| 李鹏飞,彭东立.相控阵ADCP编码信号相移波束形成[J].声学技术,2015,34(6):545~550 |
| 相控阵ADCP编码信号相移波束形成 |
| Coded signal phase shift beamforming of phased-array ADCP |
| 投稿时间：2015-07-20 修订日期：2015-10-19 |
| DOI：10.16300/j.cnki.1000-3630.2015.06.015 |
| 中文关键词: 声学多普勒流速剖面仪 相控阵 波束形成 编码信号 |
| 英文关键词: Acoustic Doppler Current Profiler(ADCP) phased-array beam forming coded signal |
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| 中文摘要: |
| 相对于活塞式声学多普勒流速剖面仪,相控阵声学多普勒流速剖面仪的换能器体积大大缩小,并且依托相控阵本身的物理特性,无需进行声速补偿。利用窄带相控阵声学多普勒流速剖面仪系统进行编码信号的发射与接收,从而提高相控阵声学多普勒流速剖面仪的设备性能。首先介绍了相控阵ADCP的波束形成方法,然后分别介绍了相控阵的相移波束形成和时延波束形成原理,对编码信号相移相控波束形成情况下,相控阵发射和接收信号波束开角进行了对比,并对作用距离、测量精度、系统复杂度等系统性能进行了分析。分析结果表明:窄带相控阵声学多普勒流速剖面仪可以进行编码信号的发射和接收,能够提高系统的空间分辨率和测量精度,从而提高相控阵声学多普勒流速剖面仪的性能。 |
| 英文摘要: |
| The volume of the transducer of phased-array ADCP (Acoustic Doppler Current Profiler) is much smaller than the volume of traditional piston ADCP, and compensation of sound velocity is not needed for physical characteristic of phased-array ADCP. The narrowband phased-array ADCP can transmit and receive coded signal to improve the equipment performance. This article starts with the beam forming method of phased-array ADCP, and then describes the theory of phase shift beamforming and time delay beamforming respectively. The beam angles of phased array ADCP are compared, and the working distance, measurement accuracy and system complexity are analyzed. The conclusion indicates that the narrowband Phased-array ADCP can transmit and receive coded signal to improve spatial resolution and measurement precision, and the performance of phased array ADCP is highly improved. |
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