Optimal design of impedance matching for dipole acoustic transducer

The dipole emitter transducer is the core component of the remote acoustic logging instrument. The energy and working bandwidth of the sound wave radiated by the transducer directly affect the quality of the logging data. In order to optimize the impendence matching of the trancducer, in this paper, the mechanical and electrical equivalent model of the transducer is combined with the broadband impedance matching network, and the network component parameters are calculated based on the adaptive Gauss-Newton algorithm, which can fully consider the material and structure parameters of the transducer and achieve rapid convergence. Finally, the matched trancduceris tested in the anechoic pool, where the active power, excitation voltage, horizontal directivity, and hydrophone receiving voltage are observed simultaneously. The effect of the impedance matching network is comprehensively evaluated. The experimental results show that the broadband impedance matching network designed in this paper can significantly improve the acoustic radiation performance of the transducer, broaden the bandwidth by 3 times, and increase the active power by 2.7 times.