Eddy current pipeline inspection device and method

Details Eddy current pipeline inspection device and method Eddy current pipeline inspection device and method

G - Physics

01

N

G01N 27/90 (2006.01)

Patent

CA 2303153

A pipeline inspection vehicle (10) can be towed through a pipeline (11) via cable (12). The vehicle includes a power unit (20), a master processor module (21) and a coil (24) which generates an eddy current field which passes along the pipe. The resultant field is detected by master sensor ring (22) and slave sensor ring (25). Information on amplitude and phase of the detected field together with vehicle orientation information is sent to the base station and hence to computer (31). A distance encoder (32) assists in locating the position of any faults detected.

L'invention concerne un véhicule (10) d'inspection de pipelines pouvant être tracté dans un pipeline (11) via un câble (12). Ledit véhicule comprend une unité d'alimentation (20), un module processeur maître (21) et une bobine (24) générant un champ de courant de Foucault passant le long du tuyau. Le champ obtenu est détecté par une bague de détection maîtresse (22) et une bague de détection asservie (25). Des informations concernant l'amplitude et la phase du champ détecté, ainsi que des informations relatives à l'orientation du véhicule sont envoyées vers la station de base, puis vers un ordinateur (31). Un codeur de distance (32) contribue au repérage de la position de tout défaut détecté.

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