Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Nonlinear
Patent
1985-08-06
1988-01-26
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Nonlinear
219110, 324127, 364483, G01R 1902
Patent
active
047219068
ABSTRACT:
Apparatus for determining the root-mean-square value of a pulsatile signal generated from a power line signal. Samples of the pulsatile signal are produced at predefined substantially equal sampling intervals beginning at substantially the onset of a pulse in said pulsatile signal and continuing thereafter for substantially the entire duration of a half period of the power line signal to generate corresponding sampled values. The sampled values are squared and accumulated, then divided by the total number of samples taken and accumulated during said half period to yield an intermediate value for which the square root is determined, resulting in the root-mean-square value of the pulsatile signal. g
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Clarke et al., "Principles and Theory of Wattmeters . . . ", Phys. E.: Sci. Instrum. (G.B.), vol. 15, 1982, pp. 645-652.
Hill et al., "Design of a Microprocessor-Based Digital Wattmeter", IEEE Trans. on Ind. Electr. & Contr. vol. IECI-28, No. 3, Aug. 1981, pp. 180-184.
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Matouka, "A Wide-Range, Digital Power/Energy Meter for Systems with Non-Sinusoidal Waveforms", IAS Annual Meeting 1980, Cincinnati, Ohio, Sep. 28-Oct. 3, 1980, pp. 838-849.
Ferguson Hugo S.
Hollinger David L.
Baker Stephen M.
Duffers Scientific, Inc.
Eisenzopf Reinhard J.
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