Magnetostrictive Sensor for Generating and Detecting Plate Guided Waves

The development of a magnetostrictive sensor for generating and detecting guided waves in ferromagnetic plate is described. The sensor consists of a channel-shaped core and coils wound around the core along its length. It is shown that the sensor is capable of generating and detecting both the symmetric and antisymmetric Lamb wave modes and the shear horizontal wave modes in plates. It is also found that the beam pattern produced by the sensor follows the pattern expected for a line source in a two-dimensional medium.

[1]  Joseph L. Rose,et al.  Ultrasonic guided wave inspection concepts for steam generator tubing , 1994 .

[2]  H. Kwun,et al.  Detection of fractured wires in steel cables using magnetorestrictive sensors , 1994 .

[3]  R.B. Thompson,et al.  A model for the electromagnetic generation of ultrasonic guided waves in ferromagnetic metal polycrystals , 1978, IEEE Transactions on Sonics and Ultrasonics.

[4]  R. Murayama.  Driving mechanism on magnetostrictive type electromagnetic acoustic transducer for symmetrical vertical-mode Lamb wave and for shear horizontal-mode plate wave , 1996 .

[5]  Peter Cawley,et al.  The excitation of Lamb waves in pipes using dry-coupled piezoelectric transducers , 1996 .

[6]  K. A. Bartels,et al.  Experimental observation of elastic‐wave dispersion in bounded solids of various configurations , 1996 .

[7]  Peter Cawley,et al.  Optimization of lamb wave inspection techniques , 1992 .

[8]  J. Krautkrämer,et al.  Ultrasonic Testing of Materials , 1969 .

[9]  H. Frost,et al.  SAW Electromagnetic Transducer Design for Nondestructive Evaluation Applications , 1976, IEEE Transactions on Sonics and Ultrasonics.

[10]  H. Kwun,et al.  The magnetostrictive sensor technology for long range guided wave testing and monitoring of structures , 2003 .

[11]  P. Cawley,et al.  The use of Lamb waves for the long range inspection of large structures , 1996 .

[12]  R.C. William,et al.  Theory of Magnetostrictive Delay Lines for Pulse and Continuous Wave Transmission , 1959, IRE Transactions on Ultrasonic Engineering.

[13]  Torsten Rohlfing,et al.  Nonrigid image registration in shared-memory multiprocessor environments with application to brains, breasts, and bees , 2003, IEEE Transactions on Information Technology in Biomedicine.

[14]  N. S. Tzannes,et al.  Joule and Wiedemann Effects-The Simultaneous Generation of Longitudinal and Torsional Stress Pulses in Magnetostrictive Materials , 1966, IEEE Transactions on Sonics and Ultrasonics.

[15]  K. A. Bartels,et al.  Magnetostrictive sensor technology and its applications , 1998 .