Abstract
A double-layered piezoelectric disk-type transducer (DLPT) without a backing and/or an intermediate layer is newly constructed and analyzed to generate short ultrasonic pulses. One of the disks is excited for the purpose of transmission and the other is used for canceling the ringing of the pulse. The driving conditions of the system, including the DLPT and the peripheral electronic component for generating the short ultrasonic pulse, are optimized by analysis using the cascade connection of a transmission line model. Experiments using the active ringing cancellation method with DLPT in water are also demonstrated. The analysis and experimental results were mostly in agreement with each other. A short ultrasonic pulse having a pulse width of 1.5 wavelengths is achieved.
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