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:
Jul. 18, 2017
Filed:
May. 12, 2015
Applicants:
Jiang Zhe, Copley, OH (US);
LI Du, Akron, OH (US);
Assignee:
THE UNIVERSITY OF AKRON, Akron, OH (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B 7/02 (2006.01); G01B 7/14 (2006.01); F01D 11/14 (2006.01); F01D 11/20 (2006.01); F01D 21/00 (2006.01); F01D 21/04 (2006.01);
U.S. Cl.
CPC ...
G01B 7/14 (2013.01); F01D 11/14 (2013.01); F01D 11/20 (2013.01); F01D 21/003 (2013.01); F01D 21/04 (2013.01); G01B 7/023 (2013.01);
Abstract
A high sensitivity inductive sensor for measuring clearance of a rotating blade tip includes a one or more of sensing coils. The sensing coils are formed of magnet wire, which is wound to form planar spiral coils. Each of the coils are coupled in series with a function generator, which applies an excitation signal thereto. Accordingly, based on the change in impedance of the coils, a clearance measurement, which identifies the distance between the coil and the tip of the rotating blade can be obtained using predetermined calibration curve values.