Patent · US Active

Method and device for monitoring a zone of metal

US8816705B2 · kind B2 · utility

10Cited by

5References

10Claims

0Family size

Assignee

Roxar Flow Measurement AS · NO

Inventor

Olav Espejord · Trondheim, NO

Key dates

Filing date	Sep 25, 2009
Grant date	Aug 26, 2014
Priority date	—
Expiry date	Mar 28, 2030

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/20
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Method and device for monitoring a zone of a metal structure in terms of its electrical resistance in order to detect possible defects in the structure, by periodically passing current through the zone in different directions while measuring and recording voltage drops in a number of selected unit areas (aij) within the zone, and by combining, for each unit area (aij), at least two measured values recorded during at least two measurements made with current passing in different directions, and by comparing values obtained by at least one similarly obtained value made earlier.

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