54
Configuration Example
10.5.2
For the three employed cameras the following data are known:
Camera
Model
Sensor
Resolution
[Pixel]
Pixel Format
(Pixel Depth)
[bit]
Resulting
Data Volume
[bit]
Readout
Time
[msec]
Exposure
Time
[msec]
Transfer
Time (GigE)
[msec]
VLG-12M.I 1288 x 960
8
9891840
23.8
32
≈ 9.2
VLG-20M.I 1624 x 1228
8
15954176
37
32
≈ 14.9
VLG-02M.I 656 x 490
8
2571520
6.4
32
≈ 2.4
The sensor resolution and the readout time (t
▪
readout
) can be found in the respective
Technical Data Sheet (TDS). For the example a full frame resolution is used.
The exposure time (t
▪
exposure
) is manually set to 32 msec.
The resulting data volume is calculated as follows:
▪
Resulting Data Volume = horizontal Pixels × vertical Pixels × Pixel Depth
The transfer time (t
▪
transferGigE
) for full GigE transfer rate is calculated as follows:
Transfer Time (GigE) = Resulting Data Volume / 1024
3
× 1000 [msec]
All the cameras are triggered simultaneously.
The transmission delay is realized as a counter, that is started immediately after the sen-
sor readout is started.
Camera 1
(TXG13)
Trigger
Camera 2
(TXG06)
Camera 3
(TXG03)
t
exposure(Camera 1)
t
exposure(Camera 2)
t
exposure(Camera 3)
t
readout(Camera 3)
t
transferGigE(Camera 3)
t
readout(Camera 2)
t
transferGigE(Camera 2)
t
readout(Camera 1)
t
transfer(Camera 1)*
TransmissionDelay
Camera 2
TransmissionDelay
Camera 3
Timings:
A - exposure start for all
cameras
B - all cameras ready for
transmission
C - transmission start
camera 2
D - transmission start
camera 3
* Due to technical issues
the data transfer of
camera 1 does not take
place with full GigE
speed.
Figure 48 ►
Timing diagram for the
transmission delay of
the three employed
cameras, using even
exposure times.
Summary of Contents for VisiLine
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