Effective value measuring apparatus

Details Effective value measuring apparatus Effective value measuring apparatus

1979-03-23

1980-08-19

Wise, Edward J.

Boots, shoes, and leggings

364487, 324 76R, 364807, G01R 2900, G06G 762

Patent

active

042187362

ABSTRACT:
A signal to be measured and a triangular signal are applied to a first mean square value circuit, in which they are added together, full-wave rectified and smoothed and, at the same time, the triangular signal and a measured output are provided to a second mean square value circuit, in which they are added together, full-wave rectified and smoothed. The outputs from the first and second mean square value circuits are subtracted one from the other in a subtractor to obtain the measured output, with the triangular signal component removed. The measured output is applied to the second mean square value circuit to derive therefrom as a measured output an effective value that the root mean square value of the signal to be measured have been extracted.

REFERENCES:
patent: 2871447 (1959-01-01), Hall
patent: 2970261 (1961-01-01), Zoll
patent: 3205347 (1965-09-01), Wright
patent: 3423578 (1969-01-01), Platzer, Jr. et al.
patent: 3488482 (1970-01-01), Ley
patent: 3743949 (1973-07-01), Engel et al.
patent: 3840813 (1974-10-01), Allen et al.
patent: 4006348 (1977-02-01), Ochiai et al.
patent: 4073008 (1978-02-01), Andow et al.

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