炉口火焰信息用于转炉炼钢终点判断.doc

摘 要 提出了将炉口火焰光强及图像信息相结合用于转炉炼钢终点判断的新方法，构建了相应的实验研究系统。该系统主要包括炉口火焰光强信息采集、炉口火焰图像信息采集、炉口火焰光强及图像数据分析、处理软件等几部分。重点是设计炉口火焰光强及图像信息采集与数据处理部分：采用单片机为核心器件设计了炉口火焰光强信息的采集电路，通过串口将采集的数据送入微机进行实时处理并编制了相应的分析处理软件；利用望远系统以及数字摄像系统构建了炉口火焰图像采集系统，选择了特定的火焰图像数据处理方法，编制相应软件获取火焰图像数据中对终点判断有用的信息，并利用该信息与光强信息结合对终点进行判断。对所设计的硬、软件系统进行了调试并用于现场实验。通过对实验结果的分析表明，炉口火焰光强与图像信息与转炉炼钢脱碳速度之间存在着明显的联系，进而所获得的炉口光强及图像信息可用于转炉炼钢在线终点控制。 关键词：火焰图像处理 光强采集 炼钢 终点控制 ABSTRACT A new method to control end-point of basic oxygen furnace (BOF) is put forward. This method is based on the combination of the light intensity radiated from the mouth of furnace and the flame image off the mouth of furnace. The experimental system is established, which includes light intensity collecting system, flame image capturing system and the data analysis and processing system. The most important parts of the whole system are signal capture subsystem and data analysis subsystem. A microchip was used to build a light intensity collecting and processing circuit, and the data are sending to computer for analysis. Software to communicate and processing the data has developed; the flame image capture system consists of a telescope and digital camera. The method for flame image processing is chosen, the software to analysis the image date and obtain useful information to do end-point control has also developed. The hardware and software were debugged and were used in the experiments on line. The experimental results show that the method could meet the demands of dynamic end-point control of blowing process for BOF on line. KEY WORDS: image process light intensity collect steel-making end-point control 目录 摘 要 I ABSTRACT II 目 录 III 1 绪论 1 1.1选题背景及意义 1 1.2转炉炼钢简介 2 1.3终点控制的现状 3 1.3.1人工经验控制 3 1.3.2静态控制 3 1.3.3动态控制 4 1.4新型的终点控制方法 5 1.4.1光学方法 5 1.4.2图像方法 6 1.5本文的工作 6 2 系统基本原理及组成 9 2.1系统基本原理 9 2.2系统基本组成 10 3 光强采集系统 11 3.1光强采集系统整体设计要求 11 3.2光学系统设计 11 3.2.1光强采集系统设计 11 3.2.2光纤集光系统设计 12 3.2.3光纤的选择 12 3.2.4光源与光