Structure and function
3
Function
22
Building Technologies 007016_i_en_--
Fire Safety 2012-09-07
3.3.1 Infrared ray
Setup of the infrared ray
The infrared ray is scattered, giving it a conical shape. The radiation energy
decreases outwards. The infrared ray is divided into the following three ranges:
Effective range (1): The effective range is the connection between the
transmitter, reflector and receiver.
Core range (2): In the core, enough radiation energy is present to operate the
system.
Scattering range (3): The radiation energy in the scattering range is insufficient
and does not ensure the functionality of the system.
FDL
DLR
1 2
3
Setup of the infrared ray
1 Effective range 3 Scattering range
2 Core range
1
2
3
DLR
d
0,57°
0,57°
FDL
Diameter of the core
1 Opening angle d Diameter of the core range
depending on the detection
distance
2 Diameter of the core l Detection distance
3 Infrared ray
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