Fleet Position Correction for Autonomous Working Machines
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Solution Overview
Problem
Autonomous working machines face reduced traveling accuracy due to poor satellite signal reception, especially when near buildings, leading to inaccuracies in position information calculation.
Innovation Solution
A management device that acquires position information from multiple autonomous working machines, corrects the position information of machines with low accuracy using a high-accuracy machine equipped with an external sensor, and notifies the corrected information to the low-accuracy machine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If autonomous working machines rely on satellite signals for position information, then they can operate autonomously, but their position accuracy deteriorates when near buildings with poor satellite signal reception
Solution Approach 1:
The management device acts as an intermediary between autonomous working machines with good satellite reception and those with poor reception. It collects position information from multiple machines, identifies those with high accuracy, and uses their data to correct the position information of machines suffering from poor satellite signal reception near buildings.
Solution Approach 2:
The system creates a virtual copy of accurate position information from machines with good satellite reception and applies it to machines with poor reception. Instead of each machine relying solely on its own satellite signals, the management device replicates accurate position data across the fleet, allowing machines in shadowed areas to operate autonomously with corrected position information.
2Device complexity
If autonomous working machines operate independently with their own satellite reception, then system complexity is reduced, but position accuracy deteriorates in areas with poor satellite signals
Solution Approach 1:
The patent merges the position information processing capabilities of multiple autonomous working machines through a centralized management device. Instead of each machine operating completely independently, their position data is combined and evaluated collectively, allowing the system to identify and utilize high-accuracy position information from any machine to correct others, thereby improving overall position accuracy without significantly increasing individual machine complexity.
3Measurement precision
If position information is corrected using data from multiple machines, then position accuracy is improved, but information processing time and communication overhead increase
Solution Approach 1:
The management device continuously collects and evaluates position information from multiple autonomous working machines in advance, maintaining a repository of accurate position data. When a machine experiences poor satellite reception, the correction can be applied immediately from pre-collected data, reducing the real-time processing time required while still achieving accurate position correction.
Data Source
AI summary
A management device includes an acquisition unit, a correction unit, and a notification unit. The acquisition unit acquires, from each of at least two of autonomous working machines, position information calculated by the autonomous working machine based on satellite signals. Based on the position information of a first autonomous working machine having relatively high positional accuracy, the correction unit corrects the position information of a second autonomous working machine having relatively low positional accuracy. The notification unit notifies the second autonomous working machine of the position information that has been corrected.