The Design Of Crystal-growth Information Acquisition And Processing System Based On SOPC

Along with the rapidly developing of computers and electronic information technology, in the fields of industrial design and manufacture, SOPC, FPGA and image processing technology has been widely used. Microelectronics technology plays an irreplaceable role in the development of our country and the world’s information technology industry, and integrated circuit(IC) industry is the basis and core of microelectronics technology. In the IC design and processing industries, silicon integrated circuits accounted for an important position, production and manufacture of silicon rods also become the basis for the rapid development of the integrated circuit industry. In this background, the article is to design and implement the system of crystal-growth’s information acquisition and processing based on SOPC. The purpose and importance of the design is that, in the entire video capture and display, image processing and information detection field, introducing a small and intelligent embedded machine vision system, so as to meet the demands of related production detection in industry, agriculture, services filed.System’s design is based on FPGA developing platform, and by writing Verilog HDL and C procedures and structing the SOPC system, to achieve the crystal-growth information’s gathering and processing in the end. According to the system’s demands, divid the system into two parts, namely, designing video capture and display, processing monocrystalline image and designing diameter’s measure algorithm. The first part mainly designs I2C bus configuration module, ITU-R656video decoding module, video frame buffer module, color space convert module and VGA control module, and configures the Nios II soft core processor and associated peripheral devices, at the same time, connects the various modules, processors, peripheral devices together through Avalon bus, achieved the SOPC system’s integrated development. In the second part, for the collected monocrystalline image, paper designs a gray, histogram analysis, threshold segmentation and edge detection processing algorithms, extracts the heat release halo’s edge feature information. When detecting diameter information, using draft tube’s "reflex aperture" to calibrate the pixel equivalent, and using the "least squares method" to complete the heat release aura’s arc fitting, in order to achieve the test of "heat release aura",and calculate the diameter information of silicon rods. For the errors exists in the system, analysis the cause and correcting the errors, to heighten the system’s measurement accuracy.In this paper, the design of the system is based on the FPGA developing platform to build the SOPC system, the purpose is to achieve information collection and processing in crystal’s growing process. Compared with the conventional method, this system Combines the advantages of FPGA technology and advanced design methods, which has the adventage of small size, high efficiency and low cost. System’s further mending can be more widely used in video acquisition and processing systems, security monitoring systems, and video transmission systems.