Date: Wed, 17 Mar 1999 07:09:54 -0800
From: "Hutsell, David D" <[EMAIL PROTECTED]>
In the past we have used high speed motion picture study this process. In the
mid 80's we attempted to use high speed video but because of high RF emission
the images were of poor quality. Today there are several techniques that could
be applied to this problem. If constant realtime analyzation is needed then a
high rate camera and frame capture card for a PC would be a way to go. Machine
vision software would be used to capture and analyze the images. If off line
analyzation is to be used a monochrome high speed recording system could be
utilized such as the MotionScope from Redlakes or Olympus and the MotionCorder
from Kodak.
Dave Hutsell
Lead, Still and Instrumentation Photography
425-393-7610/425-393-0201
fax Pager: 206-986-5213
[EMAIL PROTECTED]
> ----------
> From: Andrew Davidhazy[SMTP:[EMAIL PROTECTED]]
> Reply To: [EMAIL PROTECTED]
> Sent: Tuesday, March 16, 1999 6:23 PM
> To: [EMAIL PROTECTED]
> Cc: [EMAIL PROTECTED]
> Subject: What to use to photograph a welding arc?
>
> From: FRANCO <[EMAIL PROTECTED]>
> Subject: high speed imaging
>
> One of the objectives of our group is to develop ways to control the
> automated welding. Nowadays, we're trying to develop a system to control
> the welding quality by observing and analyzing the metal transfer that
> occurs during the welding ("GMAW of steel").
> To do that, we must get images from the arc welding. Some researchers has
> been obtaining images from the arc welding using different equipment's.
> But, it is not easy getting high quality images due to the arc high
> intensity of illumination and also the high droplet transfer frequency. The
> Drop frequency changes between 1000 and 3000/sec, that's why we need a
> camera that is capable of getting images with a frequency of 1000
> frames/sec or even higher. At the beginning we thought about getting a high
> monochromatic camera. And considering the arc high intensity of
> illumination, we would like to use a camera with high shutter speed (~0.1 ms).
> What would be the best camera in your opinion? What kind of illumination
> would be the best? We'd appreciate a lot if you could give us your opinion
> about this matter.
>
> Thank you for your help.
>
> Franco Micaroni Neto
> Mechanical engineering
>
