Robotic Work Tool Beacon-Based Obstacle Detection to Reduce Wear
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Solution Overview
Problem
Existing robotic work tools face challenges in efficiently detecting and navigating around temporary and dynamic obstacles, as current methods are cumbersome, prone to increased wear and tear, and unsuitable for virtual obstacles, especially in residential areas.
Innovation Solution
A robotic work tool system equipped with a beacon marker and sensor that uses radio frequency or ultrasonic signals to mark obstacles, allowing the tool to adapt its operation based on proximity, reducing the need for physical markers and minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If collision detection is used to detect obstacles, then the robotic tool can detect physical obstacles, but the wear and tear of the robotic tool increases
Solution Approach 1:
The patent replaces mechanical collision detection with electromagnetic sensing. The robotic tool uses sensors (e.g., capacitive, inductive, or optical sensors) to detect obstacles at a distance, substituting the mechanical impact-based detection method with a non-contact electromagnetic field-based detection system, thereby eliminating wear and tear from repeated collisions.
Solution Approach 2:
The patent introduces an intermediary sensing mechanism between the robotic tool and the obstacle. Instead of direct mechanical contact, the tool uses electromagnetic fields or other intermediary detection methods to sense the presence of obstacles, allowing detection without physical contact and thus preventing wear and damage.
2Reliability
If boundary wires are dug down to mark obstacles, then permanent structures can be marked, but the installation becomes cumbersome for temporary obstacles
Solution Approach 1:
The patent transitions from static, permanent boundary wires to dynamic, flexible markers. The system allows obstacle markers to be temporarily placed and easily repositioned based on changing conditions, enabling the same marking system to adapt to both permanent and temporary obstacles without requiring digging or permanent installation.
Solution Approach 2:
The patent changes the physical state or form of the boundary markers from fixed underground wires to removable surface markers or electronic markers. This parameter change allows the markers to be easily installed and removed, accommodating temporary obstacles while maintaining detection accuracy through alternative marker technologies.
3Speed
If high power signals are used for beacon markers, then obstacle detection range is improved, but interference in residential areas increases
Solution Approach 1:
The patent employs periodic or pulsed signal transmission instead of continuous high-power signals. The beacon markers transmit signals in periodic bursts or pulses, allowing the robotic tool to detect obstacles at extended ranges during transmission peaks while minimizing average power output and reducing continuous interference in residential areas.
Solution Approach 2:
The patent uses partial action by transmitting signals only when necessary for detection rather than continuously at full power. The system modulates signal strength and transmission timing to provide sufficient detection range only when needed, reducing overall interference while maintaining effective obstacle detection capability.
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
This solution enables easy and efficient detection of obstacles, reduces wear and tear on the robotic tool, and effectively handles temporary and virtual obstacles without the need for complex setup or high power usage, improving navigation and operation in various environments.
Implementation Method 1
A robotic work tool system equipped with a beacon marker and sensor that uses radio frequency or ultrasonic signals to mark obstacles
Implementation Method 2
A robotic work tool system equipped with a beacon marker and sensor that uses radio frequency or ultrasonic signals to mark obstacles
Data Source
AI summary
A robotic work tool system (200) comprising a robotic work tool (100) and a beacon marker (280), said robotic work tool (100) comprising a beacon sensor (175) configured to sense a signal being transmitted by the beacon marker (280), said beacon marker (280) marking an area (270) around an obstacle (260) in a work area (205) in which said robotic work tool (100) is arranged to operate, wherein said robotic work tool is configured to determine a proximity to a beacon marker (280) and to adapt its operation accordingly.