Accumulation Conveyor Control for High-Density Throughput

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Solution Overview

Problem

Conventional accumulation conveyors face challenges in maintaining high product density and throughput while accurately differentiating between product accumulation and flow, leading to inefficiencies and potential product damage due to complex and non-intuitive control systems.

Innovation Solution

The implementation of a control system with sensors and controllers that determine zone operating states based on multiple conditions, including item detection and operational characteristics, to optimize accumulation logic and adjust release rates and aggressiveness, allowing for intuitive setup and fine-tuning of accumulation conveyor systems.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If conventional accumulation conveyor control systems are used to maintain high product density, then product accumulation is achieved, but throughput and operating speed are reduced due to inability to accurately differentiate between accumulation and flow states

Engineering Contradiction:

Improveproduct densityVSAvoidthroughput

Core Design Contradiction:

Quantity of substanceVSProductivity

Solution Approach 1:

The control system continuously monitors zone occupancy sensors and downstream zone states to dynamically adjust each zone's operating state. This feedback mechanism allows the system to accurately differentiate between accumulation conditions (where zones should be inactive) and flow conditions (where zones should remain active), enabling high product density without sacrificing throughput.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system dynamically adjusts zone operating states based on real-time sensor data and changing downstream conditions. Rather than using fixed control logic, the system adapts its behavior to current operational requirements, allowing seamless transition between accumulation and high-speed flow modes to maintain both density and throughput.

Inventive Principle:

Principle #15Dynamics

2Reliability

If complex control logic is used to manage accumulation zones, then accumulation functionality is improved, but system complexity and difficulty of operation increase

Engineering Contradiction:

Improveaccumulation functionalityVSAvoidsetup and adjustment simplicity

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The control system automatically determines zone operating states based on sensor input and pre-programmed logic, eliminating the need for manual configuration and complex setup. The system self-adjusts to changing conditions without requiring operator intervention, simplifying operation while maintaining reliable accumulation functionality.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces complex mechanical control systems with electronic sensors and programmable logic. This substitution simplifies the physical setup and adjustment processes while maintaining or improving accumulation reliability through more precise and flexible control mechanisms.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Quantity of substance

If conventional accumulation logic is used to stop and accumulate product, then product grouping is achieved, but product damage risk increases due to harsh stopping mechanisms

Engineering Contradiction:

Improveproduct groupingVSAvoidproduct damage

Core Design Contradiction:

Quantity of substanceVSObject-affected harmful factors

Solution Approach 1:

The control system prepares for product stopping by progressively activating downstream zones and adjusting upstream zone states before product arrival. This anticipatory control softens the stopping action by creating a gradual deceleration profile rather than abrupt stops, reducing product damage while maintaining effective grouping.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The system uses periodic activation of zones in a coordinated sequence to create gentle, rhythmic product flow and stopping patterns. This periodic action replaces harsh, continuous stopping mechanisms with a series of controlled, intermittent zone activations that reduce impact forces on products.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS11807469B2High-rate at high-density tunable accumulation conveyor

Publication Date: 2023.11.07 INTELLIGRATED HEADQUARTERS LLC

AI summary

Various embodiments disclosed herein provide for an improved accumulation conveyor and systems and methods for controlling a high rate, high density tunable accumulation conveyor. In one embodiment, an accumulation conveyor system determines whether an item detection variable associated with a second zone of a plurality of zones is satisfied, wherein the second zone is downstream of a first zone. The accumulation conveyor system determines whether at least one of two operational characteristic variables is satisfied. In an instance where both the item detection variable and at least one operational characteristic variable are satisfied, the accumulation conveyor system is configured to set a zone operating state associated with the first zone to inactive and send a command signal comprising the zone operating state associated with the first zone to a control module associated with the first zone. In another embodiment, an improved method for adjusting aggressiveness is disclosed. In another embodiment, a tunable release rate accumulation conveyor is disclosed. In still another embodiment, a tunable crowding accumulation conveyor is disclosed.