Wireless Lighting Low-Battery Mode for Predictable Luminaire Operation
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Solution Overview
Problem
Conventional wireless lighting control systems with battery-powered controls face challenges due to unpredictable behavior when battery levels are low, particularly in emergency situations where reliable lighting is crucial.
Innovation Solution
The implementation of a low battery luminaire activation protocol that allows luminaires to enter a predictable low battery mode, ensuring they operate reliably even when battery-powered control devices have depleted batteries, by automatically adjusting lighting output and communication strategies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If battery-powered control devices are used to control luminaires, then ease of installation and wireless operation are improved, but reliability deteriorates when battery power is depleted
Solution Approach 1:
The luminaire proactively determines when the control device has low battery power and automatically enters low battery mode in advance, before complete battery depletion occurs. This preliminary action ensures the luminaire is already configured to operate reliably when the control device battery is depleted, eliminating the need for reactive measures and maintaining continuous operational reliability.
Solution Approach 2:
The system implements a feedback mechanism where the luminaire receives battery level information from the control device, processes this information to determine low battery status, and automatically adjusts its operational mode accordingly. This closed-loop feedback ensures the luminaire responds appropriately to changing battery conditions and maintains reliability throughout the battery's operational lifecycle.
2Device complexity
If battery-powered control devices operate without low battery mode, then device complexity is reduced, but unpredictable behavior occurs when battery is depleted
Solution Approach 1:
The luminaire autonomously monitors battery status information received from the control device, self-determines when low battery conditions exist, and automatically switches to low battery mode without requiring external intervention or complex control logic. This self-service approach maintains predictability while minimizing the added complexity to the system.
3Reliability
If luminaire automatically enters low battery mode, then reliability is improved during battery depletion, but energy consumption increases
Solution Approach 1:
The luminaire implements low battery mode as a partial action state rather than full operational mode. In this mode, the luminaire provides sufficient lighting to maintain safety and egress functionality during emergency conditions, but may operate at reduced capacity compared to normal mode. This partial action approach ensures reliability during battery depletion while minimizing unnecessary energy consumption.
Data Source
AI summary
A luminaire or lighting control device includes a network interface with a transceiver configured for communication via a lighting control network for lighting control and systems operations. The device can include a light source to emit illumination lighting, a driver circuit to control operation of the light source, and a power supply. The device includes a processor coupled to the network interface, and a memory accessible to the processor that stores a battery level threshold. The device includes programming in the memory. Execution of the programming by the processor configures the device to implement the following functions. First, the device receives a lighting control message. Second, the device determines a battery level of a power switch. Finally, in response to the battery level of the power switch being less than the battery level threshold, the device controls the luminaire or another luminaire to enter a low battery mode.