric fields are not generated at all and three-dimensional electric field components can be measured simultaneously.
SUNAGA NORITAKA
NISHIYAMA FUMIHIKO
| JPS503380A | 1975-01-14 |