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A new dynamic masking technique for time resolved PIV analysis

机译：用于时间解决PIV分析的新动态掩蔽技术

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摘要

Time resolved PIV encompassing moving and/or deformable objects interfering with the light source requires the employment of dynamic masking (DM). A few DM techniques have been recently developed, mainly in microfluidics and multiphase flows fields. Most of them require ad-hoc design of the experimental setup, and may spoil the accuracy of the resulting PIV analysis. A new DM technique is here presented which envisages, along with a dedicated masking algorithm, the employment of fluorescent coating to allow for accurate tracking of the object. We show results from measurements obtained through a validated PIV setup demonstrating the need to include a DM step even for objects featuring limited displacements. We compare the proposed algorithm with both a no-masking and a static masking solution. In the framework of developing low cost, flexible and accurate PIV setups, the proposed algorithm is made available through a freeware application able to generate masks to be used by an existing, freeware PIV analysis package.
机译：包括干扰光源的移动和/或可变形物体的时间分辨的PIV需要采用动态掩蔽（DM）。最近已经开发了几种DM技术，主要是微流体和多相流场。其中大多数都需要实验设置的Ad-hoc设计，并且可能会破坏所得PIV分析的准确性。这里介绍了一种新的DM技术，其中包括专用掩蔽算法，荧光涂层的采用允许准确跟踪物体。我们展示通过通过验证的PIV设置获得的测量结果，演示即使对于具有有限位移的物体，也需要包括DM步骤的需要。我们将所提出的算法与静态掩蔽和静态屏蔽解决方案进行比较。在开发低成本，灵活和准确的PIV设置的框架中，通过软件应用程序可提供所提出的算法，能够生成现有的免费软件PIV分析包的掩模。

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