DESIGN OF AUTOMATED LAWN MOWER

SUBMITTED BY :BARATH MANOHARAN 1217549

NIBIN T KOSHY 1217541PRANAY UDAY 1217531

Under the guidance ofJAMES SATHYA KUMAR

Associate Professor

DEPARTMENT OF MECHANICAL ENGINEERING FACULY OF ENGINEERING,CHRIST UNIVERSITY

Kengeri-Campus,Bangalore-560074

Result 20Conclusion 21Video 22References 23

ContentsTitle Slide No.

Introduction 3Objectives 4Literature Survey 5-7Flowchart For Methodologies

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Actual Work 9Drawing 10-13Fabrication 14-15Circuit Diagram 16Arduino Programming 17-18Working 19

INTRODUCTION

Mowing lawns is a labor intensive activity. A Robotic Lawn Mower is an autonomous robot

used to cut untrimmed grass. The intended controller is fully automated and

avoids obstacles in the work environment. The final outcome of the proposed work would be a

non-polluting, cost efficient and safe robot lawnmower that can also be used for small scale and large scale lawns and fields.

 

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OBJECTIVES To design and fabricate an

automated lawn mower which requires minimum human supervision.

The lawn mower is to be programmed using the Arduino board and the Arduino IDE.

Design is intended to be simple and effective thereby making lawn mowing inexpensive.

Literature Survey• Dinesh Kumar,Rajesh Birua,Sarmistha Mondal, ManasKr.

Parai,Rakesh Chandra Kumar, Md. Saddam Khan, “Obstacle Avoiding Robot – A Promising One,” International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering Vol. 2, Issue 4, April 2013

For robotic lawnmower, infrared sensors were used to detect the obstacles on the path and then avoids the obstacle.

IR transmitters are used to continuously generate a signal of 38KHz.

The infrared signal gets reflected back from the object and this generates a positive high signal informing the robot about obstacle.

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Literature Survey• Pratik Patil, Ashwini Bhosale, Prof. Sheetal Jagtap, “Design

And Implementation Of Automatic Lawn Cutter,” International Journal Of Emerging Technology And Advanced Engineering , Volume 4, Issue 11, November 2014Options for autonomous control of robotic platform

This design contains a microcontroller ATmega 16, multiple sensors, LCD display, keypad and rechargeable battery.

The design was adapted to hydrogen by making small adjustment to carburetor and by installing a hydrogen reservoir containing solid state metal hydrides.

They used an ultrasonic sensor to detect if the lawn mower was heading into an object.5

Literature Survey• Junho Yang, Soon-Jo Chung, Seth Hutchinson,

David Johnson, and Michio Kise, “Vision-Based Localization and Mapping for an Autonomous Mower,” IEEE Control Systems Volume 27,2007.

The task of robotic mowing was divided into teaching phase and a moving phase.

During teaching phase the mower guesses the 3D positions of landmarks and defines a boundary in the lawn with an estimate of its own trajectory.

Measurements taken from an omnidirectional camera an IMU and a ground speed sensor are used for its estimation.

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FLOWCHART FOR METHODOLOGIES

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ACTUAL WORK1. A brief study and survey on automated lawn mower has been

carried out.2. 3-D modeling has been done using Solid Edge.3. The frame of the platform fabricated using hollow rectangular tube

made of mild steel material.4. Nylon wheels are attached to the 6mm motor shaft via a holder.5. The circuit components are attached to top of the platform.6. Sensors are attached to the front of the platform.7. Cutter attached to the platform using MIG welding techniques.8. Microcontroller programmed using Arduino IDE.9. A working model is finished as per requirement.

Drawing

Fig: Components of push reel cutter (www.gardening.stackexchange.com) 10

Drawing

Fig:Isometric View of Automated Lawn Mower

Drawing

Fig:Labelling of The Lawn Mower

Drawing

Fig:Dimensions of ALM

Fabrication

Fig:Fabrication of Platform

Fabrication

Fig: Assembled model of cutter with platform

Circuit Diagram

Fig: Wiring diagram of automated lawn mower

Arduino Programming

Fig: Coding For Initializing Arduino Pin And Controlling DC Motors

Arduino Programming

Fig: Coding Used For Sensors

Working

Table showing wheel direction for obstacle avoidance

Results The fabrication of an automated lawn

mower which requires minimum human supervision is complete.

The lawn mower functions using the arduinoboard and is coded using the arduino IDE.

The design is simple and effective. The lawn mower is able to trim grass inexpensively as the entire system is powered by a single 12V 1.2 Amp battery.

Conclusion An automated lawnmower which uses minimum

human intervention is designed and developed. The design incorporates programming using an

Arduino controller and is programmed using Arduino IDE.

The developed controller is simple, effective and is not power hungry.

3D modelling of the entire setup was carried using Solid Edge V18 software.

The platform fabricated as per the 3D modelling and houses all the electronic components.

Wheels are made of nylon are attached to the 12V DC motors for the smooth movement of the lawn mower.

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WORKPLANMONTH WEE

KOBJECTIVE

NOVEMBER 1-2 BRAINSTORMING, PROJECT TITLE3-4 METHODOLOGY, SYNOPSIS

DECEMBER 1-2 PRESENTATION, CAD MODEL DESIGN3-4 COMPONENT LIST, BUDGET

PLANNING, SYNOPSISJANUARY 1-2 DETAILED DESIGN, COMPONENT

PURCHASING3-4 PROCUREMENT , SYNOPSIS

FEBRUARY 1-2 MANUFACTURING, ASSEMBLING3-4 CODING & EXPERIMENTING, SYNOPSIS

MARCH 1-2 MOVEMENT TESTING,CUTTING TESTING

3-4 TRIAL RUN 1 & 2, PROJECT COMPLETION

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Video

REFERENCES • Dinesh Kumar,Rajesh Birua,Sarmistha Mondal, ManasKr.

Parai,Rakesh Chandra Kumar, Md. Saddam Khan, “Obstacle Avoiding Robot – A Promising One,” International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering Vol. 2, Issue 4, April 2013

Pratik Patil, Ashwini Bhosale, Prof. Sheetal Jagtap, “Design And Implementation Of Automatic Lawn Cutter,” International Journal Of Emerging Technology And Advanced Engineering , Volume 4, Issue 11, November 2014Options for autonomous control of robotic platform

• Junho Yang, Soon-Jo Chung, Seth Hutchinson, David Johnson, and Michio Kise, “Vision-Based Localization and Mapping for an Autonomous Mower,” IEEE Control Systems Volume 27,2007.

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THANK YOU !