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cameralink cameras with truesense imaging
sensors
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Debouncer:
Please note that the edges
of valid trigger signals are
shifted by t
and
DebounceHigh
t
!
DebounceLow
Depending on these
two timings, the trigger
signal might be temporally
stretched or compressed.
Figure 40 ►
Principle of the Baumer
debouncer.
36
8.5.4. Debouncer
The basic idea behind this feature was to seperate interfering signals (short peaks) from
valid square wave signals, which can be important in industrial environments. Debouncing
means that invalid signals are filtered out, and signals lasting longer than a user-defined
testing time t
will be recognized, and routed to the camera to induce a trigger.
DebounceHigh
In order to detect the end of a valid signal and filter out possible jitters within the signal, a
second testing time t
DebounceLow
If the signal value falls to state low and does not rise within t
as end of the signal.
The debouncing times t
DebounceHigh
of 1 μsec.
This feature is disabled by default.
U
30V
Incoming signals
(valid and invalid)
11V
4.5V
0
Debouncer
U
30V
Filtered signal
11V
4.5V
0
8.5.5.
Flash Signal
The CameraLink
standard doesn't describe an explicite flash signal.
®
On Baumer cameras, this feature is realized by the internal signal "ExposureActive",
which can be wired to one of the digital outputs.
was introduced. This timing is also adjustable by the user.
and t
are adjustable from 0 to 5 msec in steps
DebounceLow
t
t
1
2
t
DebounceHigh
t
high time of the signal
x
t
user defined debouncer delay for state high
DebounceHigh
t
user defined debouncer delay for state low
DebounceLow
, this is recognized
DebounceLow
t
t
t
t
3
4
5
6
t
DebounceLow
high
low
t
t
high
low
t