Work Machine Navigation via Map Data Perfection Analysis
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Solution Overview
Problem
Mining machines in mines face productivity issues due to areas where GPS positional data cannot be accurately acquired, leading to difficulties in maintaining set travel routes and efficient operation.
Innovation Solution
A work machine management system that includes a position detecting device, non-contact sensors, and map data accumulation to identify areas with low GPS data accuracy, generating travel routes that avoid these areas, ensuring the work machine travels along routes with high map data perfection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS is used to detect position of mining machine, then position detection is possible, but position data cannot be acquired in areas with poor GPS signal
Solution Approach 1:
The patent introduces map data as an intermediary between the GPS position detecting device and the travel route control system. When GPS positional data cannot be acquired or is inaccurate, the system uses pre-stored map data containing object information (banks, cliffs, roads, etc.) as a substitute reference to determine the mining machine's position and generate appropriate travel routes, thereby maintaining position detection reliability in GPS-denied environments.
Solution Approach 2:
The system performs preliminary actions by pre-acquiring and storing map data including object information and positional data in advance before the mining machine operates in areas with poor GPS signals. This pre-prepared data enables the machine to navigate reliably even when real-time GPS detection fails, resolving the contradiction between measurement precision and reliability.
2Area of stationary object
If mining machine travels in areas with low GPS accuracy, then coverage area increases, but travel route control becomes difficult
Solution Approach 1:
Map data serves as an intermediary reference system that enables the mining machine to operate in areas where GPS provides poor positional accuracy. By comparing detected object positions with pre-stored map data, the system can accurately determine location and generate appropriate travel routes even when GPS signals are weak or unavailable, thus expanding operational coverage without sacrificing control precision.
3Reliability
If travel route is generated avoiding areas with low map data perfection, then navigation reliability improves, but route flexibility decreases
Solution Approach 1:
The system performs preliminary action by pre-acquiring map data covering various areas including those with potential navigation challenges. This pre-prepared comprehensive map data enables the travel route generation unit to reliably select appropriate routes by comparing multiple options against the stored map information, ensuring navigation reliability while maintaining the flexibility to adapt to different operational requirements and terrain conditions.
Data Source
AI summary
A work machine management system includes: a position detector detecting a position of a work machine traveling on a travel route; a non-contact sensor detecting an object in a vicinity of the travel route in a non-contact manner; map data to accumulate information on existence and a position of the object in the travel route based on detection data obtained by the position detector and detection data obtained by the non-contact sensor; a travel route generator generating the travel route where the work machine travels; and an identifying unit to identify an area or a travel route having low perfection of map data of a travel route where the work machine travels. The travel route generator generates a travel route so as to cause the work machine not to pass the area or the travel route having the low perfection of the map data.