Linear Feeder Vibration Control for Combinatorial Weighing
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Solution Overview
Problem
In combinatorial weighing devices, variability in the quantity of articles in the retaining hopper leads to inconsistent article supply, causing intervals between transported articles to increase, potentially resulting in empty feeders and reduced combinatorial accuracy or impossible computations, affecting production yield.
Innovation Solution
A combinatorial weighing device with a linear feeder and an article detector that adjusts vibration strength based on the presence of articles at the downstream end, ensuring continuous supply by increasing vibration when articles are scarce and maintaining suitable discharge when present, preventing feeder emptiness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the retaining hopper capacity is increased to retain more articles for automatic operation, then the device can operate for longer hours without manual resupply, but the articles discharged become variable in quantity causing inconsistent supply intervals
Solution Approach 1:
The vibration strength of the linear feeder is made dynamically adjustable based on article detection. The controller changes the vibration strength depending on whether an article is detected at the downstream end, allowing the system to adapt its operation mode (transport vs. discharge) to maintain consistent supply intervals despite variable hopper contents
Solution Approach 2:
An article detector is positioned at the downstream end of the linear feeder to detect article presence. This detection feedback is used by the controller to adjust the vibration strength, creating a closed-loop control system that maintains reliable article supply intervals regardless of the total article quantity in the retaining hopper
2Speed
If the linear feeder operates with constant vibration strength to continuously transport articles, then articles are transported at close intervals when available, but the feeder becomes empty when articles are scarce in the retaining hopper
Solution Approach 1:
The vibration strength is dynamically adjusted based on article presence detection. When no article is detected at the downstream end, the vibration strength is increased to transport the next article more quickly, maintaining feeder continuity. When an article is present, the vibration strength is reduced to allow proper discharge, preventing feeder emptiness
Solution Approach 2:
The vibration strength parameter is changed based on the detection state. The controller switches between different vibration strength levels (first vibration strength for discharge, second vibration strength for transport) to maintain both transport speed and feeder continuity under varying article supply conditions
3Reliability
If the vibration strength is increased to prevent feeder emptiness when articles are scarce, then articles are transported more reliably, but articles already at the downstream end may not discharge properly
Solution Approach 1:
The article detector provides real-time feedback on article presence at the downstream end. This feedback enables the controller to distinguish between two states: when an article is present (requiring discharge mode with lower vibration) and when no article is present (requiring transport mode with higher vibration), thereby resolving the contradiction between supply reliability and discharge efficiency
Solution Approach 2:
The system dynamically switches between two vibration strength modes based on detection feedback. The first vibration strength facilitates article discharge when present, while the second vibration strength ensures reliable transport when articles are scarce, with the controller automatically selecting the appropriate mode
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 effectively maintains a consistent article supply, preventing feeder emptiness and ensuring accurate combinatorial computations, even with variable article quantities, thereby enhancing production yield.
Implementation Method 1
a linear feeder that vibrationally transports an article from an upstream side to a downstream side in a direction of transport
Implementation Method 2
the controller changes a vibration strength by which the linear feeder is driven to operate depending on whether the article detector is detecting the article at the downstream end of the trough
Data Source
AI summary
The vibration strength of a linear feeder is changeable depending on whether an article is currently present at a downstream end of a trough of the linear feeder. When articles continue to be vibrationally transported, arriving continuously at the downstream end of the trough of the linear feeder, the vibration strength is set to a vibration strength suitable for discharge of the articles from the downstream end. When there is currently no article at the downstream end of the trough of the linear feeder, the vibration strength is set to a vibration strength suitable for transport of the articles to allow the articles that follow to swiftly arrive at the downstream end of the trough.