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6. Eddy currents
6.1 Principle and physical basis
6.1.1 Principle of eddy current detection
When a conducting body is placed in a magnetic field that varies in time or space, induced currents develop in a closed circuit inside it. These are known as Foucault currents (French physicist 1819-1868).
A coil carrying a variable current, such as an alternating current, generates such induced currents which, in turn, create a magnetic flux that opposes the generating flux, thereby modifying the impedance of the coil....
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Eddy currents
Radiography and related techniques
Bibliography
References
Optics
Thesis
- - http://www.sudoc.abes.fr
- LIEBEAUX (N.) - Contribution à la modélisation de capteurs electromagnétiques : Application au contrôle non destructif par courants de Foucault. - Université de Paris-Sud (2002)....
Standardization
French standards
Association française de normalisation AFNOR http://www.boutique.afnor.fr
Non-destructive testing. Recueil AFNOR 2003.
- Essais non destructifs - Qualification et certification du personnel END - Principes généraux. - NF EN 473 - 12.00
Penetrant testing
- Essais non destructifs - Examen par ressuage - Partie 1 : principes généraux. (A09-120) - NF EN 571-1...
Organizations
COFREND Confédération française pour les essais non destructifs. - http://www.cofrend.com
The American Society of non-destructive techniques. - http://www.asnt.org
Radiation protection regulations
Decree 2003-296 of March 31, 2003 on the protection of workers against the dangers of ionizing radiation.
Decree 2002-460 of April 4, 2002 on the general protection of people against the dangers of ionizing radiation.
Decree 2001-215 of March 8, 2001 amending Decree 66-450 of June 20, 1966 on the general principles of protection against ionizing radiation....
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