河工模型断面垂线流速自动测量系统的研制

Research and Development of Automatic Measuring System of Cross-section Flow Velocity in the Model for River Engineering

针对目前河工模型试验测量断面垂线流速还需要通过人工定位测量的问题,开发研制出具有全自动功能特征的断面垂线流速自动测量系统。测量系统结合二维平面自动定位测桥,自动三维地形仪等先进技术,在将断面地形的测量数据用于垂线流速测点定位的基础上,增加了断面水面边界的测量,既为流速传感器定位范围提供依据,也为后续计算提供依据,同时采用多流速传感器快速定位同步测量的方法,在实现大面积流速同步测量技术上有所突破,解决了人工测量定点速度慢、效率低的问题,适应了模型试验发展需求,提升了河工模型试验研究水平。

In the present,in the river model test of measuring flow velocity in the vertical direction,manual positioning is needed. With respect to this situation,we developed an automatic system of velocity measurement for crosssection,combined with advanced techniques such as a 2D automatic positioning instrument for measuring bridge and a 3D automatic measuring apparatus for topography. On the basis of measured data of cross-section topography,the measurement of water surface boundary is added,which can be used for subsequent calculations and the determination of positioning range for flow velocity sensor. In this system,we also use multiple sensors for rapidly synchronous measurements. This work brings technological breakthroughs in synchronous measurements for large-scale regions,and solves problems of manual positioning measurements such as low speed,low efficiency,etc. Finally,the system can not only fulfill the developing demand for model experiments,but also improve the research for model experiments in river.