Signal Acquisition and Processing System For Diagnosis of Cardiac Malfunctioning

Abstract

The aim of the project was to design a signal acquisition and processing system for diagnosis of cardiac malfunctioning. The electrocardiograph (ECG) machine currently being used employs conducting gel and contact electrodes and gives out fused output. This project gives independent outputs corresponding to each sensor data and makes use of sophisticated signal processing tools. As the oxygen is pumped into the blood, the colour of blood changes from blue to red. Light is passed through the blood and then detected on the other side by the receiver. The received light indicates the change in intensity of the signal, which in turn reflects heartbeat. Received signal from receiver was amplified, filtered and then passed to the computer via analog to digital converter. Matlab was used to process the signal and a ‘C’ program is used to receive signal from computer port. The required information about signal was to be displayed on to computer screen, which was printable as well.