DESIGN AND IMPLEMENTATION OF A LOW-COST EMBEDDED OXIMETER

Abstract

ABSTRACT This thesis presents the design and implementation of a low-cost embedded Oximeter for real-time measurement of arterial oxygen and heart beat rate monitoring using wireless transmission. The design requirements include low cost, small size, light weight, and a wireless communication capability. The proposed design is based on a microcontroller system Atmega32, responsible for generating two non-overlapping square waves used for driving its LEDs. It also has a built-in USART which makes communication easy with PC/Laptop. An ADC is used to convert the signal from Photodiode to digital format, sampling the digital optical signal from Photodiode to calculate (SpO2 and heartbeat rate HR). The Embedded Software was written in C using Codevision AVR for the ATmega processor where Proteus software is used for simulation. The user interface is built in LabVIEW visual programming environment with real-time display of SpO2 and HR, Sofiware for the system provides a mechanism to configure the system according to administrator requirements. The proposed tools enable biomarker parameters to be viewed and managed