Patent · US Expired

Method and apparatus for detecting magnetic discontinuities by inducing a magnetic field in a magnetizable sample

US5442287A · kind A · utility

5Cited by

0References

19Claims

0Family size

Assignee

Tuboscope Vetco (Deutschland) GmbH · DE

Inventors

Reinhold Kammann · Celle, DE
Helmut Knapwost · Bad Doberan, DE
Manfred Worms · Bad Doberan, DE
Helgo Deeg · Winsen, DE

Key dates

Filing date	Apr 29, 1994
Grant date	Aug 15, 1995
Priority date	—
Expiry date	Apr 29, 2014

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/83
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A testing method and apparatus detects magnetic discontinuities in a sample of magnetizable material. The apparatus may include an electric motor, a transmission, driven transport wheels, and non-driven transport wheels. Further, the apparatus includes a magnetizing device for inducing a magnetic field in the sample. A sensor unit detects magnetic stray flux from the magnetic field induced in the sample and converts the detected magnetic stray flux into a signal for processing by a signal processor.

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