Patent · US Active

Method for nondestructive testing of pipes for surface flaws

US7779693B2 · kind B2 · utility

1Cited by

10References

6Claims

0Family size

Assignee

V & M DEUTSCHLAND GMBH · DE

Inventors

Thomas Orth · Bad Hersfeld, DE
Stefan Nitsche · Seelow, DE
Till Schmitte · Bochum, DE

Key dates

Filing date	Jul 28, 2006
Grant date	Aug 24, 2010
Priority date	—
Expiry date	Jul 6, 2027

Classification

Technology area (CPC G)Physics
CPC primaryG01N2291/2634
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for nondestructive testing of the pipes for detecting surface flaws is disclosed. With of the method, flaws can be detected and analyzed in near-real-time while the pipe is produced. The data obtained by ultrasound sensors are digitized in a time window following a trigger pulse, and the digitized data are processed in a digital processor, for example a DSP, using wavelet transforms. The evaluated quantity is compared with a reference value, wherein a determined flaw-based signal can be uniquely associated with the flaw located on the pipe surface.

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