The Vectron
The Vectron
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威克创
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发表时间：
2015
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通讯作者：
J. Culina
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作者：
A. Hay;L. Zedel;S. Nylund;R. Craig;J. Culina
Vectron是一种新的脉冲相干多普勒声纳系统，它可以远程测量水中深度(距离仪器换能器10米)的湍流速度，以满足流中潮汐发电行业的测量和监测需求。多个声纳单元(基于Nortek AD2CP硬件平台)联网在一起，仪器采用模块化设计，可在声学采样方案中提供极大的灵活性。基本独立的仪器之间的时间同步是通过使用主精确时间协议(PTP)时钟的低延迟以太网交换机实现的。脉冲间相干采样是通过利用隔离小采样间隔(距离中心换能器7米处)的双基地光束几何结构来实现的。速度模糊是使用一种全新的技术来克服的，该技术基于对脉冲-脉冲相关性的多次计算。在新斯科舍省帕尔斯伯勒的一个码头上部署了一个原型系统，在那里观测到了平均速度高达约2m/S的湍流。给出了速度功率谱，并与附近单点流量计的参考观测结果进行了比较。
The Vectron is a new pulse-coherent Doppler sonar system that has been developed to allow remote measurement of turbulent velocities at mid-water depth (O 10 m distant from the instrument transducers) to meet the measurement and monitoring needs of the in-stream tidal generating industry. Multiple sonar units (based on the Nortek AD2CP hardware platform) are networked together and the instrument is configured with a modular philosophy that allows a great deal of flexibility in acoustic sampling schemes. Time synchronization between the essentially independent instruments is achieved through a low latency Ethernet switch using a master Precision Time Protocol (PTP) clock. Pulse-to-pulse coherent sampling is achieved by taking advantage of bistatic beam geometries that isolate a small sample interval (at 7 m from the central transducer). Velocity ambiguity is overcome using a completely new technique based on multiple computations of the pulse-topulse correlations. A prototype system was deployed from a wharf in Parrsboro (Nova Scotia) where turbulent flows with mean velocities up to about 2 m/s were observed. Velocity power spectra are presented and compared to reference observations from a nearby single-point flowmeter.