Science > Physics > =?UTF-8?B?bW9pcsOp?= method to viualize deformations
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Science > Physics |
| User: |
"Dirk =?UTF-8?B?VsO2bGxnZXI=?=" |
| Date: |
27 Jan 2004 05:01:52 AM |
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=?UTF-8?B?bW9pcsOp?= method to viualize deformations |
Hello,
i am not sure if chose the right newsgroups, so if i am wrong, sorry for
that. I have got the following questions:
In order to visualize the deformations of a goose-wing (just a model) in a
wind tunnel, I wanted to use the Moiré-effect. That means, I wanted to
project a raster (?) on the wing and compare it with a reference raster
afterwards to determine the deformations on certain positions. Before
beginning this experiment in the expensive windtunnel, i wanted to
improvise a little bit to get experienced. I thought of using a projector
for colorslides to create the raster at the wing. I will install a
reference raster and save the reflected light with a digital camera, hoping
to be able to see the Moiré effect. Do you think that can work out or is it
necessary to have a more powerfull light (laser)? How can I analyse the
pictures? Is there any software available or do I have to write own
programs? I would be glad for any hints, critics or other proposials to
measure those deformations.
Thanks in advance!
dirk
--
www.uebergebuehr.de
.
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| User: "tadchem" |
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| Title: Re: moiré method to viualize deformations |
27 Jan 2004 07:50:31 AM |
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"Dirk Völlger" <dvoellger@gmx.de> wrote in message
news:bv5gf0$onvie$1@ID-83780.news.uni-berlin.de...
Hello,
i am not sure if chose the right newsgroups, so if i am wrong, sorry for
that. I have got the following questions:
In order to visualize the deformations of a goose-wing (just a model) in a
wind tunnel, I wanted to use the Moiré-effect. That means, I wanted to
project a raster (?) on the wing and compare it with a reference raster
afterwards to determine the deformations on certain positions.
Wie so?
http://www.photonics.com/dictionary/lookup/XQ/ASP/url.lookup/entrynum.4231/pu./letter.p/QX/lookup.htm
(illustriert Fig.6 und Fig. 7)
http://www.cs.cf.ac.uk/Dave/Vision_lecture/node12.html
Bitte lesen Sie die Nachrichten unter dieser Figuren.
Tom Davidson
Richmond, VA
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| User: "Tom Potter" |
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| Title: Re: moiré method to viualize deformations |
27 Jan 2004 06:14:18 AM |
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"Dirk Völlger" <dvoellger@gmx.de> wrote in message
news:bv5gf0$onvie$1@ID-83780.news.uni-berlin.de...
Hello,
i am not sure if chose the right newsgroups, so if i am wrong, sorry for
that. I have got the following questions:
In order to visualize the deformations of a goose-wing (just a model) in a
wind tunnel, I wanted to use the Moiré-effect. That means, I wanted to
project a raster (?) on the wing and compare it with a reference raster
afterwards to determine the deformations on certain positions. Before
beginning this experiment in the expensive windtunnel, i wanted to
improvise a little bit to get experienced. I thought of using a projector
for colorslides to create the raster at the wing. I will install a
reference raster and save the reflected light with a digital camera,
hoping
to be able to see the Moiré effect. Do you think that can work out or is
it
necessary to have a more powerfull light (laser)? How can I analyse the
pictures? Is there any software available or do I have to write own
programs? I would be glad for any hints, critics or other proposials to
measure those deformations.
Thanks in advance!
A Google search on
"photoelastic stress analysis",
might be of interest to you.
--
Tom Potter http://tompotter.us
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