Method and apparatus for measuring the mean square value of an e

Details Method and apparatus for measuring the mean square value of an e Method and apparatus for measuring the mean square value of an e

1997-07-17

2000-05-16

Regan, Maura

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Nonlinear

324119, 327348, G01R 1500

Patent

active

060641932

ABSTRACT:
A method and apparatus for measuring the RMS value of an electrical signal. An electrical signal is converted to a digital signal. The digital signal is squared and low pass filtered to extract the DC component, the DC component being recognized as the mean-square of the signal. In use in a measurement device, the square root of the DC component is taken and displayed as the RMS value of the electrical signal.

REFERENCES:
patent: 3423578 (1969-01-01), Platzer
patent: 4001697 (1977-01-01), Withers
patent: 4389708 (1983-06-01), Baldock
patent: 4959608 (1990-09-01), Dillman
"An Economical Class of Digital Filters for Decimation and Interpolation" Eugene B. Hogenauer, IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. ASSP-29, No. 2, Apr. 1981, pp. 155-162.

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