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:
Feb. 08, 1994
Filed:
Sep. 27, 1991
Applicant:
Inventors:
Assignee:
Daikin Industries, Ltd., , JP;
Primary Examiner:
Int. Cl.
CPC ...
G01R / ; G01R / ;
U.S. Cl.
CPC ...
324248 ; 505846 ;
Abstract
Output currents from a superconducting quantum interference device which corresponds to magnetic flux guided thereto are compared with a predetermined value which corresponds to a magnetic flux locking point so as to detect a direction of shift with respect to the magnetic flux locking point. A shift quantity is judged to determine whether or not it is large based upon a history of the shift direction. A variation value component of an estimate feedback quantity is varied by taking this history into consideration. The estimate feedback quantity is used to guide magnetic flux for compensating for variation in the magnetic flux which is guided to the superconducting quantum interference device.