AR Screw-Tightening Guidance for Hidden Fastening Locations
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Solution Overview
Problem
In screw-tightening tasks, especially when fastening locations are difficult to see or hidden, workers face challenges in accurately positioning tools and applying the correct torque, leading to errors such as missed screws or improper tightening sequences.
Innovation Solution
A processing device and head-mounted display system that displays virtual objects indicating fastening locations at positions separate from the actual locations, allowing workers to easily identify where to position their hands and tools, and provides guidance through augmented reality, associating data from tools with the virtual objects to ensure accurate screw tightening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If virtual objects are displayed at the actual fastening locations, then workers can see the screw positions, but the virtual objects may be obscured or difficult to see when fastening locations are hidden
Solution Approach 1:
The patent displays virtual objects in a separated position rather than directly at the fastening location, effectively moving the information display to a different spatial dimension where it remains visible and not obscured by the workpiece or fastening area
Solution Approach 2:
The system introduces an intermediary virtual indicator object that mediates between the worker and the actual fastening location, providing visual guidance without requiring the indicator to be placed directly at the obscured location
2Ease of operation
If virtual objects are displayed at separated positions, then virtual objects remain visible and guide workers effectively, but workers may have difficulty accurately positioning tools at the actual fastening locations
Solution Approach 1:
The virtual indicator object serves as an intermediary that provides clear visual guidance while the system maintains the ability to detect actual tool positioning through sensor data, bridging the gap between visual guidance and precise positioning
Solution Approach 2:
The system incorporates feedback mechanisms that detect the actual position of tools and provide real-time information to determine when the tool has reached the correct fastening location, ensuring positioning accuracy despite the separated display position
3Loss of information
If the system displays detailed information at fastening locations, then workers receive comprehensive guidance, but the system complexity increases
Solution Approach 1:
The patent extracts the information display function from the fastening location itself and places it in a separated position, simplifying the overall system by decoupling the display location from the operational location
Solution Approach 2:
The system uses virtual indicator objects that are visual representations or copies of the fastening location information, displayed at separated positions, providing comprehensive guidance without requiring complex physical modifications at the fastening locations
Data Source
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AI summary
According to one embodiment, a processing device (10) causes a display of a first object at a position separated from a fastening location of a screw. The first object is virtual and indicates the fastening location. The processing device associates first data and second data when a prescribed physical object contacts the first object and the first data is received from a tool turning the screw. The second data is related to the fastening location.