Method and device for detecting the location of a fault within a dielectric layer of an electrically conducting pipe
US4912418A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 13, 1988 |
| Grant date | Mar 27, 1990 |
| Priority date | — |
| Expiry date | Jun 13, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and a measuring device for localizing a damage in a dielectric corrosion resistant layer of a pipe line are described, especially for an enameled pipe line, through which an electrolytically conducting fluid is passed. Localization is achieved by performing a potential difference measurement between two electrodes arranged at the begining and at the end of a supervised region along the length of the pipe line, to which preferably a constant current source is connected, the positive terminal of which is connected with the carrier material of the pipe line and the negative terminal of which is connected with the two electrodes. Preverably a calibration is performed by means of an additional electrode, which can be connected to the measurement region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.