An Infant Monitoring System Using CO/sub 2/ Sensors

In this paper, we proposed an infant monitoring system to reduce the potential risks for sudden infant death syndrome (SIDS). This system can be used for infants at home or in a hospital nursery room. The system consists of carbon dioxide (CO
₂
) sensors and active radio frequency identification (RFID) technology. A commercial metal-oxide based CO
₂
sensor was chosen and characterized in sensitivity, selectivity and humidity dependence. A proof-of-concept system, to be used for two infants in the same room, was designed and assembled. The RFID transmission was accomplished with a wireless module at two different operating frequencies. The results are promising. A method for further practical applications in a large nursery room is also discussed in details in this paper.