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

G - Physics

01

P

73/53

G01P 3/40 (2006.01) G01P 13/04 (2006.01)

Patent

CA 1189347

VELOCITY SENSOR AND METHOD OF PRODUCING A VELOCITY SIGNAL ABSTRACT OF THE DISCLOSURE 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.

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