Industrial Truck Navigation With Dynamic Temporary Landmarks
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Solution Overview
Problem
Autonomously driving industrial trucks face navigation challenges in dynamic environments like depots due to changing static conditions and the need for frequent updates of digital maps, leading to erroneous location determination and increased effort in maintaining accurate landmark data.
Innovation Solution
A method that involves creating and maintaining a map with both permanent and temporary landmarks, where temporary landmarks are entered when created and removed when no longer present, allowing for real-time updates and improved navigation accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If digital maps are frequently updated to reflect changing depot environments, then navigation accuracy is improved, but system complexity and maintenance effort increase
Solution Approach 1:
The patent segments landmarks into two distinct categories: permanent landmarks (buildings, fixed infrastructure) and temporary landmarks (containers, vehicles, movable objects). This segmentation allows the system to handle different types of landmarks with different update frequencies and methods, reducing overall system complexity while maintaining navigation accuracy.
Solution Approach 2:
The patent implements dynamic map updates by continuously monitoring and detecting temporary landmarks in real-time, while permanent landmarks remain static in the digital map. This dynamic approach allows the system to adapt to environmental changes without requiring complete map re-generation, balancing accuracy with system simplicity.
2Reliability
If temporary landmarks are continuously monitored and added to the map, then navigation reliability is improved, but data processing requirements and computational load increase
Solution Approach 1:
The patent establishes predetermined criteria and thresholds for temporary landmark detection and map integration before actual navigation operations begin. This preliminary setup includes defining what constitutes a temporary landmark, detection sensitivity parameters, and update triggers, which reduces computational load during real-time operations by pre-filtering and pre-processing requirements.
Solution Approach 2:
The patent creates simplified digital representations (copies) of temporary landmarks with essential attributes only (position, type, temporal validity) rather than comprehensive detailed models. This copying approach maintains navigation reliability by capturing necessary landmark information while significantly reducing data processing requirements and computational burden.
3Ease of manufacture
If the digital map includes only permanent landmarks, then map maintenance effort is reduced, but navigation accuracy in dynamic environments deteriorates
Solution Approach 1:
The patent divides the landmark database into permanent and temporary categories, allowing permanent landmarks to be maintained with minimal effort while temporary landmarks are automatically detected and added through sensor processing. This segmentation resolves the contradiction by applying different maintenance strategies to different landmark types.
Solution Approach 2:
The system implements self-service functionality where temporary landmarks automatically update the digital map through onboard sensors and detection algorithms without requiring manual intervention. The industrial truck itself contributes to map maintenance by detecting and reporting temporary landmarks during normal operations, reducing overall maintenance effort while improving accuracy.
Data Source
AI summary
The invention relates to a method for navigating an industrial truck in a predetermined area with the following method steps:providing a map of the predetermined area with at least one permanent landmark,entering a temporary landmark in the map, when the temporary landmark is created,deleting the temporary landmark from the map when the temporary landmark is removed, andnavigating the industrial truck in the predetermined area on the basis of the map having the permanent landmark and the temporary landmark.In this way, the navigating of a preferably autonomously or partly autonomously driving industrial truck in a predetermined area, such as at a depot, is improved and in particular is made safer and more reliable.