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Sensing volume and biasing corrections for dual counter LDA processors

机译：双计数器LDA处理器的感应音量和偏置校正

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Most operable Laser Doppler Anemometry (LDA) systems employ the fringe mode geometrical configuration with a counting type signal processor. The fringes are contained within an ellipsoid volume, which is commonly described as the sensing volume of the LDA. Generally, the dimensions of the focusing volume are determined from the waist diameter of the beams and their intersection angle. However, the electronic processing system exerts several constraints upon the size of the focusing volume. In this study we will address ourselves to the constraints of the dual counter processing system, which is based on the individual realization mode of the LDA. Correction equations will be derived for the sensing volume and the individual realization biasing and applied to two‐component flow fields, measured by a one‐dimensional LDA system.
机译：大多数可操作的激光多普勒风速仪（LDA）系统采用带有计数型信号处理器的条纹模式几何配置。条纹包含在椭球体中，通常被称为LDA的感应体积。通常，聚焦体积的尺寸由光束的腰部直径及其相交角确定。然而，电子处理系统对聚焦体积的大小施加了一些约束。在本研究中，我们将解决双重计数器处理系统的局限性，该系统基于LDA的单独实现模式。将针对感测体积和个体实现偏差推导出校正方程，并将其应用于一维LDA系统测量的两组分流场。

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