Le 03/04/2012 12:38, Antoine Villeret a écrit :
the framerate is not limited by the rj45 extender but by the camera
itself (in my case)
and i think the bandwidth of the extender is wide enough to transfer
120 fps @ 640x480
and you often can reduce the scan area of industrial camera sensor to
increase framerate
for example a 640x480 sensor which outputs 90 fps can outputs 180 fps
@ 320x240
Yep, thanx for this precision Antoine.
What is the category of the cable you use for the connection between the
two RJ45 extender ?
Your config is like that ? :
camera <=> Firewire 400 cable <=> RJ45 extender <=> CAT6 cable <=> RJ45
extender <=> Firewire 400 cable <=> computer
or :
camera <=> Firewire 400 cable <=> RJ45 extender <=> CAT6 cable <=> computer
++
Jack
++
a
Le 3 avril 2012 11:34, Jack <j...@rybn.org <mailto:j...@rybn.org>> a
écrit :
Le 02/04/2012 09:48, Antoine Villeret a écrit :
hi,
i got 60 fps in 640x480 / grayscale which is the default image
configuration and the more bandwith expensive for this camera
++
a
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Le 1 avril 2012 15:42, Jack <j...@rybn.org
<mailto:j...@rybn.org>> a écrit :
Le 01/04/2012 14:18, Antoine Villeret a écrit :
hi jack,
i'm using a firewire 400 over RJ45 extender (from AVT) on a
tour with an AVT Guppy
it's work fine with 50m cable, it should work at least until
100m but i never tried
it's not possible to use switch to increase the distance
with this kind of extender
you can use certain switches with GigE but it increases
latency i think
another solution for very long distance (more than 100m) is
the optical fiber
you can find some firewire over optical fiber extender
Basler made a technical report on industrial cameras
interface here :
http://www.i2s-vision.fr/upload/BAS1108_Interfaces.pdf
hope this helps
++
a.
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Le 1 avril 2012 13:56, Jack <j...@rybn.org
<mailto:j...@rybn.org>> a écrit :
Le 01/04/2012 02:22, Max a écrit :
Am 01.04.2012 um 01:53 schrieb Jack:
PS : does anybody tried an other solution (like
GigE or USB<->Ethernet<->USB) with Gem when you
need long distance between camera and computer ?
Is it very stable ?
I could offer vnc access to a os x or ubuntu machine
hooked up to either a Allied Vision Tech GigE or
Firewire 800 camera.
m.
Hello Max,
Did you ever tried that solution ?
Is it appropriate to detect very small movement and is
it enough fast to be used in real time (not to much
latency ?) ?
++
Jack
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Hello Antoine,
Thanx to share your configuration and the Basler technical
report, it is a useful document.
What is the resolution the framerate you get on your computer
from your camera with that configuration ?
++
Jack
OK. I would prefer a camera with 640x480 pixels at 120 fps minimum
to be more precise in the detection of very small movements.
++
Jack
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