Study On Sleep Monitoring Platform Based On Embeded System

Sleep as an important physiological activity of human, plays a vital role inthe life and health of the human body. Also the pulse signal as the most importantphysiological parameters contains wealth physiological characteristicinformation of the human body, which related closely with the good health.Therefore, how to complete the pulse signal monitoring of sleepers timely andeffectively will become the research target. It will provide a reference for theanalysis and assessment of sleep quality and the prevention of illness.The status and trends development of sleep monitoring technology and theapplication of embedded systems are described on this Paper. The sleepmonitoring platform was built by using a combination of embedded technology,wireless communications and virtual instruments. The main contents include:(1) The basic theoretical research of pulse wave. A relationship betweenpulse waveform characteristics of K values and characterization of human bloodpressure, blood flow and microcirculation information parameters was studied inthis paper, and the theory will be realized on the sleep monitoring platform.(2) Hardware design and debugging. Include the circuit design of dataacquisition and wireless transmission. Utilizing the LPC2103as the MCU todesign the peripheral circuits, pulse signal conditioning circuit, the wirelesstransmitter and receiver circuits and the USB to serial circuit was designed tocomplete the communication to the host computer.(3) The software program design. The program was designed to realize thesleepers pulse signal acquisition, transmission and host computer program basedon the virtual instrument. The former utilizes ADS1.2as the developmentenvironment to get the information of pulse signal acquisition, the wirelesssending and receiving of the A/D conversion and signal by programming; usingLabVIEW to realize user management, signal acquisition and storage, signalanalysis and processing, and procedures publishing.(4) The design of system anti-jamming. Complete the design of hardware circuit anti-interference, the filtering software anti-jamming, and employ thecamera of host computer to collect the facial image of those who sleep, store thepulse signal synchronized image information, and then improve the reliability ofthe pulse signal analysis.Finally, the run of the sleep monitoring platform and results analysis areaccomplished by experiment. The results showed that the hardware platformutilizes ARM7as MCU, which is featured by small size, low power consumption,fast processing speed, and no expansion of the A/D converter circuit; the data istransmitted by wireless communications which avoid wiring and reduceinterference; the design of human-computer interaction on the PC usingLabVIEW software program, make the operation friendly and the simply. Theplatform solves the complex problems of traditional methods for sleepmonitoring, and improves the reliability of the assessment of sleep quality.