Boots – shoes – and leggings
Patent
1983-03-02
1986-09-16
Wise, Edward J.
Boots, shoes, and leggings
364492, G06F 1556
Patent
active
046126171
ABSTRACT:
A method and a device for monitoring instantaneous electrical parameters of a power distribution system under load utilizing digital control means. An analog signal equivalent to such a parameter is sensed and rated down for processing by solid state components. This signal is converted into a binary coded digital signal having n digits. A plurality of digital signals is sampled and squared values with a format of 2n digits are derived from each sample. The squared values of one sampling period are accumulated to a sum value composed of 2n+m digits and the square root comprising n+k digits of the sum is taken. This value is rescaled to a true root mean square value by performing k left shifts as an accurate measurement result. The core of such device is represented by a microcomputer with built-in analog-to-digital converter.
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Laplace, Jr. Carl J.
Williams Conrad F.
James J. L.
Powers F. W.
Siemens-Allis, Inc.
Wise Edward J.
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