| Because the reaction is the average glycated hemoglobin levels in patients with recent 3 months, and not easy to decompose, thus become the gold standard for diabetes detection. Hemoglobin measurement instrument is often the use of ion exchange liquid chromatography, need to quickly put the gradient solution delivery into the column to separate various components, and then calculate the refractive index method.Infusion unit in this paper, it is the human blood and medical specific solution formed by gradient solution, extraction of high-pressure pump rapid transport into the process of separation column, is part of a measuring instrument. High pressure pump solves the problem of rapid transportation problems, forming a gradient solution proportional valve.To use the device with high pressure pump, valve, pressure sensor, LCD and mcu. The design process is given a predetermined speed, constant pressure pump has reached a predetermined speed, the input value of the ratio of two kinds of solution on the LCD screen, and then the proportional valve in accordance with the LCD screen with fixed fusion of two kinds of solution, and a pressure detection system, to prevent excessive pressure caused by dangerous.In order to design a convenient, the infusion unit is divided into 3 modules, respectively is the pump and the proportional valve module, data display module, pressure transmission module, the hardware design and the software design is based on the three modules were designed, and then into a whole. |
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