Autonomous Lawn Robot Tool Switching for Border Cutting

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Solution Overview

Problem

Existing green area maintenance systems lack the capability to efficiently treat areas with precision and varying conditions, such as border regions, without human intervention and with sufficient kinetic energy for cutting thicker vegetation.

Innovation Solution

A green area maintenance system comprising an autonomous mobile robot with a treatment tool and a cutting tool, allowing for autonomous operation and a switching mechanism between autonomous and cutting modes, enabling the robot to operate independently or under user control with a cutting tool that can achieve higher kinetic energy for more extensive treatments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Extent of automation

If the autonomous mobile green area maintenance robot operates autonomously with treatment tool only, then autonomous operation capability is improved, but the capability to treat border regions and edge areas with sufficient kinetic energy deteriorates

Engineering Contradiction:
Improveautonomous operation capabilityVSAvoidcapability to treat border regions
Core Design Contradiction:
Extent of automationVSAdaptability or versatility

Solution Approach 1:

The system dynamically switches between autonomous operation mode (with treatment tool) and cutting operation mode (with cutting tool) based on the operational requirements. The operation mode switching device enables the robot to adapt its functionality in real-time, allowing autonomous operation in open areas while providing manual cutting capability for border regions and edge areas where higher kinetic energy is required.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The green area maintenance robot is designed with multi-functionality by incorporating both a treatment tool for autonomous operation and a cutting tool for manual cutting operations. This universal design allows the single robot platform to handle diverse maintenance tasks including open area treatment, border region cutting, and edge area trimming, eliminating the need for separate specialized equipment.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Power

If a cutting tool with higher kinetic energy is added to the autonomous robot, then the capability to cut thicker vegetation is improved, but the device complexity increases

Engineering Contradiction:
Improvekinetic energy of cutting toolVSAvoidsystem structure complexity
Core Design Contradiction:
PowerVSDevice complexity

Solution Approach 1:

The cutting tool is integrated with the autonomous robot platform, merging two previously separate functions (autonomous treatment and manual cutting) into a single unified system. The cutting tool shares the robot's mobility system, power source, and control architecture, thereby reducing overall system complexity compared to having separate autonomous and manual cutting devices.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The system employs an operation mode switching device that dynamically activates either the treatment tool or the cutting tool based on operational requirements. This dynamic switching mechanism allows the high-power cutting tool to be integrated into the system without requiring continuous operation, thereby managing power requirements and simplifying the control system by using a single switching mechanism rather than independent control systems for each tool.

Inventive Principle:
Principle #15Dynamics

3Stability of the object's composition

If the cutting tool is permanently fixed to the robot, then the structural stability is improved, but the ease of operation and mode switching deteriorates

Engineering Contradiction:
Improvestructural stabilityVSAvoidmode switching flexibility
Core Design Contradiction:
Stability of the object's compositionVSEase of operation

Solution Approach 1:

The system uses an operation mode switching device that enables dynamic switching between autonomous operation mode and cutting operation mode. The cutting tool is integrated into the robot structure with a stable mounting arrangement, while the switching device provides operational flexibility by allowing the user to select between different tool configurations based on task requirements, thereby maintaining both structural stability and operational ease.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS10973168B2Green area maintenance system and method for identifying at least a section of a boundary edge of an area to be treated
Publication Date: 2021.04.13 ANDREAS STIHL AG & CO KG
  • US10973168B2 patent drawing
  • US10973168B2 patent drawing

AI summary

A green area maintenance system includes an autonomous mobile green area maintenance robot having a treatment tool and a cutting tool differing from the treatment tool. The robot and the cutting tool are configured to allow fixing of the cutting tool to the robot. The system includes a user control device, and has an autonomous operation mode and a cutting operation mode. In the autonomous operation mode the autonomous mobile green area maintenance robot with its treatment tool operates autonomously and the cutting tool is set out of operation, and in the cutting operation mode the cutting tool is fixed to the green area maintenance robot and operable. The robot with its treatment tool and cutting tool are controlled by a user via the user control device, and an operation mode switching device for switching between the autonomous operation mode and the cutting operation mode.