Velocity sensor and method of producing a velocity signal

Details Velocity sensor and method of producing a velocity signal Velocity sensor and method of producing a velocity signal

1982-02-11

1984-08-28

Krawczewicz, Stanley T.

Electricity: measuring and testing

Electrical speed measuring

Including speed analog electrical signal generator

324160, 250231SE, G01P 352, G01P 1300

Patent

active

044686170

ABSTRACT:
A high quality velocity signal is generated from an incremental position encoder, thus eliminating the DC tachometer in robot and machine tool closed loop control systems. The encoder signals are used to amplitude modulate the outputs of a high frequency oscillator. Two side band frequencies equal to the sum and difference of the encoder and oscillator frequencies are produced and converted to analog voltages and summed to yield a speed signal. This signal is continuous through zero rate and has a polarity determined by direction of rotation.

REFERENCES:
patent: 2659050 (1953-11-01), Honey
patent: 3453550 (1969-07-01), Kuck
patent: 3501651 (1970-03-01), Cottrell
Electrical Engineers' Handbook, Electric Communication and Electronics, 4th edition, 1950, John Wiley & Sons, Inc., p. 7-71.
Weaver: "A Third Method of Generation and Detection of Single Side Band Signals"-Proceedings of the IRE; 12/1956; pp. 1703-1705.

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