Boundary Wire Break Detection for Self-Propelled Mowers
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Solution Overview
Problem
Self-propelled gardening devices face difficulties in quickly locating boundary wire breaks, which affects their operation and efficiency.
Innovation Solution
A self-propelled device system with a boundary wire and signal transmitting unit that generates a magnetic field, a signal receiving module to detect changes in the magnetic field, and a control module to determine wire breaks by analyzing the amplitude of the boundary wire inductive signal, allowing the device to enter a wire break detection mode and locate the break position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the self-propelled device operates within a boundary wire system, then the device can perform automated mowing tasks, but the device cannot quickly locate wire break positions when boundary wire breaks occur
Solution Approach 1:
The system continuously monitors the boundary wire signal by detecting magnetic field changes. When a wire break occurs, the feedback mechanism immediately identifies the signal anomaly and locates the break position, providing real-time information about the boundary wire status without manual intervention.
Solution Approach 2:
The patent replaces manual wire break detection methods with an electromagnetic detection system. The signal receiving module uses magnetic field sensing to automatically detect and locate wire breaks, substituting mechanical inspection with electromagnetic field-based detection for faster and more accurate results.
2Difficulty of detecting and measuring
If manual detection methods are used for boundary wire breaks, then the system structure remains simple, but the detection speed and efficiency are low
Solution Approach 1:
The patent replaces manual visual inspection and physical tracing of boundary wires with an automated electromagnetic detection system. The signal receiving module detects magnetic field changes caused by boundary wire signals, enabling automatic identification and localization of wire breaks without manual intervention.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary carrier for boundary wire signal transmission. Instead of directly detecting electrical signals in the wire, the system uses magnetic field changes as an intermediate step, allowing non-contact detection and improving detection efficiency while maintaining system simplicity.
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 rapid detection and localization of boundary wire breaks, improving operational efficiency and reducing manual intervention.
Implementation Method 1
a signal transmitting unit electrically connected with the boundary wire, and configured to generate and send a boundary signal to the boundary wire, the boundary signal being enabled to generate a magnetic field when flowing through the boundary wire
Implementation Method 2
a signal receiving module for inducing a magnetic field change caused by the boundary signal to generate a boundary wire inductive signal
Data Source
AI summary
A self-propelled device system includes a self-propelled device, a boundary wire configured to define a work area of the self-propelled device and a signal transmitting unit electrically connected with the boundary wire configured to generate and send a boundary signal to the boundary wire that generates a magnetic field when flowing through the boundary wire. The self-propelled device has a signal receiving module and a control module. The signal receiving module uses the magnetic field caused by the boundary signal to generate a boundary wire inductive signal and the control module determines that the boundary wire has a wire break when a relevant parameter of the boundary wire inductive signal is less than or equal to a predefined threshold.