
Configuring the sensor – Overview of functions
Leuze electronic
OGS 600
45
TNT
35/7-2
4
V
7.7
"Trace amplitude" filter
The filter is based on the assumption that the guide trace tape processed in a system is the
same throughout. If this is the case, then the guide trace tape is a known constant. As a
result, all other markings with a different amplitude can be filtered out.
It is therefore recommended to select a guide trace tape which is as light as possible (white)
or as dark as possible (black) so that there are no markings which are darker or lighter than
the optical trace.
The filter for trace amplitude is the limit value
TraceAmplitudeMin
(UART index 106
d
and
CAN index 2010
h
[7
h
]) which marks as incorrect all traces for which the amplitude of the
trace signal is greater than the limit value. There is a warning threshold which is set using
the
TraceAmplitudeWarning
parameter (UART index 107
d
and CAN index 2010
h
[8
h
]).
Figure 7.7:
Application of the "Trace amplitude" filter using a dark trace as an example
0
3000
y
x
A
B
C
D
x
Edge position
y
Reception signal amplitude
A
Left edge of guide trace
B
Right edge of guide trace
C
Trace width
D
Amplitude of background
E
Amplitude of guide trace
F
Invalid trace amplitudes (red area)
G
TraceAmplitudeMin
value
H
TraceAmplitudeWarning
value
G
E
F
H