基于线阵CCD的风浪环境下水面弱流场速度测量方法

The measurement of weak current velocity on water surface under wind wave environment based on linear array CCD

风浪环境下对水面弱流场进行测量是波-流作用机理的重要研究手段,对内波、水下地形、漩涡等海洋现象的微波遥感探测有着十分重要的意义。传统的流场测量方法无法在风浪环境下工作,难以应用在对表面弱流场与风生波间相互作用机理的研究中。提出了一种基于线阵电荷耦合组件(Charge-Coupled Device,CCD)的表面弱流场光学测量方法,通过表面波相速度的变化测量表面弱流场速度,其最大优点是工作在风浪环境下不受波浪振动影响。文章用水槽实验中内波激发的表面弱流场来验证此方法的正确性,对实际光学数据进行处理表明表面弱流场速度的测量精度优于0.3cm/s。所提出的方法可以用于测量风浪环境下表面弱流场并研究流场与风生波之间的相互作用。

The measurement of weak current on water surface under wind wave environment is a significant procedure for studying the interaction between current and wind waves,which is very important for the microwave remote sensing of internal waves,submarine topography and eddy etc.Traditional measurement methods can not work under wind wave environment,and then make it hard to study the interaction effect between current and wind waves.A new method for measuring weak current under wind wave environment based on linear array CCD is proposed in this paper.The wave tank experiment with surface current caused by internal waves is carried out to prove the validity of this method.Then the experimental data show that the measuring precision of water surface weak current velocity is better than 0.3cm/s.The experiment indicates that this method can be used to measure the weak current under wind wave environment and research the interaction between current and wind waves.