一种水声阵阵元相位一致性的校准方法

南京大学学报(自然科学版) ›› 2012, Vol. 48 ›› Issue (5): 602–608.

一种水声阵阵元相位一致性的校准方法

平自红，赵涵

出版日期:2015-07-09 发布日期:2015-07-09
作者简介: (杭州应用声学研究所，杭州，311400)

A calibration method of phase coherence between underwater
acoustic array elements*

Pinh Zi- Hong**，Zhao Han

Online:2015-07-09 Published:2015-07-09
About author: (Hangzhou Applied Acoustics Research Institute，Hangzhou，311400，China)

摘要/Abstract

摘要： 在水声领域，相位校准实际上是指水声阵阵元间的相对相位校准.绝对相位校准在实际中是没有任何的意义.相对相位的校准是指被测阵元与激励信号比较的相位差，或阵元间相位的比较.在实际使用中，阵元间相位差的测试在消声水池中一般用单频连续信号法或脉冲信号法;在非消声水池中可用脉冲信号法，在反射波影响可忽略的声场条件下，也可采用扫频连续波信号法.这些方法的共同点是对信噪比的要求比较高.借鉴了空气声的测试经验，我们把时间延时谱法应用于混响场中水声阵阵元间相位一致性的校准，解决了测试时的信噪比问题，提高测试的效率.同时，针对它无法解决非均匀声场条件下相位一致性的准确校准问题，我们引入了易地传递函数法来有效地降低声场的影响，提出了结合这两种方法特点的易地时间延时谱法用于水声阵阵元相位一致性的校准.在木文中我们从时间延时谱法和易地传递函数法的原理出发对这种方法进行了理论分析，并利用它开展了实验研究.通过对不同声场条件下利用易地时间延时谱法测量阵元位一致性与声脉冲法的比较，我们从均匀声场的实验上验证了它测量阵元相位一致性的可行性;同时，从非均匀声场的测试中证明了这种方法的优越性.

Abstract: The paper introduces ex-situ time delay spectrometry, It combines time delay spectrometry (TDS) and ex situ transfer function method:the use of TDS through specific tracking filter to filter out reflected signals and obtains the direct signal in order to improve the signal to noise ratio of the test. At
the same time，ex situ transfer function method is used to get the geometric mean of two measurements before and after ex situ in order to reduce the error induced by the uneven sound field.The method is verified by experiments in the measurement of phase consistency between array elements and shows its
effectiveness and feasibility.

平自红，赵涵
. 一种水声阵阵元相位一致性的校准方法[J]. 南京大学学报(自然科学版), 2012, 48(5): 602–608.

Pinh Zi- Hong**，Zhao Han
. A calibration method of phase coherence between underwater
acoustic array elements*
[J]. Journal of Nanjing University(Natural Sciences), 2012, 48(5): 602–608.

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