Device for production of a tachometry signal of infinite resolut

Details Device for production of a tachometry signal of infinite resolut Device for production of a tachometry signal of infinite resolut

1986-12-16

1988-12-20

Pellinen, A. D.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

361240, G01P 348

Patent

active

047927542

ABSTRACT:
A device for the production of a tachometry signal of infinite resolution and without ripple from an inductive position sensor. The sensor is fed by a sinusoidal reference signal and supplies two phase signals. A resistance-capacitance circuit tuned to the frequency of the reference signal is fed by the two phase signals of the sensor and supplies a sinusoidal signal whose phase angle is proportional to the rotation of the sensor. This signal is then digitized and processed by digital phase comparators and low-pass filters before differentiation. This includes the use of particular digital phase comparators, each associated with a particular return to zero detector, to produce by a storage flip-flop and an electronic switch, the outgoing tachometry signal with the aid of a single differentiator with a device for elimination of discontinuities.

REFERENCES:
patent: 3501651 (1970-03-01), Cottrell
patent: 4011440 (1977-03-01), Steglich
patent: 4703391 (1987-10-01), Franzolini

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