DEVELOPMENT OF AUTONOMOUS LAWN MOWER FROM LOCALLY SOURCED MATERIALS

A lawnmower is a machine that uses a revolving blade or blades to cut a lawn grass. Many designs have been made, each suited to a particular purpose. Manual grass cutter has environmental issues regarding pollution's and also require the need of man power to operate and has a great maintenance to its engine. This robot is design to be environment friendly and operated by a rechargeable battery and can be describe as an intelligent robot because the micro-controller receives information from several sensors (PIR, Humidity and Bumper switches) connected to it in avoiding obstacle to ensure a neat pattern of cut and use the information to actuate the left and right motors driving the wheels and the center motor driving blade and at the same time it obeys all parameters of work and its program database. The result obtained from the test and analysis carried out shows that our development of the autonomous lawn mower from locally sourced materials is highly recommended because it is safer to use, environmental friendly, easy to operate, and fully automated.

CHAPTER 1: Introduction

1.1 Statement of the Problem

1.2 Objectives of the Study

1.3 Significance of the Study

1.4 Scope and Limitations

CHAPTER 2: Literature Review

2.1 Autonomous Lawn Mower

2.2 Vision-Based Obstacle Detection Lawnmower

2.3 GPS-Aided Autonomous Lawnmower

2.4 Brief History of Autonomous Robots

2.4.1 Lawn Mower, the History

2.5 Cutting Patterns

CHAPTER 3: Methodology

3.1 The Target of the Study

3.2 Block Diagram of the Proposed System

3.3 System Overview

3.4 Microcontroller System Requirements

3.4.1 The PIC16F887 Microcontroller

3.4.2 Interfacing with the microcontroller

3.4.3 Characteristics of a microcontroller

3.5 Lead Acid 12V 7.2AH Battery

3.6 Brush Motor

3.7 Hardware and Software Assembly

3.8 Mechanical System

3.9 Components Used

3.10 Software Used

3.10.1 The Autodesk Inventor Design

3.10.2 The Electronic Circuits Generated by Proteuse

3.11 Design Calculations

3.12 The Controller Circuit

CHAPTER 4: Results And Discussions

4.1 Motor Control Test

4.2 Motor Truth Table

4.3 Navigation System

4.3.1 Movement Stability

4.4 Power Supply and Charging Test

4.5 Cutting Deck

4.5 Efficiency

CHAPTER 5: Conclusions

5.1 Recommendations

5.2 Limitations

References

Appendix A

Appendix B

Appendix C

Appendix D

Appendix E

Acknowledgements

About The Author