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:
Jun. 23, 1992
Filed:
Feb. 06, 1991
Applicant:
Inventor:
Gunter Spahlinger, Stuttgart, DE;
Assignee:
LITEF GmbH, Freiburg im Breisgau, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01C / ;
U.S. Cl.
CPC ...
356350 ;
Abstract
A fiber optic interferrometer rotation rate sensor is reset by phase ramp via a digital control circuit using as demodulation signal within the control circuit a signal (d) that is statistically independent of all parasitic signals and originates from a modulation signal generator that includes a random number generator. A reversal of the phase modulator signal is provided in a statistically distributed manner to integral values of .pi./2 of the interferometer characteristic. The arrangement avoids deadband and removes scale factor nonlinearities, particularly at low rates of rotation.