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. 11, 2020
Filed:
Mar. 16, 2018
The Boeing Company, Chicago, IL (US);
Shahriar Khosravani, Everett, WA (US);
The Boeing Company, Chicago, IL (US);
Abstract
A method for measuring a contact resistance at an interface of an electrically conductive coating and a cross-ply surface of a composite layer having electrically conductive fibers. The method includes: placing a dielectric coating of a sensing pad in contact with the composite layer or with the electrically conductive coating on the cross-ply surface of the composite layer; electrically connecting first and second input terminals of a comparator to the sensing pad and to one side of a capacitor respectively; electrically connecting another side of the capacitor to a fixed resistance; electrically connecting the fixed resistance to an electrically conductive body inserted in a hole in the composite layer; supplying an alternating current to the electrically conductive body and to the fixed resistance; and outputting a characteristic voltage signal if an amplitude of the input signal at the first input terminal is at least equal to an amplitude of the input signal at the second input terminal.