Loading Dock Control for Trailer Alignment and Clearance Checks

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Solution Overview

Problem

Current warehouse operations face inefficiencies and increased labor costs due to manual processes in aligning trailers at docking stations and preparing the area for loading and unloading, which can lead to human error and equipment damage.

Innovation Solution

A dock equipment control system that includes vehicle detection sensors, exterior positioning systems, trailer restraint systems, interior clearance sensors, and a control unit to automate the alignment and preparation processes, using sensors and communication lights to guide drivers and notify workers of alignment and clearance status.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If manual processes are used for aligning trailers and preparing loading dock areas, then labor flexibility is maintained, but labor costs increase and human error occurs

Engineering Contradiction:

Improveloading dock operation efficiencyVSAvoidautomation system complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The system divides the loading dock operation into distinct functional modules: vehicle detection subsystem, alignment guidance subsystem, interior clearance checking subsystem, and automated door/subsystem control. Each module performs a specific function and can be independently configured, making the overall system manageable despite its complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The control system is designed to work with multiple types of loading dock equipment (dock doors, dock levelers, wheel chocks, restraint systems) and can be applied to various loading dock configurations. The system performs multiple functions including detection, guidance, verification, and automated control within a single integrated platform.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Measurement precision

If manual alignment verification is performed by warehouse workers, then alignment can be confirmed, but time is lost and communication difficulties arise

Engineering Contradiction:

Improvetrailer alignment accuracyVSAvoiddocking preparation time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The system replaces manual visual inspection and communication methods with automated optical sensors and electronic communication. Exterior sensors detect trailer position and alignment, while interior sensors automatically verify clearance conditions, eliminating the need for workers to physically inspect and communicate alignment status.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system provides real-time feedback to the driver through communication lights displayed in the driver's mirror, indicating whether the trailer is properly aligned and whether the loading area is clear. This immediate feedback eliminates waiting time and communication delays associated with manual verification methods.

Inventive Principle:

Principle #23Feedback

3Reliability

If visual signals are used to communicate alignment status, then drivers can be notified, but miscommunication can occur and time is lost

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidalignment status information

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The system uses color-coded communication lights (red and green) displayed in the driver's mirror to convey alignment status and clearance information. Green indicates proper alignment and clear loading area, while red indicates misalignment or obstruction. This visual color-coding system provides unambiguous, immediate communication that eliminates misinterpretation.

Inventive Principle:

Principle #32Color changes

4Reliability

If manual checking of interior area is performed, then clearance can be verified, but labor costs increase and safety risks remain

Engineering Contradiction:

Improveclearance verification reliabilityVSAvoidsafety hazards to workers

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The system replaces manual interior area inspection with automated interior sensors that detect obstructions, debris, and safety conditions. The sensors automatically verify whether the loading area is clear and safe for operations, eliminating the need for workers to physically enter potentially hazardous areas.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The loading dock system performs self-verification of clearance conditions through automated sensors that continuously monitor the interior area. The system independently assesses safety conditions and communicates status to the driver, making the operation safer and more reliable without requiring manual intervention in hazardous zones.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12232693B2Systems and methods for automatically controlling loading dock equipment

Publication Date: 2025.02.25 ASSA ABLOY ENTRANCE SYST AB

AI summary

Systems and methods for automatically controlling loading dock equipment, such as in response to a trailer approaching and docking at a docking station, are disclosed. The systems and methods can provide scanning devices and scanning operations which assist with, for example, properly aligning a trailer at a docking station and/or checking an interior area in front of the dock door for obstructions. The systems and methods can also transmit messages between components of the system and/or to users of the system regarding the status of components of the systems and/or the status of the overall docking process.