Paddlewheel speed correction

Electricity: measuring and testing – Electrical speed measuring – Including speed-related frequency generator

Reexamination Certificate

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Details

C324S166000, C702S142000

Reexamination Certificate

active

11475829

ABSTRACT:
A speed sensor for a marine vessel includes a correction circuit to correct any sensor non-linearities so that the sensor produces an output with a pulse stream having a constant pulse rate, and reduces the pulse-to-pulse variations of the pulse stream. The circuit can standardize the pulse stream to have a frequency corresponding to a standard rate.

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patent: RE33982 (1992-07-01), Boucher
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patent: 5369360 (1994-11-01), Amyot
patent: 5544076 (1996-08-01), Wiggerman et al.
patent: 5606253 (1997-02-01), Boucher et al.
patent: 2084328 (1982-04-01), None

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