Railway Sound Diffusion System for Visually Impaired Navigation

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Solution Overview

Problem

Existing sound broadcasting systems in railway vehicles are inadequate for visually impaired individuals, as they rely on visual displays that cannot be accessed by those with visual impairments, limiting their ability to find their assigned car and navigate the vehicle.

Innovation Solution

A sound diffusion system integrated into railway vehicles, comprising groups of speakers and a control device that broadcasts specific sound signals via a receiving device activated by a remote control or mobile terminal, allowing visually impaired passengers to receive information about the vehicle number, destination, and access doors through audible messages.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If visual displays are used to show vehicle number and destination, then information is clearly visible to passengers, but visually impaired passengers cannot access this information

Engineering Contradiction:

Improveinformation accessibilityVSAvoidaccessibility for visually impaired people

Core Design Contradiction:

Loss of informationVSAdaptability or versatility

Solution Approach 1:

The patent replaces the visual display system with an acoustic broadcasting system. Loudspeakers distributed throughout the vehicle convert visual information (vehicle number, destination, car number) into audible sound signals, allowing visually impaired passengers to access information through hearing rather than sight.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces an intermediary conversion system that translates visual information into acoustic form. A control device receives information and converts it into sound signals that are broadcast through loudspeakers, serving as a mediator between the visual display system and visually impaired passengers.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If a sound broadcasting system is added to help visually impaired passengers, then information accessibility is improved, but device complexity increases

Engineering Contradiction:

Improveaccessibility for visually impaired peopleVSAvoidsystem complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The control device is designed to serve multiple functions: it manages both visual displays and acoustic broadcasting, controls multiple loudspeakers throughout the vehicle, and processes information from various sources. This multi-functionality reduces the need for separate dedicated systems.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the acoustic broadcasting system with the existing visual display system by using a common control device. The control device that manages visual displays also controls the loudspeakers, combining information delivery functions into a single integrated system.

Inventive Principle:

Principle #5Merging (Combining)

3Loss of information

If loudspeakers are distributed throughout the vehicle, then information coverage is improved, but device complexity and cost increase

Engineering Contradiction:

Improveinformation coverageVSAvoidnumber of loudspeaker groups

Core Design Contradiction:

Loss of informationVSDevice complexity

Solution Approach 1:

The acoustic broadcasting system is divided into multiple independent loudspeaker groups distributed throughout different sections of the vehicle. Each group can be controlled independently or collectively, allowing localized information broadcasting while maintaining overall system coordination through the central control device.

Inventive Principle:

Principle #1Segmentation

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

Enables visually impaired passengers to easily locate and access their assigned car by broadcasting specific sound signals, improving communication and navigation within the vehicle, with a system that is integrated, reliable, and compatible with existing communication devices.

Implementation Method 1

Each loudspeaker (38) is an electroacoustic transducer designed to broadcast a sound signal to passengers located in the corresponding broadcast area

Methodology Applied

Scientific EffectElectroacoustic transduction:

Data Source

PatentEP3793220B1Sound diffusion system embedded in a railway vehicle and associated vehicle, method and computer program

Publication Date: 2024.04.10 SPEEDINNOV

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AI summary

The invention relates to a sound diffusion system (14) carried in a railway vehicle (10) and comprising: - a plurality of loudspeaker groups (32) distributed in the cars (12), each loudspeaker group being located in a respective diffusion zone of the railway vehicle (10); - a control device (34) for the loudspeakers (38) configured for the diffusion of generic sound signals via the different loudspeaker groups; and - at least one receiving device (36), each receiving device (36) being associated with a single loudspeaker group and being suitable for receiving a control signal from a control device (42) external to the railway vehicle, the control device being configured, upon receipt of a control signal by one of the receiving devices, for the diffusion of a specific sound signal only via the associated loudspeaker group.