Conveyor Induct Subsystem Gap Control via Speed Adjustment
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Solution Overview
Problem
Conveyor systems face inefficiencies in creating optimal gaps between articles for effective sortation, as gaps that are too large can decrease throughput, and existing technologies struggle to balance sortation criteria with acceptable throughput.
Innovation Solution
A conveyor induct subsystem that uses article sensors and adjustable speed conveying surfaces to control the timing and speed of articles, ensuring they arrive at a release point with a desired gap, by determining estimated times of arrival and adjusting speeds accordingly, and maintaining speed ratios between conveyors to achieve the desired gap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gaps between articles are increased to facilitate sortation, then sortation effectiveness is improved, but throughput of the conveying system decreases
Solution Approach 1:
The induction subsystem creates the desired gaps between articles before they reach the sortation subsystem by controlling the speed of conveying surfaces upstream. This preliminary gapping action ensures that when articles arrive at the release point, they already have the appropriate spacing for effective sortation, eliminating the need to increase gaps at the sortation point itself which would reduce throughput.
Solution Approach 2:
The conveying system is divided into multiple sequentially arranged conveying surfaces (first conveying surface, second conveying surface, etc.) with independent speed control. Each conveying surface can be adjusted to create the desired gap progression, allowing the gap creation function to be segmented across multiple stages rather than requiring a single large gap adjustment that would reduce overall throughput.
2Manufacturing precision
If speed of conveying surfaces is adjusted to create optimal gaps, then gap precision is improved, but system complexity increases
Solution Approach 1:
The control system uses article sensors to detect the presence and position of articles on the conveying surfaces. Based on this feedback, the control calculates estimated times of arrival and adjusts the speed of conveying surfaces to ensure articles arrive at the release point with the desired gap. This closed-loop feedback mechanism achieves precise gap control while managing system complexity through automated decision-making.
Solution Approach 2:
The conveying surfaces are equipped with variable speed drives that allow dynamic adjustment of speed during operation. Rather than using fixed speeds or complex mechanical gap-adjustment mechanisms, the system dynamically changes the speed of conveying surfaces based on real-time article positions and desired gap requirements, simplifying the overall system architecture while maintaining precision.
Data Source
AI summary
An induction subsystem for a conveying system includes a plurality of induction conveying units that are controlled by a plurality of controls in a manner that delivers articles to a release conveyor with gaps between the articles that approach a desired length. The conveying units may be controlled using algorithms that examine a planned release time for an article and a time at which the article would be released were it to complete the rest of its travel through the induction subsystem at one or more nominal speeds. The difference is used to determine an appropriate speed for at least one of the conveying units. The conveying unit may alternatively be controlled using algorithms that determine desired speed ratios for the conveying units, and which may seek to control the centerline to centerline spacing of articles as they reach the release point such that desired gaps are created.