Robot Gardening Tool Boundary Feedback for Jam Extrication

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Solution Overview

Problem

Robot gardening tools often become jammed in non-ideal work areas, requiring human intervention to disengage, which prolongs work completion time.

Innovation Solution

A robot gardening tool system equipped with a boundary module, boundary detection, jamming detection, and control apparatus that autonomously detects jamming and performs extrication operations using feedback signals and trajectory recording to navigate out of jammed states.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the robot gardening tool works autonomously in non-ideal work areas, then productivity is improved, but the robot becomes jammed and requires human intervention

Engineering Contradiction:
Improvework completion speedVSAvoidoperation continuity
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The robot gardening tool automatically detects jamming conditions through the boundary detection apparatus and executes extrication operations without human intervention. The system monitors its own operational state and autonomously resolves jamming issues by reversing direction or adjusting its path, enabling self-service functionality that maintains productivity while ensuring operational continuity.

Inventive Principle:
Principle #25Self-service

2Reliability

If human intervention is used to disengage the robot from jammed state, then the robot can continue working, but work completion time is prolonged

Engineering Contradiction:
Improvejamming resolutionVSAvoidwork interruption time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The boundary detection apparatus continuously provides feedback signals to the control apparatus about the robot's position relative to boundary elements. When jamming is detected through abnormal feedback patterns (e.g., continuous boundary signals indicating the robot is stuck against a boundary), the system automatically initiates extrication operations, eliminating the need for human intervention and preventing work completion time delays.

Inventive Principle:
Principle #23Feedback

3Extent of automation

If the robot autonomously performs extrication operations, then human intervention is reduced, but the control system complexity increases

Engineering Contradiction:
Improveautonomous operation levelVSAvoidcontrol system structure
Core Design Contradiction:
Extent of automationVSDevice complexity

Solution Approach 1:

The boundary detection apparatus serves multiple functions: it detects boundary elements for navigation, monitors jamming conditions through feedback signal analysis, and provides positional information for extrication operations. By making this existing component multi-functional, the system achieves high autonomous operation levels without adding significant control system complexity, as the same hardware infrastructure supports multiple critical functions.

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

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

Enables the robot gardening tool to detect and extricate itself from jammed conditions effectively, reducing the need for human intervention and enhancing operational efficiency.

Implementation Method 1

the boundary element comprises a boundary line which generates a boundary signal upon receiving the excitation signal, the boundary signal for example being an electromagnetic field

Methodology Applied
Scientific EffectElectromagnetic field generation: Electromagnetic Induction

Data Source

PatentUS12604798B2Robot gardening tool system and method for robot gardening tool
Publication Date: 2026.04.21 TECHTRONIC CORDLESS GP
  • US12604798B2 patent drawing
  • US12604798B2 patent drawing
  • US12604798B2 patent drawing

AI summary

The present invention provides a robot gardening tool system and a method for a robot gardening tool. The robot gardening tool system comprises a robot gardening tool and a boundary module. The boundary module delimits a work area and/or a non-work area of the robot gardening tool, and the boundary module comprises at least one boundary element. The robot gardening tool comprises a boundary detection apparatus, a jamming detection apparatus and a control apparatus. The boundary detection apparatus detects the at least one boundary element; the jamming detection apparatus judges whether the robot gardening tool is jammed based on a feedback signal Si of the boundary detection apparatus; and the control apparatus controls the robot gardening tool to perform an extrication operation when the robot gardening tool is jammed. The present invention also provides a method for a robot gardening tool. The robot gardening tool system and method for a robot gardening tool according to the present invention enable effective detection of jamming, reduce misjudgements, and can perform effective operations on work areas where jamming is likely.