Mitigation of surface reflection in PIV measurements
Mitigation of surface reflection in PIV measurements
复制标题
减轻 PIV 测量中的表面反射
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
J. Carmeliet
中科院分区：
文献类型：
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作者：
E. Paterna;P. Moonen;V. Dorer;J. Carmeliet
在进行粒子图像测速 (PIV) 测量时，高强度激光的表面反射是一个常见问题。后果包括近地表区域的信噪比较差（曝光过度）以及相机传感器损坏。严重程度取决于三个因素之间的相互作用：表面特性、激光强度和相对相机位置。在立体或断层成像 PIV 设置中，材料选择通常是唯一可以调整的因素。我们提出了一项系统的比较研究，涉及不同的材料和表面处理。它们减轻表面反射的潜力是根据平坦的黑色油漆木质表面的参考案例进行量化的。通过在木材上涂荧光涂料或使用电解抛光钢可以最大程度地降低表面反射强度。使用更广泛的黑色扁平木材表现出较差的性能。
Surface reflections of high-intensity laser light are a common concern when conducting particle image velocimetry (PIV) measurements. Consequences range from a poor signal-to-noise ratio (overexposure) in near-surface areas up to camera sensor damage. The severity depends on the interplay between three factors: surface properties, laser light intensity and relative camera position. In stereoscopic or tomographic PIV setups, material selection is often the only factor which can be adapted. We present a systematic comparative study, involving different materials and surface treatments. Their potential to mitigate surface reflections is quantified against the reference case of a flat black painted wooden surface. The largest reduction of surface reflection intensity is obtained by applying fluorescent paint on wood or by employing electropolished steel. The more widely used flat black painted wood shows poor behavior.