Inspection of Metallic Plates Using a Novel Remote Field Eddy Current NDT Probe

Design Considerations for the Remote Field Eddy Current Probe for Inspecting Ferromagnetic Flat Structures

“…A field usable prototype RFEC probe is currently being developed at Amtak, Inc. Previous publications [1][2][3] have demonstrated some of the FEM data and the feasibility of using the RFEC probe for inspecting ferromagnetic flat plates. Recently the sarne technique has also been extended to inspect thicker aluminum structures.…”

“…The phase difference between the exciter and sensor signals is indicative of the defect dimensions. This same idea has been applied to the design of a new RFEC probe for inspecting flat ferromagnetic structures [1][2][3] and thick aluminum plates [4].…”

Design of a lock-in amplifier integrated with a coil system for eddy-current non-destructive inspection

“…The detection of defects such as cracks in critical metal structures and the assessment of the condition of metallic water mains are commonly performed by using Eddy-current nondestructive inspection (NDI) [1][2][3][4][5][6][7]. In this technique, a coil excited with alternating current, called driver coil, is placed above the metal component in which eddy currents are induced.…”

Thick-Walled Aluminum Plate Inspection Using Remote Field Eddy Current Techniques

“…In the case of metal plates the following four steps have been taken to force the energy to traverse the plate twice [2]:…”

“…In recent few years, it has been successfully extended to the inspection of metallic plates [1], [2]. A prototype of such a probe designed for inspecting thick alumirrum plate has been designed and evaluated using finite element models.…”