Parcel Transport Arm Control for Priority-Based Extraction
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Solution Overview
Problem
Conventional transport devices with robot arms struggle to accurately extract parcels from containers due to issues like overlapping parcels and parcels that are difficult to suction, leading to inefficiencies and potential failure in parcel handling.
Innovation Solution
A transport device equipped with a position detection system, a holding mechanism with suction pads, and a control system that prioritizes parcel extraction based on predetermined conditions, excluding parcels likely to change position and handling non-suctionable items by error processing, while also allowing simultaneous lifting of adjacent parcels under specific conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional robot arms are used to extract parcels from containers, then the device structure is simple, but the parcel extraction accuracy deteriorates due to overlapping parcels and difficult-to-suction items
Solution Approach 1:
The system performs preliminary detection of parcel positions and priorities before extraction. The detection unit identifies parcel locations and the control unit determines extraction priorities in advance, allowing the robot arm to accurately target specific parcels without trial-and-error attempts, thereby improving extraction accuracy while maintaining relatively simple device structure.
Solution Approach 2:
The system incorporates a detection unit that provides real-time feedback on parcel positions and states. This feedback loop allows the control unit to adjust extraction priorities and robot arm movements dynamically, ensuring accurate extraction even when parcels are overlapping or in difficult-to-reach positions.
2Productivity
If multiple parcels are extracted simultaneously, then productivity increases, but the reliability of parcel handling deteriorates due to position changes and potential loss
Solution Approach 1:
The control unit determines extraction priorities for multiple parcels in advance based on detection results. By pre-calculating the optimal extraction sequence and targeting multiple stable parcels simultaneously, the system achieves high productivity while maintaining reliability through careful selection of parcels that are least likely to cause position changes.
Solution Approach 2:
The system applies different extraction strategies to different parcels based on their individual characteristics and positions. The control unit identifies and targets specific parcels with high stability scores for simultaneous extraction, while excluding parcels that are likely to move or cause instability, thus achieving both high productivity and reliability through localized optimization.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device achieves accurate and efficient parcel extraction by prioritizing stable parcels and handling exceptions, reducing operational time and the likelihood of parcel loss, thus enhancing overall handling efficiency.
Implementation Method 1
The holding portion holds the parcel by suctioning the parcel by means of a negative pressure
Data Source
AI summary
A transport device has a position detection portion, a holding portion attached to an arm, a driving portion to drive the holding portion and the arm, and a control portion. A control portion controls the position detection portion and the driving portion to perform, as one cycle, a procedure to detect a position of a parcel, select parcels based on a predetermined condition, and set priority for the selected parcels, and a procedure to refer to a result of the detection, and cause the holding portion to take out one or more parcels from the accumulation portion in accordance with the priority to transport the parcels to a predetermined location, and excludes, from parcels to be taken out, a second parcel that is present within a predetermined distance from a first parcel and has priority lower than the priority of the first parcel, during the one cycle.