Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Demand – excess – maximum or minimum
Patent
1993-08-23
1995-03-21
O'Shea, Sandra L.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Demand, excess, maximum or minimum
32420718, 324102, 327 58, 327 94, G01R 1904, H03K 500
Patent
active
053999649
ABSTRACT:
A peak amplitude detector for use in a synchronized position demodulator associated with a linear variable differential transformer. The peak amplitude detector adjusts for phase shift in the transformer and maintains the full bandwidth of the transformer. The detector obtains the maximum positive or negative amplitude of the sinusoidal signal at one of the secondary windings of the transformer by first counting either a positive or negative half cycle of the signal and then while down counting one half of the counted half cycle sampling the amplitude of the sinusoidal signal. The sampling ends when the count reaches zero.
REFERENCES:
patent: 4599560 (1986-07-01), Sanford et al.
patent: 4627080 (1986-12-01), Debus, Jr.
patent: 4777629 (1988-10-01), Morris et al.
patent: 4847548 (1989-07-01), Lafler
patent: 4857919 (1989-08-01), Braswell
Technical Bulletin AN59-14 pp. 1-8 by Schaevitz Engineering "Linear Variable Differential Transformer Demodulation Techniques"; 1959.
Elsag International N.V.
Katterle Paul R.
O'Shea Sandra L.
Phillips R.
Rickin Michael M.
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