Train Platform Door Harmonization via Point-to-Point Control

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Solution Overview

Problem

Existing systems for harmonizing the operating status of train and platform doors face delays in communication, making on-demand opening functionality difficult and failing to provide sufficient notice to passengers when doors are non-operational, which hampers efficient boarding and disembarkation.

Innovation Solution

A distributed architecture with point-to-point communication between door control units, using adapter devices to exchange door opening and isolating signals, ensuring both doors are in the same operational status and allowing immediate harmonized opening or isolation, and alerting passengers of non-operational doors through an independent external communication system.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a centralized communication system is used between train and platform control units, then door harmonization control is achieved, but communication delay increases making on-demand opening functionality unviable

Engineering Contradiction:

Improvedoor harmonization controlVSAvoidcommunication delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The centralized communication system is segmented into multiple point-to-point communication channels between individual door control units. Each door control unit communicates directly with its paired door's control unit, eliminating the need for centralized mediation and reducing communication delay while maintaining harmonization control.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Door control units act as intermediaries that directly exchange opening requests and status information with paired door control units. This direct intermediary communication replaces the centralized communication path, enabling faster response times for on-demand opening functionality.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If door control units communicate through centralized systems, then door status harmonization is achieved, but response time for alerting passengers of non-operational doors is insufficient

Engineering Contradiction:

Improvedoor status harmonizationVSAvoidpassenger alert notification time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

Door control units exchange status information in advance and maintain synchronized knowledge of operational states. When a door becomes non-operational, the paired door control unit immediately receives this status change and can alert passengers without waiting for centralized system processing, providing sufficient notice for passenger safety.

Inventive Principle:

Principle #10Preliminary action

3Adaptability or versatility

If independent door control systems are used for train and platform doors, then system autonomy is maintained, but closed communication prevents viable harmonization implementation

Engineering Contradiction:

Improvesystem autonomyVSAvoidcommunication architecture complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The communication requirement is extracted from the centralized control architecture and implemented as simple point-to-point signal exchange between paired door control units. This removes the complex centralized communication infrastructure while maintaining system autonomy, as each door system remains independent but can coordinate through direct signaling.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS12139175B2System and method for harmonising the operating status of pairs of doors formed by a train door and a platform door

Publication Date: 2024.11.12 SA MASATS

AI summary

The system and method of the present invention enables the harmonisation of the operating status of pairs of train and platform doors, enables both doors to be actuated simultaneously or be disabled or isolated if one of them has been disabled or isolated by means of door isolating means and also enables the harmonisation of the opening actuation of the pair of doors by the user using door-opening request devices.