![background image](http://html1.mh-extra.com/html/ifm/o3m-zz1103/o3m-zz1103_instructions-for-setup_3920741049.webp)
49
O3M area surveillance
UK
12 Terms and abbreviations
Term
Description
ROI
The region of interest defines the area to be monitored�
FoV
The field of view describes the area covered by the angle of aperture of the 3D
sensor�
13 Frequently asked questions
Problem
Solution
False triggering during
operation when there is
a lot of dust�
If there are lots of dust particles in the air, they may be misinterpreted as
objects�
► In the expert settings, set the "low-quality pixel filter" to a higher level (→
False triggering when
driving on a ramp�
Driving on a ramp can result in different angles between the vehicle and
the ground� As a result, the 3D sensor measures the ground higher than it
actually is� In extreme cases, the measurement is higher than the set minimum
detection height (→ "10.1.4 Zone definition - default settings").
► Change the object detection type to "Reflector" (→ "10.1.3 Configuration
> Afterwards, the yellow zone is only triggered by objects with reflectors (e�g�
safety vests).
► Set the minimum detection height in steps (→ "10.1.4 Zone definition -
> For example, set the red zone to the lowest detection height, the orange
zone to the medium detection height and the yellow zone to the highest
detection height�
Automatic calibration is
not successful�
During automatic calibration, the 3D sensor measures the ground in the field
of view� For calibration, the ground must be level and free of obstacles�
►
Clear the 3 m wide and 3 m long field of view in front of the 3D sensor�
► Avoid reflective grounds (e.g. industrial floor or wet floor).
► Adjust the manually set parameters for calibration (→ "10.1.3 Configuration
> The manually set parameters are used as start values for the automatic
calibration� If the manually set parameters deviate too much from the
automatically determined ones, the automatic calibration will not be
completed successfully�
The automatic
calibration determines
height values that are
too high
If there are walls near the field of view, the automatic calibration determines
height values that are approx� 10-20 cm too high�
►
Ensure that there are no walls near the field of view during automatic
calibration�
Reflector objects are
not detected� Normal
objects are detected as
reflector objects�
A reflector object is classified via a threshold value� If the threshold value is too
high or too low, the objects are not detected correctly:
●
The threshold value is set too high: Reflector objects are not detected�
●
The threshold value is set too low: Normal objects are detected as reflector
objects�
► Adjust the reflector detection threshold (→ "10.1.2 Expert settings").