Vehicle Door Locking Control for Child Safety and Obstacle-Aware Exit

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Solution Overview

Problem

Existing vehicle locking systems lack the ability to adapt easily to different use scenarios, such as when adults or children are using the back seats, leading to inappropriate activation or deactivation states that affect comfort and safety.

Innovation Solution

A method that automatically adjusts the locking system based on obstacle detection in the vehicle's surroundings, seat occupancy, and occupant type, using sensors to determine if an obstacle is within the door's range and if the seat is occupied by a child, thereby activating or deactivating the locking system accordingly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the locking system is activated to block door opening from interior, then child safety is improved, but adult passengers cannot exit the vehicle easily

Engineering Contradiction:
Improvechild safetyVSAvoidadult passenger exit
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The locking system dynamically adjusts its state between activated and deactivated based on real-time sensor inputs (obstacle detection, seat occupancy, occupant type detection). The system transitions from a static locking mechanism to a dynamic one that adapts to different usage scenarios, allowing adult passengers to exit easily when appropriate while maintaining child safety when needed.

Inventive Principle:
Principle #15Dynamics

2Ease of operation

If the locking system is deactivated to allow easy door opening, then passenger comfort is improved, but children may accidentally open the door causing safety hazards

Engineering Contradiction:
Improvepassenger comfortVSAvoidchild safety
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The system continuously monitors multiple parameters including seat occupancy status, obstacle presence in door range, and occupant type (adult/child) through sensors. Based on this feedback, the locking system automatically adjusts its state to balance comfort and safety requirements.

Inventive Principle:
Principle #23Feedback

3Device complexity

If the locking system uses simple button activation, then device complexity is reduced, but adaptability to different use scenarios is limited

Engineering Contradiction:
Improvelocking system structureVSAvoiduse scenario adaptation
Core Design Contradiction:
Device complexityVSAdaptability or versatility

Solution Approach 1:

The locking system performs automatic self-assessment by detecting obstacles, monitoring seat occupancy, and identifying occupant types. Based on this self-detection, the system autonomously determines the appropriate locking state without requiring manual intervention from the driver, thereby achieving high adaptability while maintaining simple operation.

Inventive Principle:
Principle #25Self-service

4Reliability

If the locking system is always activated, then child safety is ensured, but driver mental load increases due to constant monitoring requirements

Engineering Contradiction:
Improvechild safetyVSAvoiddriver mental load
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The system automatically monitors and assesses the locking requirements by detecting obstacles, seat occupancy, and occupant types. This self-service capability relieves the driver of constant monitoring responsibilities while ensuring child safety through automated decision-making.

Inventive Principle:
Principle #25Self-service

Data Source

PatentEP4477824B1Method for operating a locking system, data processing apparatus, computer program, computer-readable storage medium, and locking system for a vehicle
Publication Date: 2026.01.21 VOLVO CAR CORP
  • EP4477824B1 patent drawingFigure 1~2

AI summary

Claim 1 relates to a method for operating a locking system (52) for a vehicle (10) which is configured to allow opening of an associated door (28) from an interior of the vehicle (10) in a de-activated state and to block opening of the associated door (28) in an activated state. The method comprises obtaining an obstacle information indicating whether an obstacle (36) is present in the surroundings of the vehicle (10) and determining whether the obstacle (36) is at least in part located within a door range (R). Then, the locking system (52) is transferred in the de-activated state if the obstacle (36) is determined to be located outside the door range (R) or transferred in the activated state if the obstacle (36) is determined to be located at least in part within the door range (R). Furthermore, a data processing apparatus (58), a computer program (74), a computer-readable storage medium (72), and a locking system (52) for a vehicle (10) are claimed.