Robot Lawn Mower GNSS Correction for Obstacle-Edge Navigation
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Solution Overview
Problem
Existing lawn mower robots using GPS technology face challenges with precision due to signal reduction near obstacles and poor satellite reception, requiring initial mapping and being less reliable in diverse conditions.
Innovation Solution
A lawn mower system that includes a database, a remote server connected to the database, and a lawn mower robot equipped with a GNSS antenna and RTK GPS technology, which uses differential GPS positioning to improve accuracy and reliability by transmitting GPS coordinates to a remote server for correction and optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If GPS technology is used for lawn mower robot navigation, then the robot can operate autonomously in diverse conditions, but the positioning precision is significantly reduced near obstacles and in zones with poor satellite reception
Solution Approach 1:
The patent introduces a remote server as an intermediary that receives GPS data from multiple antennas, processes it using differential GPS positioning techniques, and sends corrected position data back to the robot. This intermediary system enables high-precision positioning by mediating between the satellite signals and the robot's navigation needs, particularly improving accuracy near obstacles and in poor reception zones
Solution Approach 2:
The system implements feedback by continuously transmitting GPS coordinates from the robot to the remote server, which then sends back corrected position information. This closed-loop feedback mechanism allows real-time correction of positioning errors, maintaining high precision dynamically as the robot moves through different environmental conditions
2Reliability
If multiple GNSS antennas are deployed for improved positioning accuracy, then the system can operate reliably in poor GPS conditions, but the device complexity and data management burden increase
Solution Approach 1:
The patent merges the functionality of multiple GNSS antennas and their receiving devices into a unified remote server system. Instead of each antenna operating independently, their data is combined and processed centrally using differential GPS positioning, which improves reliability while managing complexity through consolidation rather than multiplication of processing units
Solution Approach 2:
The system uses multiple GNSS antennas as redundant copies to receive satellite signals. By having multiple copies of the receiving function at different locations, the system ensures that at least one antenna can provide reliable positioning data even when others are blocked by obstacles or operate in poor reception zones
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 system achieves a highly accurate and reliable grass cutting process, capable of operating effectively in various conditions, including near obstacles and areas with poor GPS signal quality, by utilizing differential GPS positioning and remote server optimization.
Implementation Method 1
a GNSS receiving device (21) designed to receive from satellites first GPS information I1 for determining GPS coordinates of the position of said antenna (20)
Implementation Method 2
a GPS device (4) of the RTK type, configured to receive from GNSS satellites second GPS information to determine GPS coordinates regarding a GPS position of the robot (1)... configured for calculating, on the basis of the GPS correction information and the GPS coordinates of the GPS position of the robot (1) received from the GNSS receiving device (4) of the RTK type, a correct GPS position of the robot (1), according to a differential GPS positioning technique
Data Source
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AI summary
Described is a lawn mower system (100), characterised in that it comprises, in combination: - a database (201); - a remote server (200) connected to said database (201), - at least one GNSS antenna (20A) equipped with a GNSS receiving device (21) designed to receive from GNSS satellites first GPS information I1 for determining GPS coordinates of the position of said antenna (20) and a communication device (22) configured to establish a data connection with a telecommunication network, preferably with the Internet, for transmitting, at predetermined intervals, the first GPS information I1 derived from the GNSS receiving device (21) to said remote server (200), the remote server (200) being configured for storing in the database (201) at least partly the GPS information received from the communication device (22); - a lawn mower robot (1).