Wireless Pulse Oximeter
Format
SOECS Senior Project Demonstration
Abstract/Artist Statement
The Wireless Pulse Oximeter (WPO) is a medical acquisition device aimed at neonates, babies and children. Reasons for such a device are that children tend to be very mobile, thus giving ground for erroneous constant data acquisition when many wire connections are involved. That is why the WPO is an ideal solution. It can be optimized for use in neonate intensive care, where several sensor remote units could feed data to one main station. The design of the WPO involved thorough research, which yields the product at hand. WPO uses an 8051 microcontroller as the core, which for this project acts on behalf of two separate units: main station and remote sensor unit. The WPO collects data by interpreting the relationship between the red and infrared light passage through a pulsatile bed. That signal is passed through a filter, filtering out large noise components that may be present, and is fed into the ADC of the microcontroller. There, the signal components received and a look-up table is used to derive the SpO2 value, which is transmitted through the UART to the main unit. The main unit displays this information on a 7-segment LED display. The sensor unit is driven by the PWM function of the microcontroller, where each of the diodes is switched to conserve power.
Location
Pacific Geosciences Center
Start Date
30-4-2005 2:00 PM
End Date
30-4-2005 5:00 PM
Wireless Pulse Oximeter
Pacific Geosciences Center
The Wireless Pulse Oximeter (WPO) is a medical acquisition device aimed at neonates, babies and children. Reasons for such a device are that children tend to be very mobile, thus giving ground for erroneous constant data acquisition when many wire connections are involved. That is why the WPO is an ideal solution. It can be optimized for use in neonate intensive care, where several sensor remote units could feed data to one main station. The design of the WPO involved thorough research, which yields the product at hand. WPO uses an 8051 microcontroller as the core, which for this project acts on behalf of two separate units: main station and remote sensor unit. The WPO collects data by interpreting the relationship between the red and infrared light passage through a pulsatile bed. That signal is passed through a filter, filtering out large noise components that may be present, and is fed into the ADC of the microcontroller. There, the signal components received and a look-up table is used to derive the SpO2 value, which is transmitted through the UART to the main unit. The main unit displays this information on a 7-segment LED display. The sensor unit is driven by the PWM function of the microcontroller, where each of the diodes is switched to conserve power.