Frontier · Frontier
Structural Micro-Drift Sentinel
It notices a building sagging by millimeters, over weeks.
Plausible physics, early work — shown honestly as an experiment.
How it works
Every wall and ceiling reflects signal with a timing fixed by its exact position — a millimeter of movement shifts the echo by a hair. One snapshot cannot see something that small, but weeks of patient averaging can. Slow creep in a joist, a foundation, or a facade panel shows up long before a crack does.
In the physics: A specular reflection off a structural surface has delay set by geometry to ~3.3 ps per mm of path change; super-resolved CIR delay tracking integrated over weeks can resolve slow displacement far below single-snapshot noise. Cracking/delamination also changes the layered-media reflection coefficient (amplitude/phase of that tap) even before gross displacement. Vibration modal frequencies of the element (Stage 2 band) shift when stiffness degrades.
See it work
This is real pipeline output for Frontier, replayed. The exact reading depends on your room.
Go deeper
How the field becomes an answer
How we prove it
Own-hardware: instrumented loaded shelf/joist testbed with micrometer displacement stage — command 0.5-5 mm displacements over days under realistic occupancy noise; verify CUSUM detection and displacement scaling. Leverage the 119-day drift-control deployment as the null baseline.
Who it is for
'A structural nervous system from your WiFi' — continuous settlement/creep telemetry for building owners, warehouse rack-safety programs, and post-earthquake triage, at 1/100th the cost of strain-gauge instrumentation.
runtime Runs today in LatentField 2.0 as presence
The matching solution
Complete first-room estimateField Lab Kit6 nodes · ~$320 parts · 120 min Request kit, subscribe, or set up →Compatible DIY hardware options
60 min · intermediate
240 min · installer