Low-power Technology In The Application Of Insulin Pump

Diabetes has become the third-largest chronic disease after the heartcerebrovascular disease, and malignant tumor’s disease which threats human health.To the May2013, diabetes patients in China have exceeded92million, and theincidence of the disease in large cities such as Beijing and Shanghai has becomemore than10%, therefore, advocating a healthy lifestyle and "early diagnosis, earlytreatment" for diabetic patients has become the key of diabetes prevention andcontrol.Among diabetic patients, patients with type1diabetes (type of insulindependent) must accept insulin infusion treatment, and the insulin infusion ofinsulin pump is the best way of delivery. At present, Medtronic712intelligentopen-loop insulin pump of foreign brands has dominated the insulin pump market inour country, and the domestic brands has just been getting started. The keytechnologies on dosing accuracy, low power consumption strategy, systemintegration and security protection system need to be improved.As a battery-powered active medical device, low power consumptiontechnology behaves particularly outstandingly in the use of the insulin pump. Toachieve the targets that a section3watt battery can support the insulin pump workfor9days, this article focuses on low-power technology in the pancreatic hormonepump applications. Specific content is as follows:First of all, based on the mechanism analysis of pancreas secreting insulin toregulate blood sugar level, the working process of insulin pump is designed; theenergy consumption of insulin pump is achieved, and an overall scheme ofone-battery-energized insulin pump control system is designed. And based on thisdesign the principle analysis of chip power analysis and the selection of componentsis completed.Secondly, according to the overall design and the selection of low powerdevices of the control system, a low power consumption control system prototype isset up. Based on the control system prototype and insulin pump pancreas workingmode, the theoretical power consumption and analysis of the insulin pump is carriedout, the power consumption distribution chart has been obtained, and the maximum power consumption of the system has been obtained as well which comes to theinsulin infusion module.Then, integrating insulin pump delivery precision and low power consumptiondemand of insulin infusion module which is the maxium power consumption module,the low-power-consumption strategy of joining incremental PID controller andfuzzy PID controller in the motor speed loop and position loop are adopted, whichhas been simulated in MATLAB, and the simulation results show that adoptingincremental PID controller and fuzzy PID controller in low power control strategycan achieve good results of control effect.Finally, to test and verify the feasibility of the overall control scheme and theeffectiveness of this control strategy, test platform on the basis of the systemprototype is built. For insulin infusion unit, the actual electric current and the timeof work in the presence of low power consumption control strategy are tested.Experimental results show that the design of the overall control scheme and lowpower consumption control strategy can meet the requirement of insulin pump workwhich can continuously work for more than9days.