Author: Prasanta Kumar Samal
Abstract: This work has been done to realize a piezoelectric ultrasonic transducer, almost from scrap materials. The shape and size of the device were determined by considering practical limitations and for the ease of fabrication. The device was realized by conventional manufacturing processes. An aluminum plate was clamped in between two massive acrylic plates. These two massive plates having central holes were clamped together with nuts and bolts. This makes the aluminum plate as a diaphragm with fixed boundary condition at the circumference of the central hole. Two Lead (Pb)-Zirconium (Zr)-Titanate(Ti) (PZT) patches were glued unto the aluminium plate on its two faces concentric with the central holes of the two massive plates. The transducer can act both as an actuator and a sensor. Two PZT patches are meant for actuation and sensing of the vibration of the aluminum plate. The finite element analyses were performed using the commercial package ANSYS and plotted in MATLAB. The frequency response of the device was obtained from harmonic analysis in ANSYS. The actual natural frequency was determined experimentally using Laser Doppler Vibro-meter (LDV) and compared.
Keywords: Design, Fabrication; Characterization; Piezoelectric; Ultrasonic Transducer.
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