Thesis Abstract

The use of microcontroller is in every field even we can use it in the design and fabrication of biomedical equipments. A little example is here. The microcontroller at89s51 (8051) is here used to develop a heart beat monitoring system. By placing your finger in between a LED and photo resistance, we can detect the pulses of heart, the analog voltages are further processed with an operational amplifier LM 358, this chip has two built in OPAMPs. The TTL pulses or digital pulse are then feed to the external interrupt of microcontroller 8051. By using a software counter in the code, we can count the pulses, and the result the process is displayed on an LCD (2 line 16 characters). The schematic circuit diagram of heart beat monitor is shown below and the code ( c program) in c language using keil C51 uv3 is also shown. This is only test project and any one can copy from it.

Thesis Overview

INTRODUCTION

1.1        Background

One of the most difficult tasks in generating signals is the decoding. It is only when signals are decoded that it can be used for any essential purpose. Frequency happens to be one of such signals that require a careful decoding technique. One important source of signal is the human body, where different types of signals are generated. Biomedical signal such as the heart beat is very essential to the medical expert to be able to ascertain the kind of medical issue with a patient.

This project, Microcontroller based heart beat monitor is a project that is geared toward the development of simple tool to assist the medical experts to check the human heart rate before further diagnosis can be recommended.

1.2        Objectives

The main objective of this project is to design and Implement Microcontroller based heart beat monitor. It is also intended to use this means to contribute to the academic research work.

1.3        Justification

If this prototype is fully developed will be very useful in many areas such as:

a.       Laboratory experiments for measuring frequency.

b.       Apply functions to signals being generated.

c.       Applicable in the hospitals

d.       Educational purpose especially in reversed engineering.

1.4        Scope of the Project

This project makes use of a keypad as the only major input channel. AT89C51 Microcontroller is the main control device. Multi-channel Frequency generators circuits will be realized. Simple interface of output/decoded frequency via LCD will also be built. Programming power of Bascom Basic compiler will be exploited.

1.5        Constraints

One the major constraint of this work was finance. Another like it was in availability of the required information.

1.6     Project Report Organization

This report is organized into six chapters. The first chapter takes care of introduction. Chapter two surveys the literature review of this work. In chapter three, the project analysis was done. The input, processing and output modules are critically analyzed.

In chapter four, system implementation was carefully done. Chapter five takes care of Testing and Implementation. Finally chapter six closes up with summary and conclusions.