Elderly · Strong theory
Sundowning & Nocturnal Wandering Radar for Memory Care
Sees night-time wandering and pacing through the walls, and warns before someone leaves.
The physics is solid; our own validation is scheduled.
How it works
A person moving through the home casts a moving shadow in the WiFi field, even through interior walls. The system follows the path from room to room and notices pacing loops and visits to the front door. It watches movement patterns only — never faces, never sound.
In the physics: A moving body is a strong differential scatterer: RTI attenuation images localize the resident to ~0.5-1m through interior walls, and repetitive pacing produces a distinctive periodic occupancy pattern plus sustained low-frequency Doppler energy. Circadian disruption changes the time-of-day distribution of motion energy, which is directly observable without any interpretation of identity or appearance.
See it work
This is real pipeline output for Elderly, replayed. The exact reading depends on your room.
Go deeper
How the field becomes an answer
How we prove it
WiMANS multi-person activity data for trajectory/activity separation; ESP32-wall dataset for through-wall tracking fidelity; own-hardware pilot in one memory-care wing against staff incident logs and door-alarm events.
Who it is for
For memory-care directors of nursing: 'Know a resident is trending toward elopement days before they reach the door' — night-shift wandering heatmaps and drift alerts from the WiFi already in the walls.
runtime Runs today in LatentField 2.0 as through_wall_presence
The matching solution
Complete first-room estimateAging-in-Place Guardian3 nodes · ~$130 parts · 60 min Request kit, subscribe, or set up →Compatible DIY hardware options
15 min · beginner
60 min · intermediate