Rate of change detection

Details Rate of change detection Rate of change detection

1979-04-30

1982-01-05

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307517, 307352, 328151, G01R 1900, H03K 500

Patent

active

043096638

ABSTRACT:
A method of monitoring the rate of change of a first signal which includes the steps of periodically sampling the first signal, generating a first reference signal which for each period differs from the sampled amplitude of the first signal by a predetermined amount, comparing the amplitudes of the first signal and of the first reference signal, and generating an output signal when the amplitude of the first signal crosses the amplitude of the first reference signal.
The invention also provides apparatus for monitoring the rate of change of a first signal which comprises means periodically to sample the first signal, means to generate a first reference signal which for each period differs from the sampled amplitude of the first signal by a predetermined amount, and means to compare the amplitudes of the first signal and of the first reference signal and to generate an output signal when the amplitude of the first signal crosses the amplitude of the first reference signal.

REFERENCES:
patent: 3600688 (1970-04-01), Booth
patent: 3958132 (1976-05-01), Livesay
patent: 4086651 (1978-04-01), Muir et al.
patent: 4132947 (1979-01-01), Welschedel et al.

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