Multifrequency Eddy Current Inspection with Continuous Wave Methods
نویسنده
چکیده
This paper describes the application of continuous wave, rnultifrequency eddy current methods to nondestructive inspection of materials. A generalized description of the technology is included, follow~d by s~me ~esults o~t~ined in_mul~i~requency_examination of tubing. A major advantage of multifrequency ~nspect1on 1s the a~1~1ty to d1scr1m1nate aga1nst unwanted test parameters. The discrimination process 1s effected by comb1n1ng the data from individual frequencies in a manner similar to simultaneous solution of multiple equations. r~ultifrequency tests are described showing how discrimination has been achieved against parameters such as probe motion, tube support plates and magnetic surface deposits.
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