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:
Aug. 08, 2017
Filed:
Nov. 21, 2014
Applicant:
Andrew Thomas, Westford, MA (US);
Inventor:
Andrew Thomas, Westford, MA (US);
Assignee:
OLYMPUS SCIENTIFIC SOLUTIONS AMERICAS INC., Waltham, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 27/90 (2006.01);
U.S. Cl.
CPC ...
G01N 27/9046 (2013.01); G01N 27/908 (2013.01);
Abstract
A rotary bolt hole eddy current inspection scanner using a differential eddy current probe, the circuitry of the scanner is embodied with a filtering circuit with three filters: FIR (Finite Impulse Response), a low pass filter, and a phase control filter (by means of a Hilbert transform). The result from a scan of a bolt hole is an output signal on an impedance plane exhibiting a 'backwards 6' shape of stable size when the scanner changes its rotating rate significantly.