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Development of Pressure Control System of Contact Transducer for Measurement of Ultrasonic Nonlinear Parameter  

Lee, In-Ho (School of Mechanical Engineering, Hanyang University)
Son, Dae-Soo (School of Mechanical Engineering, Hanyang University)
Choi, Ik-Hwang (Automotive Engineering, Graduate School of Hanyang University)
Lee, Tae-Hun (Automotive Engineering, Graduate School of Hanyang University)
Jhang, Kyung-Young (School of Mechanical Engineering, Hanyang University)
Publication Information
Journal of the Korean Society for Nondestructive Testing / v.27, no.6, 2007 , pp. 576-581 More about this Journal
Abstract
Ultrasonic nonlinearity has been considered as a promising method to evaluate the micro damage of material; however, its magnitude is so small that its measurement is not easy. Especially, when we use contact PZT transducer, if the contacting pressure is not kept in constant during the measurement then there exists extraneous fluctuation in the measured nonlinearity caused by the unstable contact condition, In this paper, we developed a pneumatic control system to keep the contacting pressure of transducer in constant during the measurement and analyzed the effect of contacting pressure to the ultrasonic nonlinearity measurement As a result, we found that the pressure of transducer in our measurement system should be greater than 170 kPa to measure the ultrasonic nonlinear parameter in stable with no dependency on the contacting pressure.
Keywords
Ultrasonic Nonlinear Parameter; Ultrasonic Transducer; Contacting Pressure; Pneumatic Control;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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