水工模型试验中测压排测值图像数字处理方法

Application of digital image processing technology in hydraulic model experiment

时均压强在水力学模型试验研究中是一项非常重要的数据参数。测压排是水力学模型试验中测量时均压强最直观最经济的一种测量工具。本文结合白鹤滩大型水电站泄洪消能的对比方案进行物理模型试验,开发了以测压排时均压力测量系统为基础的数字图像处理程序,从原始的实测图像中的坡度值入手,设计了一种更为便捷可行的数据自动读取方法,通过在软件平台上进行工具模块的集成,从而达到批量化自动处理测压管水头数据,得到时均压强结果的目的。经过应用实例的检测表明:数字图像处理技术较好的解决了传统方法人工读数工作量大的问题,而且切实可行、高效。

Time-average pressure is a very important data in hydraulic model test research.The piezometer tubes is the most direct and economical measuring tool in the hydraulic model test.Combined with the comparison-study on the flood discharge and energy dissipation of Baihetan Hydropower Station,a new method by the digital image processing technology,which is based on measuring system of piezometer tubes,has been developed to automatically obtain data through differences of gray value,by the tools module of the integrated software platform to achieve the bulk of the automatic processing of photographs,so as to achieve the purpose of batch data processing.After the detection of the application example,we can find that the method not only solves the problem of the traditional methods of artificial reading a heavy workload,but also has feasibility and efficiency.