Development of a Multifrequency, Ultrasonic, Pulse-Coherent Doppler Sonar for Turbulence Studies

开发用于湍流研究的多频超声波脉冲相干多普勒声纳

• 批准号: 0327600
• 负责人: Eugene Terray
• 金额: --
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-10-01 至 2008-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0327600&HistoricalAwards=false
• 关键词: Development; Multifrequency; Ultrasonic; Pulse; Coherent

P.I. Terray (WHOI) Proposal #: 0327600Proposal Title: Development of a Multifrequency, Ultrasonic, Pulse-Coherent Doppler Sonar for Turbulence Studies Project SummaryThe PIs propose to develop a small, low power, single-axis, range-gated pulse-coherent Doppler sonar module intended for boundary layer turbulence studies. This instrument will be capable of autonomous operation from a variety of platforms, such as buoys, moorings, and bottom frames, but the PIs specific interest is in using it from small autonomous underwater vehicles to estimate turbulence kinetic energy dissipation rates in bottom and surface boundary layers. The novel aspect of this work is our proposed use of multiple acoustic frequencies to reduce the bias due to Doppler phase noise in the spectrum of velocity, thereby enabling measurement of smaller dissipation rates than was previously possible with this class of sensors. The sonar developed here will be a high frequency, short range instrument, with a spatial resolution somewhat smaller than 1 cm. This sensor will also be modular so that coherent arrays and multistatic configurations can be constructed.

P.I. Terray （WHOI）提案#:0327600提案标题：开发用于湍流研究的多频率，超声波，脉冲相干多普勒声纳项目摘要PIs建议开发一种小型，低功率，单轴，距离门控的脉冲相干多普勒声纳模块，用于边界层湍流研究。该仪器将能够在各种平台上自主操作，如浮标、系泊和底部框架，但pi的具体兴趣是在小型自主水下航行器上使用它来估计底部和表面边界层的湍流动能耗散率。这项工作的新颖之处在于，我们建议使用多个声波频率来减少由于速度谱中的多普勒相位噪声造成的偏置，从而能够测量比以前使用这类传感器更小的耗散率。这里开发的声纳将是一种高频、短距离仪器，空间分辨率略小于1厘米。该传感器也将是模块化的，以便可以构建相干阵列和多静态配置。