Railway Compartment Lighting with Dynamic Sensor Control
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Solution Overview
Problem
Transport vehicle passenger compartment lighting systems consume excessive energy, particularly in sunny weather due to inadequate brightness measurement and control, leading to unnecessary light output.
Innovation Solution
A lighting system with light sensors and presence sensors that adjust light intensity based on ambient light levels and occupancy, using a control unit to dynamically adjust light sources to maintain optimal illumination between 50 lux and 150 lux, reducing energy consumption by minimizing light output when not needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light source delivers high light power to ensure sufficient illumination in cloudy weather, then the illumination quality is improved, but the energy consumption increases unnecessarily in sunny weather
Solution Approach 1:
The lighting system dynamically adjusts the light power output based on real-time ambient light conditions detected by the sensor. The control unit modifies the illumination intensity according to whether it is sunny or cloudy weather, rather than maintaining a fixed high output level, thereby optimizing energy consumption while ensuring adequate illumination.
Solution Approach 2:
The system incorporates a light sensor that continuously monitors ambient light conditions and feeds this information back to the control unit. Based on this feedback, the control unit automatically adjusts the light source output to match the actual illumination needs, preventing unnecessary energy consumption in bright conditions while ensuring sufficient light when needed.
2Ease of operation
If the light source provides high illumination to ensure comfort in all weather conditions, then the passenger comfort is improved, but the energy consumption increases due to unnecessary light output in sunny weather
Solution Approach 1:
The system changes the operating parameters of the light source based on ambient conditions. By adjusting the light power output parameter according to weather conditions (sunny vs. cloudy), the system maintains passenger comfort when needed while avoiding energy waste when natural light is sufficient.
Solution Approach 2:
The lighting system serves itself by automatically detecting ambient light conditions and adjusting its own output without requiring manual intervention. The control unit autonomously decides when to reduce or maintain illumination levels based on sensor feedback, eliminating the need for passengers to manually control lighting while optimizing energy usage.
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
The system effectively reduces energy consumption by dynamically adjusting light levels according to ambient light and occupancy, ensuring comfortable lighting while minimizing unnecessary energy use.
Implementation Method 1
At least one light sensor 22 of the lighting device 15 is fixed inside the passenger compartment 6
Implementation Method 2
Each seat 10 is provided with a passenger presence sensor 24
Implementation Method 3
The light sources 16 are, for example, light-emitting diode lights
Data Source
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AI summary
This transport vehicle (2), in particular a railway carriage, comprises at least one passenger compartment (6), comprising a number of seats (10) for passengers, and a device for lighting the passenger compartment (6), said device comprising: at least one light source (16) fastened to the inside of the passenger compartment (6), and a control unit (27) connected to the light source (16). The lighting device comprises at least one light sensor (22) connected to the control unit (27) and able to provide a measurement signal of the light intensity in the passenger compartment (6), and the control unit (27) is able to control each light source (16) as a function of the signal provided by each light sensor (22). The lighting device comprises, for each seat (10), a presence sensor (24), connected to the control unit (27), and a light source (16), and the control unit (27) is able to control each light source (16) as a function of a passenger absence or presence signal provided by each presence sensor (24).