4.3.13 Mobile hazardous area protection
Overview
T
he camera sensor is mounted in a mobile application, for example on an automatic
guided vehicle. In mobile hazardous area protection, the camera sensor protects the
hazardous area created by the vehicle’s movement.
The camera sensor detects the legs or body of a person depending on the object
resolution. The protective fields must cover all hazardous areas around the vehicle,
the general driving area directly in front of the vehicle and, if applicable, additional
hazardous areas along the lateral contour of the vehicle. The extent of the protective
fields must be selected so that the required minimum distances, tolerance zones, and
stopping distances are contained within them.
Figure 22: Mobile hazardous area protection
Important information
NOTE
In the following calculation examples, only the vehicle speed is taken into account,
not the speed of a walking person. This is based on the assumption that the person
recognizes the danger and stands still.
4.3.13.1 Protective field
In mobile hazardous area protection, the minimum distance typically determines the
pr
otective field size required. The minimum distance allows the vehicle to stop in time
before it reaches a person or an object. When calculating the protective field length, the
impact of turning must be considered separately.
The protective field must be wide enough to cover the width of the loaded vehicle plus
supplements for measurement error and the clearance from the floor.
If you define a number of monitoring cases with different protective fields, you must
calculate the protective field size separately for each protective field used.
4.3.13.2 Calculation example for the protective field length
Overview
P
arallel approach to the optical axis is assumed for mobile hazardous area protection.
Calculation example for the protective field length S
L
S
L
= S
A
+ T
Z + Z
F
+ Z
B
+ C
PROJECT PLANNING 4
8025919/1I9E/2023-01-09 | SICK O P E R A T I N G I N S T R U C T I O N S | safeVisionary2
35
Subject to change without notice
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