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本文介绍一种二维瞬态多点流场测量方法──网格图像测速法。运用数字图像处理技术由氢气泡时间－染色线流动显示图像自动生成网格图像，网格图像的网格结点为氢气泡块角点的拟合点，由网格结点的位移确定流场速度。
This article describes a two-dimensional transient multi-point flow field measurement method ─ ─ grid image velocimetry. The digital image processing technology is used to automatically generate the grid image from the hydrogen bubble time-stain flow display image. The grid node of the grid image is the fitting point of the hydrogen bubble block corner, and the displacement of the grid node determines the flow field speed.