Inductive measurement of metallic cylindrical shells

The thickness of thin cylindrical copper shells of radius a and thickness D(D/a < 0.15) were measured by means of an inductive measurement. The samples were obtained by chemical reduction of thick copper pipes. The conductivity of the cylinders was measured by a standard four-terminal technique....

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Bibliographic Details
Published in:IEEE transactions on magnetics 1978-11, Vol.14 (6), p.1171-1174
Main Authors: Octavio, M., Callarotti, R., Schmidt, P.
Format: Article
Language:English
Subjects:
Chemicals
Coils
Conductivity measurement
Equations
Geometry
Magnetic field measurement
Magnetic fields
Mechanical variables measurement
Thickness measurement
Voltage
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Summary:The thickness of thin cylindrical copper shells of radius a and thickness D(D/a < 0.15) were measured by means of an inductive measurement. The samples were obtained by chemical reduction of thick copper pipes. The conductivity of the cylinders was measured by a standard four-terminal technique. The agreement between the value of thickness measured mechanically and the value obtained from inductive measurement is of the order of ±2 percent. Thicker brass shells were measured and these results compared with theory. The extension of the inductive measurement to cylindrical shells covering cylinders with a finite conductivity is also discussed.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.1978.1060022