Patent · US Active

Device for nondestructive testing of pipes

US8344725B2 · kind B2 · utility

3Cited by

3References

6Claims

0Family size

Assignee

V & M DEUTSCHLAND GMBH · DE

Inventors

Gert Fischer · Feldafing, DE
Sven Gwildies · Bad Hersfeld, DE
Michael Kaack · Bochum, DE
Alfred Graff · Essen, DE
Ashraf Koka · Mülheim an der Ruhr, DE
Stefan Nitsche · Seelow, DE

Key dates

Filing date	Feb 24, 2010
Grant date	Jan 1, 2013
Priority date	—
Expiry date	Nov 25, 2030

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/82
WIPO fieldMeasurement
WIPO sectorInstruments

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.