【作者】 靳建嘉； 陈洪娟； 王文芝； 张虎；

【Author】 JIN Jianjia,CHEN Hongjuan,WANG Wenzhi,ZHANG Hu, (Harbin engineering university.Harbin,150001,China)

【机构】 哈尔滨工程大学；

【摘要】 随着水声换能器工作频率的降低,导致低频换能器很难在人工水池条件下完成自由场校准。在研究亥姆霍兹积分法对于低频换能器校准的可行性基础上,借助矢量水听器进行低频换能器校准方法研究。通过近场测试包围低频换能器封闭面上的声压与声压梯度,求解远场声压。为验证使用矢量水听器进行亥姆霍兹积分法校准的可行性,使用两种不同的高频矢量水听器进行测试,与脉冲法测试结果进行比对,分析了使用矢量水听器进行亥姆霍兹积分法校准的误差来源。利用低频矢量水听器对低频换能器进行了测试,为此法校准低频换能器提供参考。更多还原

【Abstract】 Accurate free-field calibration of low frequency underwater acoustic transducers is difficult in artificial pond.Based on Helmholtz integration formula,it’s feasible to calibrate low frequency transducers.Hereby,we did a research on the method of calibrating low frequency transducers by virtue of vector hydrophones.Through testing the near-field pressure and pressure gradient around the closed surface of the low frequency transducer,the far-field pressure can be calculated.To verify the feasibility of calibrating low frequency transducers with Helmholtz integration formula by using vector hydrophones,we employed two kinds of high frequency vector hydrophones.The comparison calibration was carried out with the results obtained from pulse testing.After analysis,the source of errors for this mode is clear.In this way,low frequency vector hydrophones were adopted to calibrate low frequency transducers.The results offered references for this calibration method.更多还原