Mine Work Machine Map Data Sharing for GPS Error Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In a work machine that autonomously travels in a mine, ionospheric abnormalities can deteriorate GPS position accuracy, leading to potential operational stoppages and reduced productivity.
Innovation Solution
A management system that enables work machines to create and share map information about their regions, allowing the management device to transmit relevant map data to each machine, ensuring accurate navigation even when GPS errors occur, by using distance measuring sensors and determining units to request and update map information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If GPS position detection is used for autonomous navigation, then navigation capability is provided, but position accuracy deteriorates when ionospheric abnormalities occur
Solution Approach 1:
The patent introduces map information as an intermediary between the work machine and the navigation system. Instead of relying solely on GPS signals that are vulnerable to ionospheric abnormalities, the system uses pre-stored map information of the mine region as a reference framework. The work machine determines its position by matching sensor data with map information, thereby mediating the navigation process and eliminating direct dependence on vulnerable GPS signals.
Solution Approach 2:
The patent segments the navigation system into multiple independent components: GPS reception unit, map information storage unit, sensor detection units (laser radar, imaging radar), and position determination unit. This segmentation allows the system to switch between different navigation methods (GPS-based or map-based) depending on signal conditions, improving overall reliability when ionospheric abnormalities occur.
2Reliability
If map information pieces from multiple regions are transmitted to each work machine, then navigation accuracy in adjacent regions is improved, but communication data load increases
Solution Approach 1:
The patent applies local quality by transmitting map information selectively based on the work machine's current position and movement direction. Each work machine receives map information pieces specifically for its current region and adjacent regions in its travel path, rather than receiving all map information for the entire mine. This localized approach ensures navigation reliability in relevant areas while minimizing unnecessary data transmission.
Solution Approach 2:
The patent implements partial action by transmitting only the necessary portion of map information (current region + adjacent regions) rather than complete map data. This partial transmission provides sufficient information for autonomous navigation in the foreseeable travel path without the excessive data load of transmitting entire mine maps, achieving an optimal balance between navigation reliability and communication efficiency.
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
This system suppresses productivity deterioration in mines by ensuring continuous operation of work machines through accurate navigation and map data sharing, even in conditions where GPS accuracy is compromised.
Implementation Method 1
a distance measuring sensor that detects a position of a surrounding object
Implementation Method 2
accuracy of a position detected by using a global navigation satellite system may be deteriorated
Data Source
AI summary
A management system 1 for a work machine includes: a plurality of dump trucks 2 each creating a map information piece DTI of a sectioned region DT around the own vehicle; and a management device 10 that manages map information pieces DTI of a plurality of sectioned regions DT created by the plurality of dump trucks 2 and transmits, to each of the dump trucks 2, a map information piece DTI of a sectioned region DT where each of the dump trucks 2 exists and a map information piece DTI of a sectioned region DT adjacent to the sectioned region DT where each of the dump trucks 2 exists on the basis of information related to a position of each of the dump trucks 2.