System and method for the non-destructive testing of elongate bodies and their weldbond joints
AssigneesEuropean Advanced Superconductor GmbH & Co. KG, Bundesanstalt fuer Materialforschung und-pruefung (BAM), Institut fuer Photonische Technologien E.V.
InventorsMarc Kreutzbruck, Gunnar Eidmann, Kai Allweins, Roland Mattheis
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Abstract
An arrangement for testing an elongated body 1 or a welded and bonded joint in the body for faults 60 has a device 4, 5 for production of an eddy current in the elongated body 1 or its welded and bonded joint. At least one magnetic field sensor 7 for sensing the magnetic field is provided on the elongated body 1 or the welded and bonded joint. The dimensions of the at least one magnetic field sensor 7 are equal to or less than the fault 60 to be investigated.
Claims19
An arrangement designed for testing a wire or a welded or bonded joint in the wire for faults, comprising:
- a device for production of an eddy current in the wire or the welded or bonded joint, and at least two magnetic field sensors for sensing the magnetic field on the wire or the welded or bonded joint, and
- an evaluation unit configured to indicate a phase angle, amplitude, signal length and a number of peak values from data relating to the sensed magnetic field as characteristics of a fault in the wire;
- wherein the at least two magnetic field sensors are located symmetrically with respect to one another, with respect to a cross-sectional center point of the wire.
A method for testing a wire or a welded or bonded joint in the wire for faults, comprising:
- producing a current in the wire or the welded or bonded joint and sensing the magnetic field on the wire or the welded or bonded joint and
- sensing the magnetic field on the wire or the welded or bonded joint by means of at least two magnetic field sensors, wherein the at least two magnetic field sensors are located at opposite circumferential locations of the wire;
- wherein a phase angle, amplitude, signal length and a number of peak values from data relating to the sensed magnetic field are indicated as characteristics of a fault in the wire.
A wire testing apparatus, comprising:
- a device for production of an eddy current in a wire,
- at least two magnetic field sensors which are arranged at opposite circumferential locations of the wire, in order to sense a magnetic field which is formed by the eddy current;
- and
- an evaluation unit configured to indicate a phase angle, amplitude, signal length and a number of peak values from the data relating to the sensed magnetic field as characteristics of a fault in the wire.
Dependencies are inferred from the claim text.