Simultaneous detection of the acoustic-field aberration and Doppler shift in forward acoustic scattering
Simultaneous detection of the acoustic-field aberration and Doppler shift in forward acoustic scattering
复制标题
同时检测前向声散射中的声场像差和多普勒频移
DOI：
10.1088/1674-1056/26/1/014301
复制
发表时间：
2017
影响因子：
1.7
通讯作者：
Lei Bo
中科院分区：
文献类型：
--
作者：
He Chuan Lin;Yang Kun De;Ma Yuan Liang;Lei Bo
当水下目标穿过声源-接收线时，接收声场中的像差和前向散射场中的多普勒频移同时产生。这两种变化的公式都是在理想的前向散射构型基础上发展起来的。场像差和多普勒频移都表示为同一变量的函数--目标运动时间。在传输连续波的水槽中进行了实验验证。分别利用简单的希尔伯特变换和混合技术从采集的数据中提取了光场像差和多普勒频移。测量的像差和多普勒频移与理论结果相吻合。通过同时提供接收声场中的像差和前向散射场中的多普勒频移，同时检测输出有利于提高目标检测的可靠性。
The aberration in the received acoustic field and the Doppler shift in the forward scattered field are simultaneously induced when a submerged target crosses the source–receiver line. Formulations for the two variations are developed upon an ideal forward scattering configuration. Both the field aberration and the Doppler shift are expressed as functions of the same argument—the target motion time. An experimental validation was carried out in a tank, in which the continuous wave was transmitted. The field aberration and the Doppler shift were extracted from the collected data by the simple Hilbert transform and a hybrid technique, respectively. The measured aberration and Doppler shift agree with the theoretical results. Simultaneous detection outputs are beneficial to enhance the reliability on target detection by providing both the aberrations in the received acoustic field and the Doppler shift in the forward scattered field.