Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1987-03-16
1989-05-16
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
204 1T, 204404, 324712, 324 57SS, G01R 2700
Patent
active
048313246
ABSTRACT:
A method and apparatus for analyzing the electrode impedance, in which an a.c. voltage with its frequency varied at intervals is applied between a pair of measuring electrodes dipped in the sample liquid, the complex a.c. impedance between the electrodes is measured at each frequency, the maximum value among absolute values of imaginary part of the measured impedance values is detected as the electrode polarization resistance, and the solution resistance of the liquid is calculated by subtracting the detected maximum value from the real part of the impedance corresponding to the maximum imaginary part.
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Ebersberger, "Impedance Matching Measurements with Sweep Generator Assembly Polyskop III SWOB." News From Rohde & Schwartz vol. 12, No. 53(1972) pp. 19-23.
Benadda et al, "A Measuring Device for the Determination of the Electric Permittivity of Materials in the Frequency Range 0.1-300 Mhz." J. Phys. E: Sci. Instrum vol. 15, No. 1 (Jan. 1982) pp. 32-36.
Asakura Yamato
Endo Masao
Matsuda Masami
Suzuki Kazumichi
Uchida Shunsuke
Eisenzopf Reinhard J.
Hitachi , Ltd.
Mueller Robert W.
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