HTS SQUID System for Eddy Current Testing of Airplane Wheels and Rivets

Superconducting Quantum Interferometers for Nondestructive Evaluation

“…In “traditional” NDE, high-T c DC SQUID systems have demonstrated their superior capabilities for the inspection of metal plates, aircraft wheels and fuselage and pre-stressed concrete bridges [5,6,39,40,41,42]. The chosen measurement scheme depends on the NDE application: an eddy current excitation scheme and a narrowband lock-in readout scheme are used for the investigation of metal plates and aircraft parts, while measurements of static magnetic fields are efficient for monitoring magnetic flux leakage from ferromagnetic objects such as the pre-stressed steel tendons of concrete bridges.…”

Applications of High-Tc Superconductivity

“…The epitaxial oxide heterostructures were used in different types of SQUID microscopes (Faley et al, 2004) (Poppe et al, 2004); in a SQUID monitor for measuring the beam current of accelerator radioisotope ions (Watanabe et al, 2004(Watanabe et al, , 2010; for geomagnetic surveys (Chwala et al, 1999, Clem et al, 2001, Fagaly, 2006; for non-contact testing of semiconductor structures with a SQUID laser microscope (Daibo et al, 2002(Daibo et al, , 2005; in the NDE systems for eddy current testing of aircraft wheels and rivets (Grüneklee et al, 1997); for magnetic inspection of prestressed concrete bridges (Krause et al, 2002); for picovoltmeters (Faley et al, 1997b); and for the localization and identification of deep-seated artificial defects such as holes, slots and cracks in multilayer reinforced carbon fibre polymer panels by eddy current SQUID NDE (Valentino et al, 2002) and for magnetocardiography (MCG) measurements (Drung et al, 1995;Faley et al, 2002). Biomagnetic measurements are among those general-purpose applications for which the SQUID measurement systems are preferred due to their sensitivity and ability to measure vector components of magnetic fields.…”

Epitaxial Oxide Heterostructures for Ultimate High-Tc Quantum Interferometers

“…These requests, in turn, supported the further development of high-T c sensors: more than 20 types of high-T c DC SQUID magnetometers and gradiometers prepared by the high oxygen pressure sputtering technique are now available from Forschungszentrum Jülich GmbH. The epitaxial oxide heterostructures were used in different types of SQUID microscopes ) (Poppe et al, 2004); in a SQUID monitor for measuring the beam current of accelerator radioisotope ions (Watanabe et al, 2004(Watanabe et al, , 2010; for geomagnetic surveys (Chwala et al, 1999, Clem et al, 2001, Fagaly, 2006; for non-contact testing of semiconductor structures with a SQUID laser microscope (Daibo et al, 2002(Daibo et al, , 2005; in the NDE systems for eddy current testing of aircraft wheels and rivets (Grüneklee et al, 1997); for magnetic inspection of prestressed concrete bridges (Krause et al, 2002); for picovoltmeters (Faley et al, 1997b); and for the localization and identification of deep-seated artificial defects such as holes, slots and cracks in multilayer reinforced carbon fibre polymer panels by eddy current SQUID NDE (Valentino et al, 2002) and for magnetocardiography (MCG) measurements (Drung et al, 1995;Faley et al, 2002). Biomagnetic measurements are among those general-purpose applications for which the SQUID measurement systems are preferred due to their sensitivity and ability to measure vector components of magnetic fields.…”