Classroom Lighting Control with Daylight Harvesting and Occupancy Sensing
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Solution Overview
Problem
Existing classroom lighting systems lack flexibility and energy efficiency, failing to meet the diverse lighting needs of modern educational environments while adhering to increasingly stringent energy codes, and require solutions that are cost-effective, easy to install, and simple to use.
Innovation Solution
A system comprising luminaires, control switches, occupancy detectors, and photocells connected to a central control module with a user interface, memory card for configuration, and automatic daylight harvesting control, enabling multiple lighting scenarios, programmable dimming rates, and seamless system replication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If static lighting systems are designed to IES specifications, then lighting requirements are met, but energy consumption is high and flexibility is poor
Solution Approach 1:
The patent implements dynamic lighting control through occupancy sensors that detect presence and adjust lighting accordingly, and daylight harvesting sensors that respond to natural light levels. The system transitions from static IES-compliant lighting to dynamic adjustment based on real-time environmental conditions, achieving both flexibility and energy savings
Solution Approach 2:
The system incorporates feedback loops through occupancy detectors and photocells that continuously monitor classroom conditions and automatically adjust lighting levels. This closed-loop control enables the system to adapt to changing conditions while maintaining energy efficiency and visual comfort
2Loss of energy
If occupancy sensing and daylight harvesting are implemented, then energy savings are achieved, but system complexity increases
Solution Approach 1:
The patent combines occupancy sensing, daylight harvesting, and lighting control into a single integrated system managed by one controller. This consolidation reduces the number of separate components and simplifies installation while maintaining the energy-saving benefits of multiple control strategies
Solution Approach 2:
The controller is designed to perform multiple functions including occupancy detection response, daylight harvesting calculation, lighting scene management, and energy monitoring. This multi-functional approach eliminates the need for separate dedicated devices for each control strategy, reducing overall system complexity
3Adaptability or versatility
If multiple lighting scenarios are provided for different educational activities, then functional needs are met, but control complexity increases
Solution Approach 1:
The system pre-configures multiple lighting scenes (e.g., lecture mode, group work mode, presentation mode) with optimized lighting levels for each educational activity. These scenes are automatically selected based on occupancy patterns and daylight conditions, eliminating the need for manual adjustment and simplifying user interaction
Solution Approach 2:
The controller automatically selects and adjusts lighting scenes based on inputs from occupancy sensors and daylight harvesting data without requiring manual intervention. The system self-adjusts to provide appropriate lighting for different educational activities, reducing operational complexity while maintaining versatility
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 provides flexible and energy-efficient lighting solutions that meet the varied needs of classrooms, reducing energy costs and adhering to regulatory requirements while being easy to install and operate, ensuring continuous lighting and efficient energy management.
Implementation Method 1
photocells connected to a central control module
Data Source
AI summary
A control system including a high voltage device, a low voltage device, and a central control module. The central control module includes a first low voltage connection for receiving at least one first control signal from the low voltage device and a high voltage connection for providing at least one second control signal to the high voltage device. The central control module is configured to determine a daylight conversion factor based on the at least one control signal, wherein the at least one second control signal is based at least in part on the daylight conversion factor.