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G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
G01N27/9006—Details, e.g. in the structure or functioning of sensors
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FR666228D1927-12-201928-12-19Perfectionnements à l'essai des matières magnétisables et en particulier des câbles métalliques
ExpiredFR666228A
(fr)
Dispositif servant à éliminer l'action nuisible des fréquences perturbatrices qui se produisent de façon parasite dans les installations électriques et électro-acoustiques