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:
Apr. 09, 2013
Filed:
Jul. 16, 2012
Yanko K. Sheiretov, Waltham, MA (US);
Neil J. Goldfine, Newton, MA (US);
Todd M. Dunford, Waltham, MA (US);
Scott A. Denenberg, Somerville, MA (US);
David C. Grundy, Reading, MA (US);
Darrell E. Schlicker, Freeland, MI (US);
Andrew P. Washabaugh, Chula Vista, CA (US);
Karen E. Walrath, Arlington, MA (US);
Yanko K. Sheiretov, Waltham, MA (US);
Neil J. Goldfine, Newton, MA (US);
Todd M. Dunford, Waltham, MA (US);
Scott A. Denenberg, Somerville, MA (US);
David C. Grundy, Reading, MA (US);
Darrell E. Schlicker, Freeland, MI (US);
Andrew P. Washabaugh, Chula Vista, CA (US);
Karen E. Walrath, Arlington, MA (US);
Jentek Sensors, Inc., Waltham, MA (US);
Abstract
An apparatus for the nondestructive measurement of materials that includes at least two layers of electrical conductors. Within each layer, a meandering primary winding is used to create a magnetic field for interrogating a test material while sense elements or conducting loops within each meander provide a directional measurement of the test material condition. In successive layers extended portions of the meanders are rotated so that the sense elements provide material condition in different orientations without requiring movement of the test circuit or apparatus. Multidirectional permeability measurements are used to assess the stress or torque on a component. These measurements are combined in a manner that removes temperature effects and hysteresis on the property measurements. This can be accomplished through a correction factor that accounts for the temperature dependence.