Single-Mode Piezoelectric Ultrasonic Transducer Equivalent Circuit Parameter Calculations and Optimization Using Experimental Data

摘要

The impedance characteristics of piezoelectric ultrasonic transducers can be described with the help of an electrical equivalent circuit. The circuit permits transducer analysis. Therefore, it is desirable to have a way of determining the equivalent circuit parameters of a given transducer. We propose a method which can basically be divided in two parts: 1) Approximate calculation of the circuit parameters and 2) Increase the accuracy of the parameters by optimization techniques. For its availability and relatively simple implementation, the optimization toolbox of MATLAB was used to perform the second part. The results obtained show a good match between the measured and the optimized data.