Study On Technology Of Curved Disk Transducer And Array

With the country's vigorous development and exploration of the ocean,the application and demand for sonar products are also increasing,the demand for wide-band,low-frequency and small-size emission sound sources is even more urgent.However,the current broadband and low-frequency sound sources are either relatively narrow in frequency bandwidth,or the sound sources are large in size and not easy to carry and use.The new curved disk transducer and array technology can be well applied in the field of marine acoustics due to its small size and wide frequency band.In this article,we analyzed the transducer based on the Rayleigh principle and calculated the data required for the design of a new type of curved disc transducer,that is,various design parameters such as displacement distribution curve,kinetic energy,potential energy,effective electromechanical coupling coefficient and resonance frequency.The performance of the new curved disc transducer was analyzed using ANSYS finite element analysis software.Summarize the influence of the different structural dimensions of each part of the transmitting transducer on its resonance frequency,transmission voltage response and other related parameters,and find out some of the influence rules.At the same time,by analyzing the influence of the number of array elements and the distance between each element of the array on each parameter,such as the resonance frequency of the array and the transmission voltage response,the relevant analysis results are summarized to study the influence law.The array uses the very strong mutual radiation interaction between the array elements by adjusting the spacing and number of the array elements to achieve a wide frequency band of the sound source,and at the same time,the working frequency of the transducer array is further shifted to a lower frequency,effectively improving the value of the transmitter voltage response of the transducer array.Finally,according to the results of the simulation analysis,the performance parameters of the transducer were designed and the drawing design was completed,and five new curved disc transducers were produced.Use the acoustic test system to complete the acoustic performance test of each transducer in the anechoic pool,the measured results show that the resonant frequency of the new curved disk transducer is 1.9k Hz,and the maximum transmission voltage response is 130.4d B,and compare the theoretical result calculated by the simulation with the actual result of the actual test.At the same time,by permuting and installing 5 transducers,the acoustic performance of the array is tested in a pool,compare the influence of the number,spacing and wiring of different array elements on the acoustic performance of the array,and summarize the influence rules.In the final measurement result,the resonant frequency of the array is 1.3k Hz,the maximum transmission voltage response is 135.1d B,and the array test result and the simulation result are compared and analyzed on the data.