Research Of A Digital Sleep Respiration Collection Instrument Based On ARM

Sleep is the basic physiological activity of humans,and the quality of sleep can reflect the health of human body.As accelerating the pace of life and changes of lifestyle in modern society,the incidence of insomnia,snoring and apnea has increased significantly,which has seriously affected people's health,quality of life and work efficiency.The digital sleep breath collection instrument based on the ARM can measure human's oxygen saturation of blood and respiratory pressure.The data is handled and storaged by the instrument.The instrument is based on STM32F103 which is the Cortex-M3 infrastructure.The instrument includes Blood Oxygen Module,Respiratory Pressure Module,SD Card and LCD Screen.ST company provides a large number of library functions which makes programming easy and stable operation.The oxygen content of blood can be obtained by Digital Blood Oxygen Module which can output digital signal through the serial port.The hardware connection is simplified for the characters of Digital Blood Oxygen Module.The value of respiratory pressure can be measure by SM9541 chip that is small volume.The reliability of data is enhanced for two bit state.The flexibility can be raised for some modes that can be choosed.The data of patient and status of equipment is displayed on LCD.The instrument is controlled by key and menu.The data can be saved by SD Card for a long time because it has large storage capacity which can more accurately reflect the patient status.It is convenient to transmit data for the Hot-Plug of SD Card.SD Card is controlled by FATFS file system.Docking with computer can be achieved through the configuration of the underlying driver.The instrument is made of Blood Oxygen Module,Respiratory Pressure Module,SD Card,LCD Screen.The applicability of instrument is enhanced because it makes no influence on patients.