A system for magnetostrictive transduction of guided waves in fluid-filled pipes of small diameter

This paper is concerned with the design of magnetostrictive transducers for the excitation and detection of guided waves in metal pipes of small diameter (mm) and their application to the study of wave propagation in pipes filled with water or supercritical CO2. Optimized system design is based on a simulation of the overall signal pathway which includes the electric circuit conditions at the transducers, mode excitability, and the wavenumber filtering effect of the spatial distribution of the exciting alternating magnetic field. A prototype system was built, and experimental observations on small diameter pipes indicated good agreement with expected results from simulations. The reassigned spectrogram has been used to compare expectation on the basis of guided wave dispersion curves for fluid-filled pipes with experimental data.

[1]  H. Kolsky,et al.  The propagation of elastic waves in thin cylindrical shells , 1966 .

[2]  K. Kodera,et al.  Analysis of time-varying signals with small BT values , 1978 .

[3]  Michel Brissaud,et al.  Spatial analysis of torsional wave propagation in a cylindrical waveguide. Application to magnetostrictive generation , 2001 .

[4]  Michel Brissaud,et al.  Magnetostrictive pulse-echo device for non-destructive evaluation of cylindrical steel materials using longitudinal guided waves , 2002 .

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

[6]  F. Seco,et al.  A NEW MODEL FOR THE MAGNETOSTRICTIVE GENERATION OF ULTRASOUND IN WAVEGUIDES OF CYLINDRICAL SYMMETRY , 2003 .

[7]  Sandro Manservisi,et al.  On a low-dimensional model for magnetostriction , 2006 .

[8]  M.J.S. Lowe,et al.  Matrix techniques for modeling ultrasonic waves in multilayered media , 1995, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[9]  Alison B. Flatau,et al.  Structural magnetic strain model for magnetostrictive transducers , 2000 .

[10]  M. Onoe.  Theory of Ultrasonic Delay Lines for Direct‐Current Pulse Transmission , 1962 .

[11]  E. Villari,et al.  Ueber die Aenderungen des magnetischen Moments, welche der Zug und das Hindurchleiten eines galvanischen Stroms in einem Stabe von Stahl oder Eisen hervorbringen , 1865 .

[12]  Niethammer,et al.  Time-frequency representation of Lamb waves using the reassigned spectrogram , 2000, The Journal of the Acoustical Society of America.

[13]  Joshua E. Greenspon.  Axially Symmetric Vibrations of a Thick Cylindrical Shell in an Acoustic Medium , 1960 .

[14]  P. M. Naghdi,et al.  Propagation of Elastic Waves in Cylindrical Shells, Including the Effects of Transverse Shear and Rotatory Inertia , 1956 .

[15]  J. P. Joule Esq.,et al.  XVII. On the effects of magnetism upon the dimensions of iron and steel bars , 1847 .

[16]  H. Kwun,et al.  Dispersion of longitudinal waves propagating in liquid-filled cylindrical shells , 1999 .

[17]  Riichi Murayama,et al.  Study of driving mechanism on electromagnetic acoustic transducer for Lamb wave using magnetostrictive effect and application in drawability evaluation of thin steel sheets , 1999 .

[18]  F. Simonetti,et al.  Measurement of the properties of fluids inside pipes using guided longitudinal waves , 2007, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[19]  D. Jiles.  Theory of the magnetomechanical effect , 1995 .

[20]  Trémolet de Lacheisserie,et al.  Magnetostriction : theory and applications of magnetoelasticity , 1993 .

[21]  Miguel C. Junger,et al.  The Propagation of Elastic Waves in Thin‐Walled Cylindrical Shells , 1954 .

[22]  A. Rothbart,et al.  A Theory of Pulse Transmission Along a Magnetostrictive Delay Line , 1957, IRE Transactions on Ultrasonic Engineering.

[23]  Peter Cawley,et al.  Guided waves in fluid-filled pipes surrounded by different fluids , 2001 .

[24]  Hegeon Kwun,et al.  Magnetostrictive generation and detection of longitudinal, torsional, and flexural waves in a steel rod , 1994 .

[25]  J Jarzynski,et al.  Time-frequency representations of Lamb waves. , 2001, The Journal of the Acoustical Society of America.

[26]  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.

[27]  M. Lowe,et al.  DISPERSE: A GENERAL PURPOSE PROGRAM FOR CREATING DISPERSION CURVES , 1997 .

[28]  D. Jiles,et al.  Theory of ferromagnetic hysteresis , 1986 .

[29]  Pd Wilcox,et al.  Modeling the Excitation of Lamb and SH Waves by Point and Line Sources , 2004 .

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

[31]  Patrick Flandrin,et al.  Improving the readability of time-frequency and time-scale representations by the reassignment method , 1995, IEEE Trans. Signal Process..