作者: Peter R. Stepanishen
DOI: 10.1121/1.385919
关键词: Transducer 、 Fourier transform 、 Piezoelectricity 、 Wideband 、 Signal 、 Block diagram 、 Impulse response 、 Materials science 、 Acoustics 、 Ultrasonic sensor
摘要: A model and approach to evaluate the transmit/receive response of pulsed ultrasonic thickness expander transducers is presented. The based on utilizing Mason account for transducer’s dynamic an impulse method wideband acoustic nearfield farfield phenomena. An overall which relates electrical input output transducer, including effects transducer dynamics diffraction, developed via a block diagram Fourier transform method. Numerical results are presented typical piezoelectric transducers. illustrate matching diffraction receive Since pulse backing piezoceramic element and/or changing shape radiating surface readily investigated, may be used design purposes. Furthermore, also combined with various types signal processors improve spatial resolution in echo systems utilization coded pulses advanced processing methods.