3.4.8.5
Average filter
Using the mean filter, a blockwise (not moving) arithmetic average is calculated from
the configured number of scans and then outputted. The big advantage when using this
filter: Potential noise, i.e. minimal deviation of values, is reduced, which also lowers the
quantity of data.
15 m
17 m
Figure 22: Without the mean filter: The device
detects and processes all received signal val‐
ues.
Ø 16 m
Figure 23: Using the mean filter: The device
calculates an average value from several sig‐
nal values.
3.4.8.6
Edge filter
The edge filter eliminates erroneous or extreme distance values at edges. These arise
as a result of laser light that partially hits an object in the front and partially hits an
object farther away, or due to too little light remission at the object itself,
of object surfaces on the measurement", page 13
. The filter evaluates the difference in
distance between adjacent points.
When the edge filter is activated, the device sets the distance value to 0 at each edge
(values in
bold
) as soon as the parameterized neighbor distance has been exceeded in
the edge filter area.
Table 5: Example: Measured values with and without edge filter
Angle (distance values in mm)
Scan
1
2
3
4
5
6
7
…
1, not filtered
0
750
1145
1150
1147
1500
0
…
1, filtered
0
0
1145
1150
1147
0
0
…
The edge filter enables points to be entirely suppressed at the outer edges of the
object. In this case, the width of an object is detected by up to 2× angular resolution too
narrow.
Maximum neighboring distance
The maximum distance difference in millimeters between two measuring points on the
edge can be parameterized. A measuring point on the edge that has a greater distance
difference than the parameterized value to its adjacent measuring point is taken into
account.
Maximum edge filter range (range limitation)
The maximum distance can be set up to 16,000 mm. The measuring points in the
parameterized range are taken into account.
3.4.9
Scan data output
The device has 4 modules, which are aligned with one plane.
The scan data is always output on a per module basis. The data for a specific module is
output every 7 ms. The device requires 28 ms to output the data for all four modules.
In the data message, the individual scans are identified by their time stamp.
PRODUCT DESCRIPTION
3
8023051/1AZG/2021-05-10 | SICK
O P E R A T I N G I N S T R U C T I O N S | LMS1104C-111031S01
21
Subject to change without notice
