Method and apparatus for determining angular velocity from two s

Details Method and apparatus for determining angular velocity from two s Method and apparatus for determining angular velocity from two s

1987-11-06

1989-03-21

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Electrical speed measuring

324165, G01P 342

Patent

active

048147010

ABSTRACT:
A method and an apparatus for determining angular velocity from two voltage signals which are produced by an angle transmitter (1) having a sinusoidal function with respect to the angle of rotation of a rotatable member and are shifted in phase by 90 angular degrees. The amount and sign of the angular velocity (.omega.) are determined by the division of the derivative of a first voltage signal with respect to time by the second voltage signal when said second voltage is above zero. In that signal range in which the second voltage signal passes below zero, the derivative of the second voltage signal with respect to time is divided by the first voltage signal. Alternatively, the amount of the angular velocity (.omega.) is determined from the vector sum of the derivatives of the two voltage signals with respect to time. The sign of the angular velocity is determined from the two voltage signals and their derivatives.

REFERENCES:
patent: 3860869 (1975-01-01), Parks

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