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SBV System Series| Instruction manual v1.2 DEC 2021 |SAF-UM-SBVBus-en-v1.2|© 2021 Inxpect SpA
5. Sensor position
5.4 Calculation of range of distances
5.4.1 Introduction
The range of detection distances for a sensor depends on the inclination (α) and the installation heights (h) of the
sensor. The detection distance of each detection field (Dalarm) depends on a distance d that must be within the
range of distances allowed.
The formulas for calculating the distances are reported as follows.
WARNING! Define the optimum sensor position according to the risk assessment requirements.
5.4.2 Legend
Element Description Measurement unit
α Sensor inclination degrees
h Sensor installation height m
d Detection distance (linear)
Must be within the range of distances allowed
(see "Installation configurations" below).
m
Dalarm Detection distance (real) m
D
1
Start detection distance (for configuration 2 and
3); end detection distance (for configuration 1)
m
D
2
End detection distance (for configuration 3) m
5.4.3 Installation configurations
Three configurations are possible, according to the inclination of the sensor (α):
l ≥ +20°:configuration 1, the field of view of the sensor never intersects the ground
l 0° or 10°: configuration 2, the upper portion of the field of view of the sensor never intersects the ground
l ≤ -10°:configuration 3, the upper portion and the bottom portion of the field of view always intersect the
ground
5.4.4 Calculate the range of distances
The range of detection distances for a sensor depends on the configuration:
Configuration Range of distances
1 From 0 m to D
1
2 From D
1
to 5 m
3 From D
1
to D
2
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