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Autonomous Robotic Lawn Mower

Consumer electronics Robotics Computer vision Embedded software development Embedded hardware development Firmware development R&D

Mowing the lawn is tedious work. And it's a year-round project. But it doesn't seem so
tedious once there is a robotic lawn mower ready to do the job for you. 

Request

A company in the consumer robotics industry was working on a robotic mower. They needed a professional company that could provide an independent design review for their first version of the printed circuit board that had been created by another electronics design company. Integra Sources' expertise and our ability to predict possible risks impressed the client so he decided to continue the development of the robotic mower with our company.

We were chosen to build peripheral device drivers for the first version of the lawn mower and then continued working on the second, more advanced version of the circuit board.

Solution

Our major goal was to develop a machine that could independently cut grass in specified areas of home gardens with minimal supervision. We achieved it by doing research, designing a robotic movement mechanism with electronic control circuitry and programming the controller.

We went through several iterations to build the electronics and develop firmware for the robot so it could meet the customer's expectations. The main challenge was to keep within the budget for hardware components. Our client wanted to make the lawn mower accessible to the mass market. Therefore, it needed to be cheaper than its competitors.

Main PCB and other parts of the robot lawn mower
Main PCB and other parts of the robot lawn mower

Technologies Used


Result 

Integra Sources managed to put the project on solid technical footing while lowering the estimated cost of the development effort required. We provided hardware design, prototyping, firmware development, and testing.

The delivered result is a fully completed hardware solution for an autonomous robot that doesn't need any supervision. The robotic lawn mower is equipped with algorithms and sensors – camera, accelerometer, gyroscope – that allow the robot to map the area it's about to work on. It's also equipped with a charger and a Wi-Fi and 3G module.

To set up the area of operation, you just need to walk around the lawn with the robot so it remembers where to work. After that, it is ready to cut the lawn’s grass 24/7 and will charge itself when it runs out of battery.


Scope of work

Embedded hardware development

This project is based on STM32F4 microcontroller and runs on RTOS. The robot has a lot of peripherals including WiFi, GPS, GSM, camera, IMU, wireless module NRF24L01, and LCD display.

Firmware development

We implemented low-level firmware programming for the circuit board.

Embedded software development

The OpenCV based computer vision autonomous navigation system allows the lawn mower to detect and identify obstacles and boundaries.

 
 
 
 
 
 
Prototype assembly process

The functionality of the lawn mower

We implemented low-level firmware programming, prototyping and higher-level logic such as computer vision and visual odometry. The robot has a graphical interface, it charges in an hour and has a smart autonomous workfl ow. Its functionality includes:

Integra delivers what they say they’re going to deliver. I’d say their flexibility is their most impressive feature. They can do the whole stack, from very low-level analog circuits all the way up to and through complex digital circuits and software.

CEO of Robotics company

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