Nondestructive evaluation of pipes and tubes using magnetostrictive sensors.

摘要

A METHOD AND APPARATUS FOR INSPECTION PIPES AND NON-ferromagnetic ferromagnetic (14) or other structures with cylindrical, magnetostrictive USING THE EFFECT FOR DETECTING DEFECTS IN THE INTERIOR OF THE STRUCTURE. THE INVENTION IS A test application ACTIVE, where a coil element TRANSMIT (16) generates a pulse MECANICO (15) inside the structure with cylindrical, through the effect magnetostrictive and a second coil (24) DETECTA WAVES MECHANICAL REFLECTED (15) inside the pipe, or a single sensor (10) OPERATE AS WELL AS TRANSMITTER DETECTOR. ALSO the present invention, provides for a OBSERVATION APPLICATION WITH A DETECTOR PASSIVE (16) COIL STRUCTURES THAT CONTINUOUSLY NOTES PARALLEL ferromagnetic and non-ferromagnetic WAVES FOR EMISSIONS MECHANICAL OR ACOUSTIC (15). STRUCTURES NO-ferromagnetic (14) are constructed so THAT MAY BE INSPECTED inserting a layer of ferromagnetic material such as nickel, ON WALL STRUCTURE BY MEANS OF A PLATING OR LINKING OF SUCH MATERIAL IN A LOCALIZED AREA WHERE It will place the sensor.