Automated Unstacking of Staggered Racks via Vision-Guided Manipulation
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Solution Overview
Problem
Existing methods fail to efficiently and automatically unstack tangled racks arranged in staggered rows, leading to instability and difficulty in identifying the upper rack for gripping, especially in high-capacity production environments.
Innovation Solution
A device comprising a manipulator robot with a vision system and hooks on a pivotable support bar, combined with jaws, is used to detect and lift the upper rack from its entangled position, allowing precise unstacking and transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If racks are stacked in staggered rows in an entangled manner, then space in height is reduced and more racks can be stacked, but automatic unstacking becomes difficult and unstable
Solution Approach 1:
The vision system performs preliminary detection and identification of the upper rack position before the unstacking operation begins. The system analyzes images of the stacked racks to determine which rack is on top and plans the unstacking trajectory in advance, preventing instability during the extraction process.
2Quantity of substance
If racks are stacked in staggered rows in an entangled manner, then space in height is reduced and more racks can be stacked, but identifying the upper rack for gripping becomes difficult
Solution Approach 1:
The patent replaces manual visual inspection with an automated vision system consisting of cameras and image processing units. This system captures images of the stacked racks and algorithmically identifies the upper rack position, eliminating the difficulty of manual detection in entangled stacks.
3Ease of operation
If manual unstacking is used, then there is no particular problem of unstacking, but production capacity is limited
Solution Approach 1:
The system enables automatic self-unstacking through the coordinated action of the vision system, manipulator robot, and control unit. The system autonomously detects rack positions, plans extraction paths, executes the unstacking operation, and deposits racks without human intervention, thereby maintaining operational simplicity while dramatically increasing production capacity.
4Extent of automation
If automatic unstacking is used with regular stacking alignment, then unstacking is straightforward, but space in height is increased and fewer racks can be stacked
Solution Approach 1:
The manipulator robot employs dynamic, adaptable movement trajectories rather than fixed patterns. The system adjusts the extraction path in real-time based on the actual positions of racks detected by the vision system, allowing automatic unstacking to work effectively with staggered, entangled stacks while maintaining high automation levels.
Data Source
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AI summary
The device has a manipulating robot (2) that is enslaved with a vision system for detecting a rack (1) arranged at an upper part of a rack pile, and detects a griping zone of the rack for controlling the rack. The robot has a manipulating head (3) that is equipped with a hooking and lifting unit (4) for hooking and lifting the rack from the griping zone. The vision system has a camera (5) that scans a top part of the pile to search an upper rack, and another camera that scans a front side of the pile.