EXPERIMENTAL MODAL ANALYSIS OF ULTRASONIC SURGICAL WAVEGUIDES USING EFFECT OF INVERSE MAGNETOSTRICTION

English version České info

Experimental modal analysis (EMA) of ultrasonic waveguides is important for many applications including design of ultrasonic surgical tools. However, most of the known sensors and instruments for measuring parameters of ultrasonic vibrations are limited to the measurements on the face surface of the ultrasonic waveguide and therefore unable to determine the spatial distribution of the parameters along its length, which in turn makes it difficult to identify natural modes and shapes. The article describes EMA of ultrasonic surgical waveguides based on the effect of inverse magnetostriction. During vibration of an ultrasonic waveguide the inverse magnetostriction generates alternating magnetic field which can be detected by means of an induction coil. Spatial resolution >of the measurements can be achieved by application of the sensors with flat (spiral) induction coils. The sensors used in the study have simple design and low cost making them affordable for wide circle of scientists and engineers. The results of experimental studies implemented on exemplary waveguide for ultrasonic angioplasty made of AISI 321 steel are presented and discussed. The article also discusses the methods for theoretical and experimental determination of the sensitivity of the sensors used in the study. Experimental data are validated by comparing them to the results of computer-aided modal analysis using the finite element method (FEM) and found to be in good agreement with the results of FEM modeling (relative deviation of the vibratory displacements amplitude is about 4.7 %). As it follows from the experimental data and their comparison to the results of FEM modeling, the effect of inverse magnetostriction can be efficiently used for EMA of ultrasonic waveguides.

Keywords:
modal analysis, ultrasonic waveguide, inductive sensor, inverse magnetostriction

Autoři: D. Stepanenko; V. Minchenya; K. Bogdanchuk
Působiště autorů: Belarussian national technical university, Minsk, Republic of Belarus
Vyšlo v časopise: Lékař a technika - Clinician and Technology No. 1, 2015, 45, 10-15
Kategorie: Původní práce

Souhrn

Keywords:
modal analysis, ultrasonic waveguide, inductive sensor, inverse magnetostriction

Zdroje

[1] Displacement measurement principle using fiber optic sensors – an introduction to the Fotonic Sensor. http://www.mtiinstruments.com/products/fiberopticmeasurement.aspx

[2] Solomakho, D., Minchenya, V. Application of noncontact inductive sensors for the purpose of flexible thrombolysis waveguides acoustic parameters control. Proc. of the 51st International scientific colloquium “Information technology and electrical engineering – devices and systems, materials and technologies for the future” [CD-ROM], Ilmenau, 2006, ISBN 3-938843-16-0.

[3] Stepanenko, D. et al. Induction sensors for measurement of vibration parameters of ultrasonic surgical waveguides. Lékař a Technika, 2012, vol. 42, No. 2, p. 11-14.

[4] Lanin, V. L. et al. Instrumental ensuring of measurement of parameters of ultrasonic effects in technological processes // Technology and design in electronic equipment (Tehnologija i konstruirovanie v jelektronnoj apparature), 2008, No. 2, p. 51-55. (in Russian).

[5] Abramenko, D. S. Methods and means for control of vibration amplitude of piezoelectric transducers of ultrasonic technological devices: synopsis of PhD dissertation. – Barnaul, 2010. – 23 p. (in Russian).

[6] Volkov, S. S. et al. Welding of plastics with ultrasound. – Moscow, 1974. – 264 p. (in Russian).

[7] Langenecker, B. Inverse magnetostrictive effect of ultrasonic stress waves in steel. Journal of Acoustical Society of America, 1965, vol. 38, p. 234-238.

[8] Garcia, R., Hammitt, F. G. Amplitude determination of an ultrasonic transducer by means of an accelerometer assembly: Internal report 05031-7-I. – The University of Michigan, Laboratory for Fluid Flow and Heat Transport Phenomena, 1965. – 21 p.

[9] Smith, A. W., Weimer, D. K. Comparison of supersonic intensities by means of a magnetostriction gauge. Review of Scientific Instruments, 1947, vol. 18, p. 188-190.

[10] Kozhushko, V. V. et al. Detection of broadband laser induced longitudinal ultrasonic pulses in ultrafine grain nickel by pancake coil. AIP Conference Proceedings, 2012, vol. 1433, p. 733-736.

[11] Takashima, K. et al. Nondestructive inspection of austenitic stainless steels by detection of acoustically stimulated electromagnetic response. Proc. of Symposium on Ultrasonic Electronics, 2011, vol. 32, p. 349-350.

[12] Yamada, H. et al. Magnetic imaging by ultrasonic techniques. Proc. of Symposium on Ultrasonic Electronics, 2009, vol. 30, p. 57-58.

[13] Stepanenko, D. A., Minchenya, V. T. Modeling of flexible waveguides for ultrasonic vibrations transmission: longitudinal and flexural vibrations of non-deformed waveguide. Ultrasonics, 2010, vol. 50, p. 424-430.

[14] Guyomar, D. et al. Piezoelectric ceramics nonlinear behavior. Application to Langevin transducer. Journal de Physique III France, 1997, vol. 7, p. 1197-1208.

[15] Chechernikov, V.I. Magnetic measurements. – Moscow, 1969. – 385 p. (in Russian).

[16] Lamport, H., Zinsser, H.H. Strain gauge measurement of output of magnetostrictive ultrasonic transducer – pitfalls of optical measurement. Journal of Acoustical Society of America, 1950, vol. 31, p. 435-438.