Robotic Mower Path Control Using Server-Based GNSS Navigation
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Solution Overview
Problem
Current robotic mowers face challenges in reliable autonomous operation due to safety concerns, requiring sophisticated technology for boundary definition, real-time processing of sensor inputs, and harsh environmental conditions, which increases costs and complexity, especially in multi-robot systems.
Innovation Solution
A robotic mower system equipped with a drive system, mowing unit, sensors, a high-accuracy localization module using GNSS, and a communication unit for wireless communication with a server, enabling precise navigation and control of precalculated paths while allowing for manual override and backup communication links to ensure safety and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If autonomous operation of robotic mower is implemented, then productivity is improved, but reliability deteriorates due to safety concerns and harsh environmental conditions
Solution Approach 1:
A server acts as an intermediary between the robotic mower and the user, receiving sensor data from the mower, processing it, and sending control commands back. This intermediary architecture allows autonomous operation while maintaining reliability by centralizing complex decision-making and safety monitoring functions remotely, reducing the burden on the mower's onboard systems in harsh environments.
Solution Approach 2:
The system is segmented into multiple independent components: the robotic mower handles execution and sensing, the server handles processing and decision-making, and communication links connect them. This segmentation allows each component to be optimized independently - the mower for robust autonomous operation and the server for reliable data processing - thereby improving overall system reliability while maintaining productivity.
2Reliability
If sophisticated technology for boundary definition and real-time sensor processing is used, then reliability is improved, but device complexity increases
Solution Approach 1:
The server serves as an intermediary that centralizes complex processing functions including boundary management, sensor data analysis, and path planning. By moving these complex functions to a remote server rather than embedding them in the mower, the system achieves high reliability through sophisticated processing while keeping the mower itself relatively simple and easier to deploy.
Solution Approach 2:
The patent replaces mechanical boundary definition systems (such as physical fences or boundary wires) with electronic/geofencing approaches using GPS coordinates and digital maps processed by the server. This substitution reduces device complexity by eliminating physical boundary infrastructure while maintaining or improving reliability through flexible, software-based boundary management.
3Reliability
If all required hard- and software is included in each individual robot for multi-robot systems, then reliability is improved, but manufacturing cost increases
Solution Approach 1:
The server provides universal functionality that serves multiple robotic mowers simultaneously. Instead of each robot needing complete autonomous capabilities, the shared server provides centralized processing, boundary management, and coordination for all robots in the fleet. This multi-functional approach enables reliable multi-robot operation while significantly reducing manufacturing costs by eliminating redundant systems in each individual robot.
Solution Approach 2:
The patent merges processing resources and software licenses into a shared server infrastructure that serves multiple robots. By combining these resources rather than duplicating them in each robot, the system achieves reliable multi-robot operation at lower manufacturing costs, as the expensive processing and software components are shared across the entire fleet.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system achieves high accuracy in position control and efficient mowing operations, reducing the risk of collisions and incomplete mowing, while minimizing hardware costs by leveraging advanced navigation and communication technologies.
Implementation Method 1
a localization module (5) which is designed to determine the position of the robotic mower (1) with the help of a global navigation satellite system (GNSS)
Data Source
Figure 1~2
Figure 3
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AI summary
The invention relates to a system and method for controlling at least one robotic mower (1) by means of a server (21). According to the invention the processing resources for the calculation of the working paths (41) within a predetermined working area (40), the monitoring of the position of the at least one robotic mower and the calculation of correction data (25) is provided on a server (21) which is wirelessly connected with the at least one robotic mower (1).