Buildings · Strong theory
AfterHours Tracer: Through-Wall Intrusion & Tailgate Path
After hours, it sees an intruder through the walls and traces their whole path.
The physics is solid; our own validation is scheduled.
How it works
A person moving through a building casts a moving shadow in the WiFi field — even in rooms with no sensor, because the waves pass through interior walls. The system reconstructs where they entered, which rooms they walked through, and where they lingered. At secure doors it also counts bodies, so two people on one badge is caught.
In the physics: A moving human is an unignorable Doppler source and shadowing body even NLOS (through-wall LOS/NLOS AUC 0.69 proven); RTI differential attenuation across the mesh triangulates position to 0.5-1m and sequential frames give trajectory; two closely-spaced walkers produce separable RTI blobs and distinct gait micro-Doppler cadences at a doorway.
See it work
This is real pipeline output for Buildings, replayed. The exact reading depends on your room.
Go deeper
How the field becomes an answer
How we prove it
OPERAnet and EHUNAM for tracking accuracy; WiMANS for two-person separation at close spacing; own-hardware: scripted after-hours intrusions across a 3-room office comparing track vs floorplan ground truth and door-badge logs.
Who it is for
For the corporate security director: 'Alarm systems tell you something moved; we hand your guards the intruder's footpath on the floorplan, through walls, with no cameras to subpoena.'
runtime Runs today in LatentField 2.0 as intrusion
The matching solution
Complete first-room estimateFloor Utilization Node3 nodes · ~$130 parts · 90 min Request kit, subscribe, or set up →Compatible DIY hardware options
120 min · advanced
240 min · installer