Introduction
Staircases are high-risk areas for falls, especially in the dark. PIR sensors can trigger lighting when someone approaches, improving safety and saving energy.
Applications
Automatic Stair Lighting
Lights turn on when person approaches staircase, turn off after they pass. Can be zoned to light only the steps being used.
Fall Detection
Detect if someone falls on stairs and trigger alert.
Direction Detection
With multiple sensors, detect whether person is going up or down to control lighting accordingly.
Sensor Placement
- Top and bottom of stairs: Detect approach.
- Midway: For fall detection and tracking.
- Under handrail: Discreet placement.
Lighting Control Logic
If (top sensor triggered) AND (down direction detected) -> Light staircase from top down. If (bottom sensor triggered) AND (up direction detected) -> Light staircase from bottom up. If (motion continues) -> Keep lights on. After last motion -> Fade lights off after delay.
Case Study: Apartment Building
An apartment building installed PIR-controlled LED strip lighting on staircases. Energy consumption for stair lighting dropped by 90% compared to always-on lighting.
Safety Benefits
Well-lit stairs reduce fall risk. In a study, well-lit staircases had 60% fewer accidents.
Conclusion
PIR sensors make staircases safer and more energy-efficient. They are a low-cost upgrade for any building.