In this study, two simple electrical impedance tuning methods derived from Krimholtz, Leedom, and Matthaei (KLM) modeling were proposed for increasing the sensitivity of a piezo-electric material-based ultrasonic transducer. In the first method, the reactance components of the ultrasonic transducer were removed, and in the other method, the electrical impedance of an ultrasonic transducer was matched to that of the ultrasonic system. To these ends, electrical circuits composed of inductors and capacitors were de-signed and KLM simulations of the two methods were performed. To verify the simulation results, ultrasonic transducers were fabricated and operated under the same conditions as in the simulations, and the experimental results were compared with the simulated results. In conclusion, the electrical tuning method (elimination of the reactance compo-nents) was more effective and the transducer circuit structure was simpler. The experi-mental results showed good agreement with the KLM simulation results.

在这项研究中，从Krimholtz，Leedom和Matthaei（KLM）建模中推导了两种简单的电阻抗调谐方法，以提高基于压电材料的超声换能器的灵敏度。在第一种方法中，去除超声换能器的电抗成分，在另一种方法中，使超声换能器的电阻抗与超声系统的电阻抗匹配。为此，设计了由电感器和电容器组成的电路，并对这两种方法进行了KLM仿真。为了验证模拟结果，在与模拟相同的条件下制造并操作了超声换能器，并将实验结果与模拟结果进行了比较。结论，电调谐方法（消除电抗成分）更有效，换能器电路结构更简单。实验结果与荷航模拟结果吻合良好。