An EMAT Array for the Rapid Inspection of Large Structures Using Guided Waves

Abstract

A novel EMAT array system for the rapid inspection of steel plate‐like structures using guided acoustic waves is described. Issues considered include the choice of guided wave mode, the design of suitable array elements, the layout of elements in the array and the instrumentation required. Results are presented from a variety of plate specimens that illustrate the sensitivity of the system to artificial defects, the effect of generalized corrosion on the test piece and the effect of plate thickness.