The magnetic leakage field measurement method is used for the non-destructive and non-contact detection of fractures in the prestressing reinforcement of prestressed concrete structures. The transceiver unit, which contains an electromagnet and magnetic field sensors, is moved along the prestressing reinforcement on a rail. This magnetizes the steel to be examined. A magnetic leakage flux emerges at a fracture point, which is detected by the magnetic field sensors on the concrete surface.
Measurement at the side of a bridge's box girder
Transceiver unit of the leakage field measurement system at midspan
Inspection of the prestressing reinforcement from an underbridge unit
Contact
Dr.-Ing.
Frank Lehmann
Head of Unit
Dipl.-Ing.