Table 5: Example: Measured values with and without edge filter
Measurement points (distance values in mm)
1
2
3
4
5
6
7
…
not filtered
1800
1750
1145
1150
1147
800
871
…
filtered
1800
1750
1145
1150
1147
0
871
…
The edge filter enables points to be entirely suppressed at the outer edges of the
object.
Maximum edge filter range (range limitation)
The maximum distance can be set to 8,000 mm
1)
. The measurement points within the
configured range are taken into account.
3.6.7.2
Particle filter
The particle filter blanks small, irrelevant reflection pulses in dusty environments and
in rain or snow which are caused by dust particles, raindrops, snowflakes or the like. In
doing so, successive scans are continuously evaluated in order to detect static objects.
!
Figure 12: Without the particle filter: Violation
of the contour due to dust particles in the
vicinity of the object.
"
Figure 13: Using the particle filter: The
response to dust particles in the field is
delayed by one scan. Particles can thereby be
blanked.
3.6.7.3
Median filter
This filter is suitable for excluding individual outliers from the calculation of an average
value.
The values included in the calculation are defined using a 1 x 3 matrix:
3 measured values, consisting of the distance values of a point and its two adjacent
points in the scan, are sorted by size.
The measured value in the middle of this sequence is output as the distance value,
along with its remission value.
The calculation and output of the media values are done statically.
By activating the media filter, 3 distance values within a scan can be reduced to one
output value, which reduces the number of output values to 1/3 compared to the
unfiltered scan.
Table 6: Example: Median for scan 1 and 2
Angle (distance values in mm)
Scan
1
2
3
4
5
6
7
8
...
1
850
852
851
849
850
850
851
850
...
1)
For the variants TiM310 / TiM320, the maximum distance can be set to 4,000 mm.
3
PRODUCT DESCRIPTION
20
O P E R A T I N G I N S T R U C T I O N S | TiM781
8024231/1G72/2022-05-27 | SICK
Subject to change without notice
