Design of the Automatic Control System for Transfusion in the Therapy
ZHANG Zhi-yan1,2, YANG Xiao-liang2, MA Hong-zhong1(1.College of Power Science and Technology,Hohai University,Nanjing 210098,China;2.College of Electrical and Information Engineering, Zhengzhou University of Light Industry,Zhengzhou 450002,China)Abstract:To overcome the shortages of fluid measurement and speed control of transfusion in the therapy, an intelligent speed control system for transfusion is present. The device is the use of infrared photoelectric sensor to achieve the measurement of droplet and the liquid level, and use a total collector capacitance amplifier circuit, filtering circuit and hysteresis comparision circuit in order to realize signal processing. The system is able to achieve the fluid speed of calculation and display, as well as forced alarm at the process of transfusion and automatic alarm at the end of transfusion. The main structure is of character novel design and small size easy to operate, and the test results show that the system has the following advantages, such as less power consumption and safe and reliable usage.Key words:automatic detection;speed;transfusion;control
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