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Capacitance probe for detection of anomalies in non-metallic plastic pipe

United States Patent

November 23, 2010
View the Complete Patent at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
The disclosure relates to analysis of materials using a capacitive sensor to detect anomalies through comparison of measured capacitances. The capacitive sensor is used in conjunction with a capacitance measurement device, a location device, and a processor in order to generate a capacitance versus location output which may be inspected for the detection and localization of anomalies within the material under test. The components may be carried as payload on an inspection vehicle which may traverse through a pipe interior, allowing evaluation of nonmetallic or plastic pipes when the piping exterior is not accessible. In an embodiment, supporting components are solid-state devices powered by a low voltage on-board power supply, providing for use in environments where voltage levels may be restricted.
Mathur; Mahendra P. (Pittsburgh, PA), Spenik; James L. (Morgantown, WV), Condon; Christopher M. (Morgantown, WV), Anderson; Rodney (Grafton, WV), Driscoll; Daniel J. (Morgantown, WV), Fincham, Jr.; William L. (Fairmont, WV), Monazam; Esmail R. (Morgantown, WV)
The United States of America as represented by the United States Department of Energy (Washington, DC), N/A (
12/ 844,986
July 28, 2010
GOVERNMENT INTERESTS The United States Government has rights in this invention pursuant to the employer-employee relationship of the Government to the inventors as U.S. Department of Energy employees and site-support contractors at the National Energy Technology Laboratory.