空化和空蚀论文水力机械试验台图像监控系统的研制.docVIP

空化和空蚀论文：水力机械试验台图像监控系统的研制 【中文摘要】随着我国经济的快速发展,对电能的需求量日益增长。目前我国的电能的主要来源还是火力发电站,这种电能的生产方式对环境构成了巨大的危害,这显然与日益深入人心的环保理念和人们追求高品质生活的愿望背道而驰。水力发电是目前对环境造成负面影响最小的电能生产方式之一,大力发展水电已成为解决人们对电能的需求与环境保护之间矛盾的重要途径。现在水力发电站的自动化程度越来越高,结构越来越复杂,无论哪个部件出了问题都会影响到机组的正常运转。水轮机是机组中的关键部件,也是事故率最高的部件之一,因此,合理地设计水轮机,减小空化效应对它的影响已成为水轮机生产厂家要面对的重要问题。通过水轮机试验台获得的空化和空蚀的图像资料是设计水轮机的重要依据。本文从当前检测水轮机工作时空化和空蚀的几种方法出发,设计出用成像的方法获取空化空蚀图像资料的系统。系统包括图像采集、图像传输、由PC机组成的图像数据处理系统、同步触发信号发生模块等子系统。本文的主要部分的结构是首先介绍了整个系统的硬件组成,接着是同步触发信号发生模块的软件设计,最后是上位机应用程序的软件设计。在硬件的设计中,同步触发信号发生模块部分用到Protel DXP软件绘制原理图和制作PCB板。在软件设计中,同步触发信号发生模块的软件用Keil C51编写;上位机应用程序用VS 2010软件编写。经过调试和测试,系统正常工作,达到了既定的目标。 【英文摘要】Along with our country’s rapid economic development, the demand for electricity is growing. At present, Coal-fired Power stations is still the main source of electricity energy. This mode of production of electrical energy poses a great danger to the environment. This is obviously contrary to the concept of environmental protection and people’s desiring to pursue high quality of life. Hydropower is one of the power- production ways which are the least negative impact on the environment. Vigorously to develop hydropower has become an important way to solve the conflict between the great demand of energy and environmental protection. Hydroelectric power stations are becoming more and more automated and complex, no matter which parts of the station facing a problem would affect the normal operation of the unit. Turbine is the key component in the hydropower station and is also the highest accident rate component. Therefore, rational designing turbine to reduce the impact of cavitation has become an important issues turbine manufacturers have to face. The cavitation and cavitation erosion’s image data obtained through the experiment is an important basis for the design of turbine.This article takes current several ways of inspection of turbine cavitation as a starting point to design a system to obtain cavitation image data. Total system includes image acq