Adaptive Boundary Wire Transmitter With Feedback for Stable Signal Output
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Solution Overview
Problem
Existing robotic lawnmower systems require time-consuming calibration to adapt signal quality to varying lengths of boundary wires, limiting flexibility and efficiency in boundary wire installations.
Innovation Solution
An adaptive boundary wire transmitter using two bridge coupled power amplifiers, a sensing element, a feedback amplifier, a compensation network, and an error amplifier automatically adjusts output signals to match the properties of boundary and guide wires, eliminating the need for calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a calibration process is performed to adapt the applied alternating voltage to the properties of the border delimitation wire, then the signal quality is improved, but the installation time is increased
Solution Approach 1:
The transmitter automatically adapts its output signal to the boundary wire installation properties through self-service mechanisms. The system uses feedback from sensing elements to automatically adjust voltage and frequency without requiring external calibration, thereby maintaining high signal quality while eliminating time-consuming manual calibration procedures
Solution Approach 2:
The system implements feedback mechanisms where sensing elements detect the boundary signal current and provide information back to the transmitter. This feedback loop enables automatic adjustment of output parameters to optimize signal quality for the specific boundary wire installation, resolving the contradiction between maintaining high reliability and reducing installation time
2Measurement precision
If the applied alternating voltage is adapted to the properties of the border delimitation wire during installation, then the decision accuracy regarding lawnmower position is improved, but the system complexity is increased
Solution Approach 1:
The transmitter performs automatic adaptation of output signals to boundary wire properties through self-service mechanisms. By integrating sensing elements and automatic control logic within the transmitter itself, the system achieves high position detection accuracy without requiring complex external calibration equipment or procedures
Solution Approach 2:
The transmitter is designed as a multi-functional device that combines signal generation, sensing, automatic adaptation, and control functions in a single unit. This universal design achieves high measurement precision while minimizing system complexity by eliminating the need for separate calibration systems
3Ease of operation
If factory settings are used for fixed length border delimitation wires, then the ease of installation is improved, but the adaptability to different installation lengths is worsened
Solution Approach 1:
The transmitter employs dynamic adaptation mechanisms that automatically adjust output parameters based on the actual boundary wire installation properties. This dynamic behavior allows the system to maintain ease of installation while achieving high adaptability to different wire lengths and configurations, eliminating the need for fixed factory settings
Solution Approach 2:
The system automatically changes output parameters such as voltage and frequency based on detected boundary wire properties. This parameter adaptation enables the transmitter to work effectively with boundary wires of any length or configuration while maintaining simple installation procedures, resolving the contradiction between ease of operation and adaptability
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 adaptive transmitter ensures high-quality, recognizable signals for robotic lawnmowers across different boundary wire lengths without calibration, enhancing installation efficiency and stability.
Implementation Method 1
sensing the boundary signal current with a sensing element
Implementation Method 2
error amplifying the sensed boundary signal current and amplifying an output signal from the feedback amplifier with two bridge coupled power amplifiers
Implementation Method 3
Two signals with alternating voltage are applied simultaneously by a signal generator to the border delimitation wire
Data Source
Figure 1~2
Figure 3~4b
Figure 4c~4e
AI summary
An adaptive boundary wire transmitter (2) is disclosed comprising two bridge coupled power amplifiers (4, 6), a sensing element (8), a feedback amplifier (10), a compensation network (14) and an error amplifier (18). The adaptive boundary wire transmitter (2) is connected to a boundary wire installation, comprising a boundary wire (12) and feeds the boundary wire (12) with a boundary signal current. By using a feedback amplifier (10) to which the boundary signal current is fed together with the input signal together with compensation network (14) and an error amplifier (16) it is possible to generate a stable output signal from the adaptive boundary wire transmitter (2) to the boundary wire that is independent of the boundary wire length.