半球点法试样熔化过程像识别的初步研究.docVIP

毕业论文 半球点法试样熔化过程图像识别的初步研究 专 业：冶金工程 材料科学与工程学院 二○一五年五月 摘 要 熔点是冶金炉渣的一个非常重要的物化性质，对于炉渣的熔点的测试，通常采用半球点法，具有更高精度的测试仪器的开发具有很大的实际意义。而图像识别，是利用计算机对图像进行处理、分析和理解，以识别各种不同模式的目标和对象的技术。利用传感器对事物图像的采集、处理和识别，其无论在工业、农业、科技、国防上都具有重大的利用价值和广阔的发展空间。半球点法熔点仪的研发中，最重要的是通过计算机图像识别技术对试样的高度进行自动识别。其中计算机控制系统由SDK_2000视频采集卡、RS232串口以及温度控制器组成。利用SDK_2000其本身附带的采集控件，使用MATLAB编程语言从外部视频输出端获得视频信号，并通过计算机图像识别技术检测出所得图像的边缘，从而对试样的开始熔化温度、半球点温度和流动温度时的试样高度进行自动识别。加入5%的Na2CO3后的试样在1200℃产生气泡干扰试样边缘识别，而采用Canny算子检测出图像的边缘，再集合边缘点的坐标寻求出试样的高度。 关键词：半球点，MATLAB，图像识别，边缘识别，Canny ABSTRACT The melting point is a very important physical and chemical properties of the metallurgical slag, for the test of slag melting point, we usually use hemisphere point method, it has great practical significance to develop the accuracy of the test instrument. And the image recognition, is a kind of technology that can identify different patterns of target and object, and this technology is using computer to processing analysis and understand the image. It has great value and broad space for development to use the sensor to collect, processing and recognise the image, whether in industry, agriculture, science and technology and national defense. In the research and development of the hemisphere point method for melting point apparatus, the most important is through computer image recognition technology for automatic recognition on the height of the sample. Computer control system consists of SDK_2000 video capture card, RS-232 serial port, and temperature controller. Using SDK_2000 that came with the acquisition of it’s own controls, and using MATLAB programming language obtained video signals from external video output, to get the image’s edge and automatic identification of the high degree of the sample. The experimental results data show that:(1) You can record videos or manual continuous shooting and save images;(2) To automatically identify the image height Key words: point of the hemisphere, MATLAB, image recognition, edge recogn