Korean Journal of Materials Research, Vol.13, No.10, 658-662, October, 2003
비파괴 검사용 초음파 탐촉자에서의 정합층 최적 설계법
Design Method for the Optimized Acoustic Matching Layers of UT Probes
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In this study, we have tried to find the optimized design variables of the matching layer which is important part of thickness mode ultrasonic transducer and finally reach the conclusion that the electrical property of piezo-element must be under consideration when the optimized acoustic impedance is estimated. Proper expression of the effective impedance of front load at free resonant frequency(: /) has been induced by introducing the principle of binomial multilayer transformer and gradient based numerical method is utilized to find the most acceptable value of / . Optimized point of acoustic impedance can be calculated directly from using some simple formula which we propose. We also verify our result by both numerical and experimental method and get a good enhancement especially it concern to the bandwidth of ultrasonic transducer.
- Krautkramer J, Ultrasonic Testing of Material, Springer-Verlag, Berlin (1977) (1977)
- Kinsler LE, Fundamentals of Acoustics, John Wiley & Sons, New York (1982) (1982)
- Kossoff G, IEEE Trans. Sonics and Ultrasonics, 13, 20 (1966)
- Goll J, Auld BA, IEEE Trans. Sonics and Ultrasonics, 22, 53 (1975)
- Desilets CS, Fraser JD, Kino GS, IEEE Trans. on Sonics and Ultrasonics, 25, 115 (1978)
- Mason WP, Electromechanical Transducers and Wave Filters, Van Nostrand, Princeton, N.J. (1948) (1948)
- Pozar DM, Microwave Engineering, John Wiley & Sons, New York (1988) (1988)
- Kino GS, Acoustic Waves, Devices, Imaging & Analog Signal Processing, Prentice-Hall, Englewood Cliffs, N.J. (1987) (1987)
- Kino GS, Acoustic Waves, Devices, Imaging & Analog Signal Processing, Prentice-Hall, Englewood Cliffs, N.J. (1987) (1987)
- Ristic VM, Principles of Acoustic Devices, John Wiley & Sons, New York (1998) (1988)