【作者】 王磊；

【导师】 陈洪娟；

【作者基本信息】 哈尔滨工程大学 ， 水声工程， 2018， 硕士

【摘要】 目前国内外有着多种矢量水听器指向性测量方法。一般而言,矢量水听器指向特性的测量方法都是采用高频段在消声水池测量,低频段用传统的驻波管水听器测量系统测量矢量水听器的指向性。而由于矢量水听器的种类增多,部分低频矢量水听器的尺寸太大,驻波管无法对其进行测量,所以需要研究新的矢量水听器指向性测量方法。论文通过对小水箱中的声场分布进行分析,得出小水箱中的声场存在大量的简正波,查阅相关资料可知,在稳定的时不变声场中,可以进行矢量水听器的指向特性的测量。因此,论文对现有高频和低频矢量水听器在小水箱中进行了指向特性的测量研究工作,并分别在驻波管中对低频矢量水听器和消声水池中对高频矢量水听器进行了指向特性的测量。大量的测试数据表明,在小水箱中可以完成对矢量水听器指向性图的测量,测量结果与常规测量方法得到的指向性图基本一致。因此,在小水箱中对矢量水听器进行指向特性测量可以解决在驻波管和消声水池中测量矢量水听器指向特性存在的频率限制问题,并且测试系统易于搭建,成本低。更多还原

【Abstract】 At present,there are several methods for directivity calibration of vector hydrophone at home and abroad.The vector hydrophone directivity is calibrated at high frequency in the anechoic tank while at low frequency by using standing wave tube(SWT)calibration systems.However,with many new types of vector hydrophone appeared,the SWT cannot be calibrated some large size low frequency vector hydrophone.Therefore,the new method for measuring directivity of vector hydrophone should be studied.By analyzing the distribution of sound field in the small water tank,it can be concluded that a large number of normal modes exist in the sound field.It can be seen from the relevant references that the calibration of the vector hydrophone directivity can be performed in a stable time invariant sound field.In this paper,the directivity of high-frequency and low-frequency vector hydrophone are measured in a small water tank,and the directivity of high-frequency vector hydrophone are measured in an anechoic tank while the directivity of low-frequency vector hydrophone are measured in the STW,respectively.A large number of test data showed that the vector hydrophone directional pattern measurement can be completed in a small water tank,the results obtained with the conventional measurement method is basically the same directional pattern.Therefore,the directivity measurement of the vector hydrophone in a small water tank can solve the problem of frequency limitation of vector hydrophone calibration in SWT and anechoic tank,and the measurement system is easy to establish and low cost as well.更多还原