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. 16, 1992
Filed:
Dec. 17, 1990
Applicant:
Inventors:
Bertil Hoffman, Kolback, SE;
Sverker Nidmark, Vasteras, SE;
Jan Palmquist, Vasteras, SE;
Jarl Sobel, Vasteras, SE;
Assignee:
Asea Brown Bovert AB, Vasteras, SE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B / ; G01R / ;
U.S. Cl.
CPC ...
324209 ; 324225 ;
Abstract
The content of even harmonics is used in both a method and apparatus for the detection of the disturbing static and quasi-static magnetic fields effects in measurement systems using force and torque transducers operating with magnetoelastic effect. The even harmonic content corresponds to the degree of static and/or quasi-static magnetization and is an input signal to a regulator the aid of the direct current in, for example, a separate winding, reduces the static and/or quasi-static magnetization to zero.