DESIGN AND FABRICATION OF AN AUTOMATED LAWN MOWER
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Abstract
An automated lawn mower is a machine designed to cut grass without requiring human guidance or control. With the continuous advancements in technology, automation has become integral to nearly every aspect of modern life. From household appliances to industrial machinery, automation has transformed the way we interact with our environments, reducing manual labour and improving overall efficiency. The emergence of automated lawn mowers follows this trend, replacing the conventional lawn mowing technology that demands significant human effort. This work aims to develop an improved automated lawn mower that
is both economically accessible and user-friendly, designed with locally sourced materials to minimize production costs. Unlike the existing robotic lawn mowers technologies, our model emphasizes a simple design making it easy to maintain and repair without specialized tools or skills. It is equipped with advanced sensor technology like the HC-SR04 ultrasonic and infrared sensors for obstacle detection and avoidance within the ranges of 10 to 50cm. When operating at a distance beyond 50cm, the mower consistently moved forward indicating an environment with no obstacles. Within a range of 30 to 50cm, the system effectively slowed the mower, achieving a 150millisecond response time and 98% accuracy. At closer proximities of 10 to 30cm, the mower reversed and turned with a slightly reduced accuracy of 95% and a 180millisecond response time, while obstacles detected at less than 10cm prompted at immediate stop within 120milliseconds at a 97% accuracy rate. It also integrates a 5kHz electromagnetic perimeter wire for systematic navigation and is powered by an 18V DC rechargeable battery, making it both sustainable and eco-friendly.
is both economically accessible and user-friendly, designed with locally sourced materials to minimize production costs. Unlike the existing robotic lawn mowers technologies, our model emphasizes a simple design making it easy to maintain and repair without specialized tools or skills. It is equipped with advanced sensor technology like the HC-SR04 ultrasonic and infrared sensors for obstacle detection and avoidance within the ranges of 10 to 50cm. When operating at a distance beyond 50cm, the mower consistently moved forward indicating an environment with no obstacles. Within a range of 30 to 50cm, the system effectively slowed the mower, achieving a 150millisecond response time and 98% accuracy. At closer proximities of 10 to 30cm, the mower reversed and turned with a slightly reduced accuracy of 95% and a 180millisecond response time, while obstacles detected at less than 10cm prompted at immediate stop within 120milliseconds at a 97% accuracy rate. It also integrates a 5kHz electromagnetic perimeter wire for systematic navigation and is powered by an 18V DC rechargeable battery, making it both sustainable and eco-friendly.
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