Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Mechanical measurement system
Reexamination Certificate
2005-07-26
2005-07-26
Barlow, John (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Mechanical measurement system
Reexamination Certificate
active
06922641
ABSTRACT:
A system and method for monitoring defects in a structure are provided. The system includes a power supply for supplying an electric current to a monitoring area of the structure and a reference; a measurement circuit for measuring a potential drop across at least two contact points of the monitoring area and at least two contact points of the reference; and a processor adapted to determine a ratio of the monitoring area potential drop to the reference potential drop indicative of a percentage change in a thickness of the structure. The method includes the steps of supplying the current to the monitoring area and the reference; measuring a first potential drop across the monitoring area and the reference; and determining the ratio indicative of the percentage change in the thickness of the structure.
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“New Technique Monitors Pipeline Corrosion, Cracking,”, Strommen et al., Oil and Gas Journal, vol. 91, No. 52, Dec. 27, 1993, pp. 88-92.
Allison Peter
Batzinger Thomas
Lester Carl
May Andrew
Barlow John
Cabou Christian G.
General Electric Company
Lau Tung S.
Powell, III William E.
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