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1. BIOMEDICAL PROJECTS-An Infant
Monitoring System Using CO2 Sensors
Hung Cao; Lun-Chen Hsu; Ativanichayaphong, T.; Jeongsik Sin; Stephanou, H.E.; Chiao,
J.-C.
RFID, 2007. IEEE International Conference on
Volume , Issue , 26-28 March 2007 Page(s):134 - 140
Digital Object Identifier 10.1109/RFID.2007.346161
Summary: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
CO2 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.
INFANT INCUBATOR PARAMETER SENSING AND
MONITORING THROUGH WIRELESS
We have Designed a system which comprises of essential hard
ware and software for monitoring the parameters through wireless
Communication.
To control the temperature of the air adjacent an infant in an
incubator. is to circulate the air within an incubator with a blower
driven by a motor and to vary the blower speed based on the
temperature of the air within the incubator.
Thermistors for sensing air temperature and motor controllers
are known and have been used to control the temperature of the air
adjacent an infant in an incubator and to reduce the blower speed and
thereby the associated noise in the enclosure.
It is also necessary to monitor the CO2 Level in the incubator

2. Frequently, so that if the CO2 Level increases, In such a case, a
oxygen valve is also actuated , for the infant to breathe properly.
We have to attach transducers to infants in an incubator to
directly measure the infants temperature, respiration rate, pulse, and
other physiological parameters and sent to a remote computer through
wireless for processing the data.
Sensors Involved in Measurement:
1. Co2 Sensor
2. Thermistor
3. Heart Beat Sensor

3. Block Diagram:
Wireless RF
Receiver
433.92MHZ(FSK)
Wireless RF Driver CKT
Transmitter PIC
433.92MHZ(FSK) Microcontroll
er PIC
AIR Blower
16F877
+12V DC
POWER Signal Conditioning
SUPPLY Circuits(ANALOG)
CO2 Heart beat
Thermistor
Sensor Sensor

4. Block Diagram:
Wireless RF
Receiver
433.92MHZ(FSK)
Wireless RF Driver CKT
Transmitter PIC
433.92MHZ(FSK) Microcontroll
er PIC
AIR Blower
16F877
+12V DC
POWER Signal Conditioning
SUPPLY Circuits(ANALOG)
CO2 Heart beat
Thermistor
Sensor Sensor

5. Block Diagram:
Wireless RF
Receiver
433.92MHZ(FSK)
Wireless RF Driver CKT
Transmitter PIC
433.92MHZ(FSK) Microcontroll
er PIC
AIR Blower
16F877
+12V DC
POWER Signal Conditioning
SUPPLY Circuits(ANALOG)
CO2 Heart beat
Thermistor
Sensor Sensor

6. Block Diagram:
Wireless RF
Receiver
433.92MHZ(FSK)
Wireless RF Driver CKT
Transmitter PIC
433.92MHZ(FSK) Microcontroll
er PIC
AIR Blower
16F877
+12V DC
POWER Signal Conditioning
SUPPLY Circuits(ANALOG)
CO2 Heart beat
Thermistor
Sensor Sensor