血球儀數(shù)字化關鍵技術研究
[Abstract]:In modern medicine, blood cell meter can quickly detect the main components of human blood, and occupies an important position in clinical medicine. The early blood cell instrument in China was limited by the conditions at that time, and the analog circuit was basically used to identify the blood cell signal. This method can not identify the more complex signal, resulting in leakage or miscalculation. In addition, the analog circuit is used to identify the blood cell signal, the circuit volume is large, the debugging is difficult, and the circuit parameters are easily affected by the environment, which leads to the inaccurate recognition statistics. With the development of integrated circuit and EDA technology, digital technology has been more and more widely used in all aspects of social production. The digital detection method is not easily interfered by power supply and can identify complex signals. The circuit is simple and stable. Digital detection of blood cell signal is undoubtedly one of the best ways to solve the above problems. In this paper, according to the requirement of digital blood cell instrument, through the analysis of blood cell signal, a state analysis and recognition algorithm which is easy to be realized in FPGA is proposed, and the design of three-channel blood cell analysis device is completed in Cyclone II series FPGA (EP2C35). On this basis, the Nios II processor, LCD controller, blood cell recognition device and other functional modules are realized in a single FPGA by using SOPC technology, which reduces the circuit board volume of the blood analyzer and reduces the implementation cost. At the same time, the performance of blood cell meter recognition and statistics is improved. In addition, the high speed data acquisition circuit, four-wire resistance touch screen controller and blood cell signal generator are designed to form the whole hardware platform of blood analysis. In the integrated development environment of Nios II, the human-computer interaction system of blood analysis is completed by using the small and practical 渭 C/OS-II real-time operating system and user graphical interface 渭 C/GUI, and the whole application program is designed in the human-computer interaction system. Finally, the reproducibility and linearity of the blood cell instrument were tested by using the quality control blood and blood cell signal generator. The results show that the blood cell instrument meets the requirements of the National Pharmaceutical Industry Standard of Blood Analyser on these two indexes and can be used for clinical medical diagnosis.
【學位授予單位】:寧波大學
【學位級別】:碩士
【學位授予年份】:2012
【分類號】:TH776;R318.6
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