Threshold bands
Multiple fusible links for a rough thermal timeline, not just a binary event.
Concept / field prototype 01
Give the fireline
a witness.
A disposable thermal-trigger marker that turns an escaping prescribed burn into a visible, timestamped event.
Designed as a research concept — never a replacement for active fire watch.
LIVE OVERHEAD VIEW37° 18′ 42″ N
BOUNDARY STATUSMONITORING
01 / 05Prescribed burn, western range
01 / Watch the boundary
Make the invisible
impossible to miss.
Deploy a loose constellation of markers around a planned fire perimeter. When heat crosses the line, each marker becomes a small, undeniable witness.
CAM 01
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02
03
04
05
PLANNED PERIMETER
ACTIVE FIRE EDGE
0:00 / DEPLOY42% / SIMULATION5:00 / PEAK
02 / Inside the marker
Simple parts.
Specific behavior.
The mechanism is deliberately low-tech: a short-lived package of material intelligence, tuned to react only when the fire arrives.
Selected component / 01
Cellulose shell
A flat, biodegradable casing protects the payload during a short deployment window.
NO BATTERYStored thermal energy only
NO RADIOSignal travels through air
FIRE-POWEREDActivation is the event
03 / Design the signal
One trigger.
Many ways to know.
Different terrain demands different confirmation. The marker can be tuned as a visual, acoustic, or machine-readable witness.
Primary signal
A witness mark in the smoke
A vivid dye or powder cloud makes the moment of boundary escape visible to crews and overhead imaging.
04 / From plan to proof
A calm system
for a hot edge.
The promise is not prediction. It is a clearer handoff between a planned line, a changing fire, and the people responsible for both.
01
Plan line
Mark the perimeter and record the drop pattern.
02
Deploy
Place low-profile markers before ignition.
03
Trigger
Heat opens the seal at the boundary.
04
Confirm
Crew, camera, and sound agree on the event.
05
Model
Feed the witness marks into the next plan.
Before field testing
Questions worth
asking early.
- How does wind drift affect the visual plume?
- What acoustic range is useful over active fire?
- What materials leave the smallest ecological footprint?
- Where do false triggers appear in real heat profiles?