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:
Dec. 07, 2004
Filed:
Nov. 08, 2001
Richard B. Mignogna, Laplata, MD (US);
Kirth E. Simmonds, Clinton, MD (US);
Narendra K. Batra, Springfield, VA (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
A method and an apparatus are provided for measuring the thickness of a coating material using ultrasonic signals. A broad band of frequencies is transmitted by a transducer towards a layer of coating layer on a substrate and a trailing signal is received from the coating layer/substrate interface while a leading backscattered signal from a fluid/coating layer is gated out. The trailing signal is deconvolved into a set of frequencies. The resonant frequency of the coating layer is determined as the frequency with the greatest amplitude. The thickness of the material is calculated as a function of the resonant frequency of the coating layer.