Digital Cargo Door Security System with Magnetic Switch

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing digital cargo security systems are not compatible with vehicles having side-mounted swing-out type cargo access doors, as they require different lock mechanisms than those used on roll-up type doors, limiting their applicability and reliability in ensuring cargo integrity during transit.

Innovation Solution

A digital security system for side-mounted swing-out type cargo access doors, featuring a digital counter and a lock assembly with a magnetically actuated switch, which generates an actuation signal when the handle receiving member moves from its locked position, causing the displayed number to change, indicating potential unauthorized access.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a physical seal is used on the exterior of the cargo door, then it provides a visual indicator of door access, but it is exposed to environmental elements causing false damage indications

Engineering Contradiction:

Improveseal indication reliabilityVSAvoidenvironmental exposure damage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the seal mechanism from the exterior environment by mounting the digital counter inside the cargo compartment and the magnetically actuated switch inside the lock assembly. This removes the sensing components from environmental exposure while maintaining their functional connection to the door locking mechanism, thereby eliminating false damage indications from weather exposure.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces a magnetic field as an intermediary between the handle receiving member and the magnetically actuated switch. The magnet is attached to the handle receiving member and actuates the switch through magnetic coupling without physical contact, allowing the switch to remain protected inside the lock assembly while still detecting handle position changes.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If a digital counter system is designed for roll-up type doors, then it provides accurate access monitoring, but it cannot be adapted to side-mounted swing-out type doors with different lock mechanisms

Engineering Contradiction:

Improveaccess detection accuracyVSAvoiddoor type compatibility

Core Design Contradiction:

Measurement precisionVSAdaptability or versatility

Solution Approach 1:

The patent achieves universality by designing a lock assembly configuration where the handle receiving member and magnetically actuated switch can be integrated with side-mounted swing-out type door locks. The magnetic actuation mechanism provides a universal interface that works with different lock types, allowing the same digital counter system design to be adapted to various door configurations including swing-out types.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If the magnetically actuated switch is positioned inside the lock housing, then it is protected from environmental damage, but it requires precise magnetic coupling with the moving member

Engineering Contradiction:

Improveswitch protection from elementsVSAvoidmagnetic coupling alignment

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The patent uses a permanent magnet attached to the handle receiving member that provides a reliable magnetic field for actuating the switch. The magnetic coupling is designed to be tolerant of reasonable manufacturing variations, using the magnetic field's natural properties to provide a reliable actuation zone that accommodates normal manufacturing tolerances without requiring extremely precise alignment.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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

Provides a reliable and accurate indication of cargo access during transit, eliminating the need for physical seals and reducing false positives from environmental damage, ensuring cargo integrity by comparing the initial and final displayed numbers.

Implementation Method 1

A magnetically actuated switch is mounted within the housing. The switch is connected to the digital counter and is adapted to generate an actuation signal to the digital counter in response to movement of the member within the housing from its locked position.

Methodology Applied

Scientific EffectMagnetic field sensing: Magnetic Field

Data Source

PatentUS10181233B1Digital seal security system for side mounted swing-out type vehicle cargo access doors

Publication Date: 2019.01.15 HABER GREG

AI summary

The system includes a digital counter adapted to display a number which is changed in response to an actuation signal. A lock assembly mounted to the cargo door is connected to the counter. The lock assembly has a hollow housing within which a member having a recess adapted to receive the handle is moveable by the handle between an unlocked position, wherein the door may be opened, and a locked position, in which the door is prevented from being opened. A magnetically actuated switch is mounted within the housing. The switch is adapted to generate an actuation signal to the digital counter in response to movement of the member within the housing from its locked position. The signal causes the counter to change the displayed number, indicating that the door may have been opened in transit.