Transducer guided wave electromagnetic acoustic

Details Transducer guided wave electromagnetic acoustic Transducer guided wave electromagnetic acoustic

2005-07-26

2005-07-26

Williams, Hezron (Department: 2856)

Measuring and testing

Vibration

By mechanical waves

C073S643000

Reexamination Certificate

active

06920792

ABSTRACT:
A guided wave electromagnetic acoustic transducer for detecting defects in moving metallic products such as rods, tubes and the like and which has coils energized by pulse of a few cycles of a high frequency alternating voltage which produces an alternating field in the product, the coils being alternately wound and connected in series and measuring dynamic acoustic stress that is a function of the radial distance from the center of the product being tested and produces a reading that is different than that showing a surface defect in the product.

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