DPIV相关分析中相关窗口大小的确定

Determination of the correlation window sizes in correlation analysis of DPIV

在数字粒子图像测速系统 (DPIV)中 ,目前常用数字图像相关方法获取粒子图像中的运动信息 ,其中相关窗口尺寸参数的选择是至关重要的。通过对相关分析方法的分析 ,依据采样定理提出了确定相关分析窗口尺寸的新依据。通过对絮凝池水流流场的量测验证表明 ,采用该方法具有分析结果精度高、可靠性强的特点。

In the digital particle image velocimetry (DPIV) system, the digital image correlation is normally used to acquire the displacement information of particles at present And in this method, it is very important to determine the correlation window size Through the theory of correlation analyse, the new method for determining correlation window sizes is proposed based on the sampling theory The measurements of velocity field in the flocculation pool show that this method is accurate and reliable