实体模型表面流场、河势测量中图像技术应用研究进展

Review of image processing technique applied to measurement of surface flow field and river regime of physical model

介绍了粒子图像测速技术(PIV)引入水流研究的历程,结合近10年来图像技术的应用及发展情况,讨论了将图像技术应用到流场及河势测试中的图像识别、边缘检测等关键问题的研究进展,并对相关的测试理论进行了探讨.指出,对河工模型表面流场测量中的图像畸变矫正、示踪粒子在三维水流中的跟随性、浑水条件下表面流场的测量以及河势的实时自动提取方面还有待进一步深入研究,将图像技术获得的流场、河势信息与数值模拟相结合实现实时混合模拟是今后的研究方向.

Based on the development and application of the particle image velocimetry （PIV） in recent 10 years, an introduction was given to the development process of PIV technique for water flow research, with focus on advances in research of some key problems, such as image recognition and edge detection in flow field and river regime measurement. Some related theories about measurement were discussed. It is pointed out that the rectifying method of image distortion, the follow property of trace particles, the surface flow field measurement in silt-laden water, and the real-time automatic extraction of river regime should be emphasized in further research, and that the combination of PIV technique with numerical simulation to realize real-time synthetic simulation is the future research direction.