Robot Lawn Mower RTK GNSS Positioning Near Obstacles
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Solution Overview
Problem
Existing lawn mower systems using GPS technology face significant precision issues due to signal degradation near obstacles or in areas with poor satellite reception, leading to reduced reliability and flexibility in grass cutting operations.
Innovation Solution
A system comprising a lawn mower robot equipped with a RTK GNSS receiving device and a remote server that processes GPS correction information from multiple GNSS antennas, optimizing data flow and ensuring accurate GPS positioning through differential GPS techniques, even in challenging conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If standard GPS technology is used for lawn mower localization, then the system is simple and low-cost, but GPS precision deteriorates near obstacles or in poor satellite reception areas
Solution Approach 1:
The patent introduces a remote server as an intermediary that receives GPS data from multiple fixed antennas and processes it using differential GPS techniques. This server acts as a mediator between the satellite signals and the lawn mower, providing corrected position data that improves precision without requiring complex onboard processing equipment in the mower itself.
Solution Approach 2:
The system divides the GPS positioning function into separate components: fixed GNSS antennas at known positions, a remote server for processing, and the mobile lawn mower. This segmentation allows each component to be optimized independently - the antennas provide reference points, the server handles complex calculations, and the mower simply receives corrected data.
2Extent of automation
If initial mapping of working area and obstacles is performed during installation, then the system can operate automatically, but the installation process becomes time-consuming and complex
Solution Approach 1:
The lawn mower robot performs self-localization using the differential GPS system. Instead of requiring manual mapping and obstacle registration during installation, the robot autonomously determines its position by receiving corrected GPS data from the remote server, which processes signals from multiple fixed antennas. The system adapts to the environment automatically without time-consuming initial setup.
3Reliability
If multiple GNSS antennas are deployed for differential GPS, then positioning reliability improves, but system complexity and infrastructure requirements increase
Solution Approach 1:
The remote server serves as an intermediary that manages the complexity of multiple GNSS antennas. Instead of requiring the user to directly configure and manage multiple antenna systems, the server automatically processes data from all antennas and provides simplified, reliable position corrections to the lawn mower, hiding the infrastructure complexity from the end user.
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 provides reliable and flexible grass cutting by ensuring precise GPS positioning, enabling effective operation in diverse conditions and managing obstacles, thus maintaining consistent grass height across large areas.
Implementation Method 1
a GNSS receiving 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
Data Source
AI summary
A is a lawn mower system, includes, in combination:—a database; —a remote server connected to the database,—at least one GNSS antenna equipped with a GNSS receiving device designed to receive from GNSS satellites first GPS information I1 for determining GPS coordinates of the position of the antenna and a communication device 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 to the remote server, the remote server being configured for storing in the database at least partly the GPS information received from the communication device;—a lawn mower robot.