基于近场测量法的水声换能器声场重建方法研究

为了提高对水声换能器声场分析的效率,开展了基于近场测量法的水声换能器的声场重建方法研究,首先将水声换能器的全息测量面近似为等效声源面,通过积分得到声场重建模型,然后利用自主研发的水下声场测量系统获得发射换能器全息测量面的复声压,实现对其声场的重建,最后比较不同全息测量面的重建结果和实测数据,并分析全息测量面的位置对重建结果的误差影响,得到了重建方法的有效测量区间。该声场重建方法可快速得到水声换能器的声场分布,并且准确可靠。

Research on Hydroacoustic Transducer Sound FieId Reconstruction Method Based on Near-fieId Measurement Method

In order to improve the efficiency of analysing hydroacoustic transducer sound field,the research focusing on reconstruction method of hydroacoustic transducer sound field was developed based on near-field measurement. Firstly, the holographic measuring surface of hydroacoustic transducer was seemed as source surface,which made it realizable to obtain the sound field reconstruction model by integration. Then,took advantage of self-developed underwater acoustic measurement system to obtain the complex sound pressure of emission transducer at holographic measuring surface, according to which sound field was reconstructed. And finally,as well as ascertaining a valid measurement interval for the reconstruction method by comparing the different reconstruction results of holographic measurement surface and measured data and analyzing the impact of the holographic measurement plane position on reconstruction error. The sound field reconstruction method could obtain the field distribution of hydroacoustic transducer quickly,and it is accurate and reliable.