Transport Vehicle Control Load Restriction to Prevent Delivery Delays

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Solution Overview

Problem

Existing control systems for transport vehicles experience delays in article transport due to increased processing load on the control device, leading to prolonged delays in transporting articles when the processing load exceeds a certain threshold.

Innovation Solution

Implement a restriction mode in the control system that restricts the execution of certain processing tasks when the processing load on the control device exceeds a predetermined threshold, excluding assignment processing to ensure continuous article transport.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the control device executes all types of processing to manage transport vehicles, then the system can maintain full functionality and flexibility, but the processing load on the control device increases causing delays in article transport

Engineering Contradiction:

Improvecontrol device functionalityVSAvoidtransport delay

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The control device dynamically adjusts its processing capabilities by switching between normal mode and restriction mode based on real-time processing load conditions. When the processing load exceeds a predetermined threshold, the system automatically enters restriction mode to reduce processing tasks and eliminate transport delays, then returns to normal mode when load decreases.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the operational parameters of the control device by modifying which processing types are executable. In restriction mode, the control device restricts execution of certain processing types (such as optimization and coordination tasks) while maintaining essential processing capabilities, thereby adjusting the system's functional parameters to match load conditions.

Inventive Principle:

Principle #35Parameter changes

2Loss of time

If the control device reduces processing load by restricting execution of certain tasks, then transport delays are reduced, but the system's processing capability and flexibility decrease

Engineering Contradiction:

Improvetransport delayVSAvoidprocessing capability

Core Design Contradiction:

Loss of timeVSProductivity

Solution Approach 1:

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

In restriction mode, the control device selectively executes only essential processing tasks while restricting non-essential tasks. This partial execution approach ensures that minimum processing capability is maintained for critical functions like assignment processing, while optional or optimization tasks are suspended to reduce overall processing load and prevent delays.

Inventive Principle:

Principle #16Partial or excessive action

3Productivity

If the control device continuously processes all tasks, then article transport can be optimized, but the processing load accumulates causing persistent delays

Engineering Contradiction:

Improvetransport efficiencyVSAvoidprocessing delay

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The control device continuously monitors its own processing load and uses this feedback to automatically switch between normal mode and restriction mode. When processing load exceeds a predetermined threshold, the system detects this condition and activates restriction mode to prevent delay accumulation, then transitions back to normal mode when load decreases, creating a self-regulating feedback control mechanism.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The control device periodically evaluates processing load conditions and switches between operational modes accordingly. This periodic monitoring and mode switching allows the system to maintain transport efficiency during low-load periods while preventing delay accumulation during high-load periods through periodic activation of restriction mode.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS12606384B2Article transport vehicle control system

Publication Date: 2026.04.21 DAIFUKU CO LTD

AI summary

A control includes a control device configured to execute a plurality of types of processing including assignment processing of assigning one or more movement tasks for transporting the article, to one of the plurality of transport vehicles. In response to a processing load on the control device exceeding a predetermined reference load, the control system reduces the processing load on the control device by enabling a restriction mode in which the control device is restricted from executing target processing including one or more of the types of processing executed by the control device other than the assignment processing.