Le 03/04/2012 20:17, Jack a écrit :
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
yes
or :
camera <=> Firewire 400 cable <=> RJ45 extender <=> CAT6 cable <=> computer
no, the extender does not convert the FW protocol to ethernet protocol.
it just convert the FW electrical characteristic in order to send FW on a
eternet cable. Fut it's still FW, so you can't connect this cable on a regular
eternet plug.
++c
++
Jack
++
a
Le 3 avril 2012 11:34, Jack <[email protected] <mailto:[email protected]>> 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 <[email protected] <mailto:[email protected]>> 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 <[email protected] <mailto:[email protected]>> 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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