Hardware Design Of Multi-Function Monitor

With the increasement of people’s life quality and health consciousness, people are increasingly concerned about the health of themselves and their families. Monitor,as a electronic instrument can continuously monitor the physiological parameters of the human body and reflect people’s health, is becoming a medical equipment of hudge demand. At present,the development of foreign monitor has been very mature.However,domestic development of monitor is still in infancy.So,the study of multi-function monitor is meaningful to the development of domestic monitor.Multi-function monitor can simultaneously detect ECG, blood oxygen, blood pressure, pulse, body temperature and other physiological parameters.The main task of this study is to complete the hardware design of multi-function monitor,mainly including the main control system design, the blood pressure measurement design,ECG measurement design and infusion control design.As an innovation point of this multi-function monitor design,the infusion control design combines monitorring and intravenous to a whole system. The main contents of this thesis are as follows:(1)The main control syetem design: According to the work requirements of monitor, the main control syetem should contains enough resource to meet the control requirements of multi parameter display and infusion requirement. In addition, the control system should also do support the network port and USB communication interface, making the data transfering convenient.(2)Blood pressure measurement design: Through the comparison of common blood pressure measurement methods,the oscillometric method is adopted. On the basis of the character of blood signal, the measurement circuit is designed and the blood preesure is calculated.(3)ECG measurement design: ECG signal is body surface biological signal withl small amplitude、high output impedance and easily disturbance. Thus, the key point of ECG measurement is the ECG signal acquisition circuit design.(4)Infusion control design: Infusion control is mean to achieve accurate control of the infusion speed and the total amount of infusion.In addition, safety of infusion must be guaranteed during the process. In the process of infusion, infusion blockage, bubbles and motor fault detection are designed.Through the test, the multi-function monitor designed can simultaneously control a plurality of functions to work, and blood pressure measurement, ECG measurement and infusion control are all satisfied with the requirements.