Railway Vehicle Lighting Control for Passenger Density and Position
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Solution Overview
Problem
Current light management systems in railway vehicles are basic and lack versatility, failing to enhance passenger comfort and safety by not providing useful information through lighting adjustments based on passenger density, vehicle position, and time.
Innovation Solution
A light management device with sensors to measure passenger density, vehicle position, and time, connected to a control unit that adjusts optical characteristics of light sources such as wavelength, luminous flux, and color temperature to improve passenger experience by providing information and optimizing lighting conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If basic binary light control is used, then device complexity is reduced, but adaptability and versatility are worsened
Solution Approach 1:
The lighting system performs multiple functions: it provides illumination, communicates vehicle position to passengers, indicates passenger density levels, and synchronizes with circadian rhythms. A single integrated control system handles all these functions by processing data from various sensors and adjusting lighting parameters accordingly, eliminating the need for separate control systems for each function.
Solution Approach 2:
The lighting system transitions from static binary control to dynamic continuous adjustment. The control unit continuously receives input from sensors measuring vehicle position, passenger density, and time, then dynamically adjusts lighting parameters (intensity, color temperature, timing) in real-time to optimize for current conditions.
2Adaptability or versatility
If multiple sensors and dynamic control are added, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple sensors (position sensors, passenger density sensors, time sensors) and multiple lighting functions into a single integrated control system. The control unit processes all sensor inputs and coordinates all lighting adjustments through one centralized system, reducing the complexity that would arise from having separate control systems for each sensor and function.
Solution Approach 2:
The control unit serves as a universal controller that handles positioning information, passenger density monitoring, timing synchronization, and lighting control all through a single device, making the system versatile while managing complexity through consolidation.
3Ease of operation
If lighting is adjusted based on multiple parameters, then passenger comfort is improved, but energy consumption increases
Solution Approach 1:
The lighting system synchronizes with circadian rhythms by adjusting lighting parameters periodically according to time of day. During nighttime travel, the system reduces lighting intensity and adjusts color temperature to match natural circadian patterns, reducing energy consumption while maintaining passenger comfort. During daytime, full lighting functionality is restored.
Solution Approach 2:
The system dynamically changes lighting parameters (intensity, color temperature, timing) based on current conditions such as vehicle position, passenger density, and time of day. By adjusting parameters rather than maintaining constant high-level lighting, the system maintains passenger comfort while reducing overall energy consumption, particularly during nighttime operations.
Data Source
AI summary
The invention relates to a light management device for a vehicle, in particular a railway vehicle, the vehicle comprising at least one car. The device comprises:at least one light source, the at least one light source emitting light radiation with at least one optical characteristic,at least one sensor selected from a sensor for measuring a passenger density aboard the vehicle, such as an axle load sensor, a vehicle position sensor, and/or a clock,a control unit connected to the at least one sensor, and to the at least one light source, the control unit being configured to control the at least one optical characteristic of the light radiation based on a measurement of the at least one sensor.