Study on Image Measurement System by means of Statistical Analysis

介绍了可视化流场图像统计分析测量方法的原理及其应用。提出了一种利用粒子通过概率进行图像测量的新算法。通过拉格朗日微分法将该方法推广到广义情况，如时空导数法。当然，这种方法对稳定流动是有效的，也只适用于时间平均流速的测量。然而，对于用皮托管测量船后尾流分布很有用，这需要很长时间。测量三维速度矢量也是可能的。利用合成吸附剂和罗丹明b研制了一种新型荧光示踪剂。在这项研究中。适用于其他PIV测量。

The principle and its application of the measurement method using statistical analysis of visualized flow image have been shown.A new algorithm for the image measurement technique has developed using the passing probability of a particle. The method is extended by the Lagrange's differentiation to generalized case such as spatio-temporal derivative method. Of course, this method is effective for steady flow and also for the measurement of time average flow velocity filed only. It is useful, however, for the measurement of wake distribution behind ship, for which it takes long time by Pitot Tube. It is also possible to measure the three-dimensional velocity vector. A new fluorescent tracer particle has developed using synthetic adsorbent and rhodamine-B.in this research. It is applicable to the other PIV measurement.