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Details van artikel 5 van 8 gevonden artikelen
| Titel: |
Electromagnetic Fault Detection on Non-ferrous Pipes |
| Auteur: |
Graneau, P. Swasn, S. A. |
| Verschenen in: |
International journal of electronics |
| Paginering: | Jaargang 8 (1960) nr. 2 pagina's 127-147 |
| Jaar: |
1960-02-01 |
| Inhoud: |
The development of electromagnetic' tests for pipes has in the past been based on time-consuming trial-and-error experiments for establishing the best combination of the three variables : energizing frequency, coil geometry and adjustment of phase suppression. Theoretical predictions become possible when the current distribution in the pipe is known. A simplified model, consisting of a circular thin shell (pipe) surrounded by a co-axial current circle (short coil), permits calculation of the current distribution to a sufficient degree of accuracy. An experiment is then described proving that, up to a certain test frequency, an actual pipe behaves like a shell with uniform current penetration. The new approach to electromagnetic pipe testing shows how to exploit the advantage of running inspection by virtue of the short signal pulse derived from a defect travelling through the coil system, which distinguishes localized faults from gradual changes in pipe dimensions and other physical properties. Tests can be made independent of unbalanced dynamically induced currents, the only disadvantage that could arise from movement of the test object. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 5 van 8 gevonden artikelen
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