Satellite-Guided Lawn Mower Path Calibration Without Boundary Wires
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Solution Overview
Problem
Existing smart lawn mowers face challenges with precision positioning, especially in large or irregular mowing areas, requiring physical wires or fences that are prone to damage and costly to maintain, and are affected by environmental factors like lightning and wind.
Innovation Solution
An intelligent mowing system utilizing satellite positioning signals received by a base station and mobile stations on the lawn mower, which includes a path calibration module to adjust the mower's trajectory and maintain a predetermined line width, using sensors like Gyro and accelerometer for accurate navigation and path correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If physical wires or electronic fences are used to define mowable area, then positioning can be achieved, but the system becomes complex and maintenance costs increase
Solution Approach 1:
The patent extracts the positioning function from physical wires and electronic fences, implementing it through satellite positioning receivers and processors that calculate position based on satellite signals. This removes the need for complex physical boundary systems while maintaining positioning capability.
Solution Approach 2:
The patent replaces mechanical positioning systems (physical wires, electronic fences) with an electromagnetic-based satellite positioning system. The mower uses satellite signals to determine its position without requiring any physical boundary infrastructure.
2Reliability
If physical wires are used for positioning, then mowable area can be defined, but they are prone to damage from environmental factors
Solution Approach 1:
The patent extracts the positioning function from vulnerable physical wires and implements it through satellite-based positioning. This removes the physical infrastructure that is susceptible to environmental damage while maintaining the boundary definition capability.
Solution Approach 2:
The patent introduces satellite positioning signals as an intermediary medium for boundary definition. Instead of direct physical contact with wires, the mower uses satellite signals to determine its position relative to the mowable area boundaries.
3Measurement precision
If boundary wires are kept straight and pinned with nails, then positioning accuracy is maintained, but installation and maintenance becomes troublesome
Solution Approach 1:
The patent replaces the mechanical wire-stretching and nailing system with an electronic satellite positioning system. The mower automatically calculates its position based on satellite signals without requiring any physical boundary installation or maintenance.
Solution Approach 2:
The patent enables the mower to autonomously determine its position and navigate using satellite signals. The system self-calculates position, speed, and acceleration without requiring external physical infrastructure installation or maintenance.
4Measurement precision
If electronic fences are exposed in air, then positioning can be achieved, but they are prone to damages from wind, rain and animals
Solution Approach 1:
The patent extracts the positioning function from vulnerable electronic fences and implements it through satellite positioning receivers. This removes the exposed physical infrastructure that is susceptible to environmental and animal damage while maintaining positioning precision.
Solution Approach 2:
The patent uses satellite positioning signals as an intermediary to define boundaries and track position. This eliminates the need for exposed electronic fences that are vulnerable to environmental factors while maintaining the ability to define and monitor the mowable area.
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
Enhances precision and efficiency of mowing operations, reduces repeat cuts and miss cuts, and eliminates the need for physical barriers, improving user experience and extending the mower's service life.
Implementation Method 1
a base station configured to receive at least one kind of satellite positioning signal sent by the satellite system; and a mobile station group mounted on the intelligent lawn mower and communicated with the base station, the mobile station group being used to receive at least one kind of satellite positioning signal sent by the satellite system
Data Source
AI summary
An intelligent mowing system includes a base station to receive at least one kind of satellite positioning signal sent by a satellite system at a fixed location and an intelligent lawn mower. A mobile station group is mounted on the intelligent lawn mower and communicated with the base station to receive at least one kind of satellite positioning signal sent by the satellite system during a walking process of the intelligent lawn mower. The mobile station group includes at least a first mobile station and a second mobile station arranged at intervals that determines the position of the intelligent lawn mower. A controller is configured to control the intelligent lawn mower to generally walk within a predetermined line width.