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. 10, 1997
Filed:
Jun. 28, 1995
Applicant:
Inventor:
Hiroshi Kushihara, Nagano-ken, JP;
Assignee:
Tamagawa Seiki Kabushiki Kaisha, Nagano-ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B / ; G01R / ; G05B / ;
U.S. Cl.
CPC ...
32420725 ; 32420716 ; 340661 ;
Abstract
The present invention relates to a digital angle detection system, or more particularly, to provide a digital angle output that is stable and the least affected by a cable length or the like. A digital angle detection system of the present invention uses a phase signal [sin(.omega. t-90.degree.-.theta.)] produced by synthesizing a phase-shifted resolver signal cos.theta..multidot.sin(.omega. t-90.degree.), which is 90.degree. out of phase with one resolver signal cos.theta..multidot.sin.omega. t, with the other resolver signal sin.theta..multidot.sin.omega. t.