Work Machine Control System Using Integrated Map Data for Positioning
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Solution Overview
Problem
The vast mining site requires a large storage capacity to manage enormous map data, and the dynamic nature of the site necessitates a technique for generating appropriate map data that keeps pace with changes in the landform.
Innovation Solution
A control system for work machines that includes a position detecting device, non-contact sensors, a map data generating unit, and integrated map data calculation, which integrates past and current map data to calculate the work machine's position and generate accurate map data corresponding to the current landform, thereby reducing data storage needs and ensuring up-to-date information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If map data is continuously acquired and stored to reflect current landform changes, then map data accuracy is improved, but data storage requirements increase massively
Solution Approach 1:
The system extracts only the essential elements needed for position calculation from the complete map data. Instead of storing and processing all detected objects and environmental features, the system identifies and retains only those map elements (landmarks, features) that are necessary for matching sensor data and determining machine position, thereby reducing storage requirements while maintaining positioning accuracy
Solution Approach 2:
Instead of storing all map data and searching through it to find position information, the system inverts the approach by using the position detecting device to first determine current position, then selectively acquiring and storing only the map data relevant to that specific location and time period, thus avoiding massive data storage while ensuring current landform accuracy
2Adaptability or versatility
If map data is updated frequently to reflect daily changes in mining site, then landform change tracking is improved, but data management complexity increases
Solution Approach 1:
The system implements periodic data acquisition and updating at predetermined time intervals rather than continuous updates. The position detecting device and map data generating unit operate at scheduled periods, acquiring position information and generating map data updates only when needed, which reduces data management complexity while still capturing landform changes that occur between mining operations
Solution Approach 2:
The system performs preliminary position detection and map data generation at predetermined intervals before actual mining operations fully commence in new areas. By proactively establishing baseline map data and position references in advance, the system simplifies subsequent data management and enables faster adaptation to landform changes without requiring complex real-time processing
Data Source
AI summary
A control system includes: a detector detecting a position of a work machine running on a running path; a non-contact sensor detecting an object at a side of the running path; a generator generating map data of a work site based on detection data from the detector and the non-contact sensor; a first storage storing past map data generated in the generator based on the detection data from the detector and the non-contact sensor acquired in a predetermined period in a past; a second storage storing current map data generated in the generator based on the detection data from the detector and the non-contact sensor; a first calculator calculating integrated map data by integrating the past map data and the current map data; and a second calculator by matching the integrated map data and the detection data from the non-contact sensor, calculates the position of the work machine.