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:
Mar. 15, 2022
Filed:
Aug. 06, 2019
Saudi Arabian Oil Company, Dhahran, SA;
Brian Jonathan Parrott, Thuwal, SA;
Sahejad Patel, Thuwal, SA;
Saudi Arabian Oil Company, Dhahran, SA;
Abstract
A system is disclosed for detecting holidays, e.g., defects, in surface coatings applied to metallic assets like a pipe. The system comprises a detection circuit with a test probe having a conductive tip which is moved along the coating during inspection and a DC voltage input signal generator which supplies a switched DC voltage input to the test probe. The detection circuit can be configured to operate using a low and/or high voltage switched DC input voltage signal. A measurement component comprising a sensing resistor and measurement tool is configured to measure a signal response of the detection circuit during inspection and detect holidays based on changes in the signal response caused by electrical properties of the coated surface. The detection circuit is configured such that the probe provides the only area of contact between the circuit and asset and enables detection of holidays without a separate ground connection.