PoE Lighting PSE Device Emergency Power Detection
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Solution Overview
Problem
Existing PoE lighting systems face limitations in providing prolonged emergency lighting due to the limited capacity of backup power sources, leading to eventual power depletion and loss of lighting functionality.
Innovation Solution
A Power Source Equipment (PSE) device with a power detection unit, output power providing unit, and control unit that adapts power consumption based on whether primary or backup input power is received, allowing for efficient utilization of limited power in emergency situations by controlling lighting units to reduce power consumption and extend emergency lighting duration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If backup batteries are used to provide emergency power to lighting units, then emergency lighting can be maintained, but the duration of emergency lighting is limited due to battery capacity
Solution Approach 1:
The system changes the operational parameters of lighting units during emergency mode by detecting backup power input and automatically adjusting power consumption levels. The control unit modifies operating parameters such as light intensity or operational timing to match the limited capacity of backup power sources, thereby extending the duration of emergency lighting beyond what would be possible with standard operating modes.
Solution Approach 2:
The system dynamically adapts its operation based on power source availability. When backup power is detected, the control unit dynamically adjusts the power consumption of lighting units in real-time, transitioning from static full-power operation to dynamic reduced-power operation, which maximizes the utilization of limited battery capacity and extends emergency lighting duration.
2Illumination intensity
If full power is provided to all lighting units during emergency, then lighting brightness is maintained, but power is depleted quickly
Solution Approach 1:
The system applies partial action by providing reduced power to lighting units during emergency mode instead of full power. The control unit selectively adjusts power delivery based on detected backup power input, maintaining sufficient illumination for safety while consuming less energy, thereby extending the duration of emergency lighting operation.
Solution Approach 2:
The system may implement periodic operation patterns during emergency mode, where lighting units operate in cycles of full power and reduced power, or where different zones are activated periodically. This allows maintenance of adequate average illumination levels while managing limited power resources to extend operational duration.
3Reliability
If additional communication means are added to detect emergency situations, then emergency detection reliability is improved, but device complexity increases
Solution Approach 1:
The system uses self-service by leveraging existing power line communication infrastructure to detect emergency situations. The PSE device monitors its own power input conditions and automatically detects when backup power is present without requiring additional external communication systems. This maintains high reliability in emergency detection while avoiding the complexity of adding separate communication means.
Solution Approach 2:
The existing power distribution system is made multi-functional by using it both for power delivery and for emergency situation detection. The PSE device utilizes its power monitoring functions, already present for normal operation, to also detect emergency conditions and trigger appropriate responses, thereby achieving reliable emergency detection without adding dedicated communication infrastructure.
Data Source
AI summary
The invention relates to a PSE device (2) to be used in a PoE lighting system (1), wherein the PSE device (2) is adapted to receive input power from a power providing system (7). The PSE device (2) comprises a power detection unit for detecting whether the received input power is primary input power or backup input power, wherein the PSE device (2) is adapted to control the power consumption of lighting units (31, 32) depending on the power detection. This allows for an indication of an emergency situation, in which the backup input power is provided, to the PSE device (2) without necessarily requiring data communication means. Moreover, the power consumption of the lighting units (31, 32) can be more efficiently utilized in case of emergency.