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:
May. 04, 2010
Filed:
Jul. 07, 2007
Swapnil Patil, Thane, IN;
Nurul I. Hasan, Bodinayakanur, IN;
Suresh Krishna, Thuraiyur, IN;
Azhagar Raj M, Vilathikulam, IN;
Vivek Salunke, Bangalore, IN;
Swapnil Patil, Thane, IN;
Nurul I. Hasan, Bodinayakanur, IN;
Suresh Krishna, Thuraiyur, IN;
Azhagar Raj M, Vilathikulam, IN;
Vivek Salunke, Bangalore, IN;
Honeywell International Inc., Morristown, NJ (US);
Abstract
A robust solution for eccentricity issues in 360 degree rotary sensor application utilizing a hollow cylindrical magnet. A hollow cylindrical magnet design can be implemented to drive a parallel field magnetic sensor based on Hall/AMR technologies. Eccentricity variations of +/−0.46 mm on X and Y axes can be reduced by at least 20%, in turn improving the repeatability, linearity error and a correlation error associated with the sensor. For tilts of +/−3 degrees, the error can be reduced to at least 50% compared to a solid magnet, thereby increasing the repeatability and accuracy of the rotary sensor. The disclosed design improves linearity, is robust in vibration and improves reliability in lifecycle as the sensor configuration is less affected by wear and tear due to mechanical vibrations.