Eddy sensors for small diameter stainless steel tubes.

Skinner, Jack L. ; Morales, Alfredo Martin ; Grant, J. Brian ; Korellis, Henry James ; LaFord, Marianne Elizabeth ; Van Blarigan, Benjamin ; Andersen, Lisa E.

Sandia National Laboratories

关键词: Modifications;    Eddy Currents;    36 Materials Science;    Stainless Steels;    Simulation;   

DOI  :  10.2172/1030394
RP-ID  :  SAND2011-5892
RP-ID  :  AC04-94AL85000
RP-ID  :  1030394

美国|英语

来源: UNT Digital Library

【 摘 要 】

The goal of this project was to develop non-destructive, minimally disruptive eddy sensors to inspect small diameter stainless steel metal tubes. Modifications to Sandia's Emphasis/EIGER code allowed for the modeling of eddy current bobbin sensors near or around 1/8-inch outer diameter stainless steel tubing. Modeling results indicated that an eddy sensor based on a single axial coil could effectively detect changes in the inner diameter of a stainless steel tubing. Based on the modeling results, sensor coils capable of detecting small changes in the inner diameter of a stainless steel tube were designed, built and tested. The observed sensor response agreed with the results of the modeling and with eddy sensor theory. A separate limited distribution SAND report is being issued demonstrating the application of this sensor.