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When there is a fire, because of smoking in the line of sight. Both choices and firefighters are hard to understand the fire position and status.
this lesds to the scene of the fire is often chaotic. This for the escape and firefighters security caused great hidden trouble.
This design by building the temperature sensing device is installed in the exit signs and wireless transmitting device.
All the city construction of temperature data, to form a set of early warning based on temperature, escape, firefighting sustem of fire control data.
Dalian Minzu University