Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Phase comparison
Patent
1985-04-08
1987-02-17
Tokar, Michael J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Phase comparison
324 77A, 324 77B, 324121R, G01R 2500
Patent
active
046442685
ABSTRACT:
Apparatus and method for extracting the fundamental component of a complex waveshape (E.sub.T) and for determining the magnitude (V) and phase .theta. of the fundamental component are disclosed. The complex waveshape is converted into digital data relative to a reference signal (E.sub.R) and the in-phase (x.sub.1) and quadrature (y.sub.1) components of the fundamental component are determined by a graphical Fourier analysis of the digital data so that the magnitude and phase of the fundmental component relative to the reference signal (E.sub.R) can be determined.
REFERENCES:
patent: 4015262 (1977-03-01), Etcheverry
patent: 4054785 (1977-10-01), Lehmann
patent: 4118666 (1978-10-01), Bernstein
patent: 4321565 (1982-03-01), Ward
patent: 4410970 (1983-10-01), Law
patent: 4536760 (1985-08-01), Navarro
patent: 4563637 (1986-01-01), DeBortoli
Hartmann Joseph P.
Malka Jacob H.
Allied-Signal Corporation
Cuoco Anthony F.
Massung Howard G.
Protigal Stanley N.
Tokar Michael J.
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