The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 01, 2013
Filed:
Feb. 24, 2010
Gert Fischer, Wachtendonk, DE;
Sven Gwildies, Mülheim, DE;
Michael Kaack, Bochum, DE;
Alfred Graff, Essen, DE;
Ashraf Koka, Düsseldorf, DE;
Stefan Nitsche, Mülheim, DE;
Gert Fischer, Wachtendonk, DE;
Sven Gwildies, Mülheim, DE;
Michael Kaack, Bochum, DE;
Alfred Graff, Essen, DE;
Ashraf Koka, Düsseldorf, DE;
Stefan Nitsche, Mülheim, DE;
V & M Deutschland GmbH, Düsseldorf, DE;
Abstract
A device for nondestructive testing of a pipe made of ferromagnetic steel for detection of longitudinal, transverse or inclined flaws using magnetic or magnetic-induction test procedures is disclosed. The device includes a magnetizing yoke which transmits the magnetic flux contactless into the pipe and at least two magnetic-field-sensitive scanning probes having GMR sensors. The GMR sensors are combined into sensor groups in form of a sensor array and electrically connected in parallel. A single preamplifier connected to each sensor group in one-to-one correspondence. The device further includes an evaluation unit.