The Family Medical Monitoring System

With the heightened attention to healthy issues,people have put forward the need for portable family medical equipment that monitor their basic physiological characteristics in real time.To meet the demand,this thesis proposes a portable family medical monitoring system based on the concept of wearable device.The portable family monitoring system which is worn on the wrist,monitors the heart rate,blood oxygen and body temperature in real time and transmits the data to Bluetooth-enabled devices(mobile phones or PC)by Bluetooth communication technologyIn this thesis,we firstly research the current status and the existing technical problem of wearable medical devices.Based on the measurement principles of heart rate and blood oxygen the reflective photoplethysmographic is selected to measure heart rate and blood oxygen in this system,the body temperature according to the relationship of temperature with the electric current and voltage of PN junction.Due to the high level of integration and fewer peripheral circuits,the MAX30102 and MAX30205 are selected as the main sensor for measuring heart rate,blood oxygen,and body temperature,which form a physiological information collector.Considering the requirements of small size and low power consumption,this portable family medical monitoring system selected Bluetooth technology to transmit data,and select the n RF51822 that supports Cortex-M0 and Bluetooth 2.4GHz wireless transceiver as the core processor of the system.Secondly,we design the hardware and software of portable family medical monitoring system.The peripheral circuits of MAX30101 and MAX30205 are designed;The PCB of the portable family monitoring system is designed by the Altium Designer and realizes it.The software of the portable family monitoring system include I2 C program,MAX30102 and MAX30205 driver,BLE protocol initialization and transmission protocol,and data processing program.Because the measured result of MAX30102 is voltage,the main processor n RF51822 need extracts and processes the DC and AC signal of the measured results to obtain the heart rate and blood oxygen.In this thesis,we realize the family medical monitoring system,which is small size,easy to carry,and can monitors heart rate,blood oxygen and body temperature in real time.The measured results show that it realized the function of monitoring the heart rate,blood oxygen,body temperature,and transmitting measurement data to the PC through Bluetooth wireless communication technology.