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Chimney
Sentinel
The Chimney Sentinel is aimed at preventing fires caused by
wood-burning appliances. The device consists of a probe inserted
in the chimney and a remote microcontroller-based monitoring
unit. When a fire is detected, the Chimney Sentinel sounds an
alarm (before smoke has time to reach other detectors within
the home). Additionally, it helps prevent fires by monitoring
the conditions in the chimney. Creosote tends to build up in
chimneys when the temperature in the flue is too low; this build-up
can lead to a fire. The Sentinel detects when the flue temperature
is in the danger range, and then sounds an alarm if the temperature
does not move through the danger zone quickly enough. Even if
the heat is such that the sensor is destroyed (the melting point
is in excess of 2500°F), the monitor will continue sounding
an alarm. The heart of the circuit is an 8-bit PIC16F628 microcontroller
with flash memory.
Spehro
Pefhany, Canada
speff@interlog.com
Abstract
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