In underwater acoustic applications,high frequency transducers often need a wider working bandwidth to obtain more target information.In this paper,the equivalent circuit model is established firstly,and the material and thickness of the matching layer are selected by using particle swarm optimization so that the transducer has the widest working band.Secondly,the finite element method is used to analyze and calculate the admittance and emission voltage response of the transducer with matched layers.Finally,on the basis of theoretical analysis,the high-frequency broadband transducer with three matching layers is successfully fabricated.The working frequency band of the transducer is about 150-430 kHz,the relative bandwidth is 93%,and the fluctuation of the transmitting voltage response is-6 dB.The experimental results show that the design of three matching layers can effectively broaden the working bandwidth of high frequency transducer.
关键词
高频换能器/宽带/多匹配层
Key words
high frequency transducer/bandwidth/multi-matching layer
维普
万方数据