The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 28, 1984
Filed:
Feb. 11, 1982
Applicant:
Inventor:
Carl G Ringwall, Scotia, NY (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01P / ; G01P / ;
U.S. Cl.
CPC ...
324165 ; 324160 ; 2502 / ;
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.