Scanning manholes/vaults containing steam
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Scanning manholes/vaults containing steam
I would appreciate any input on experience that people have had with scanning down inside large manholes or vaults where there is a significant amount of steam present. We've done a little work using a special telescoping tripod that allows us to lower a scanner (inverted) down into an underground vault. That process worked well enough, but we've been requested to scan manholes at an industrial site where there are underground steam lines, and when some of those manhole lids are opened we see that the vault space appears to be full of steam. I am skeptical about lowering a scanner down into that environment, and would be interested to hear if any of you have tried such a thing and what the outcomes were. Thank you in advance! - Michael
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Re: Scanning manholes/vaults containing steam
Micheal,
Just a quick one from myself. I have done a lot of scanning around Steam now and it will appear as noise in the scan. I have also scanned manholes where steam is present. I use a Leica P40 and can tell you that whenever steam is present it just shows up as noise and makes the scan somewhat useless. In terms of damaging the equipment I would say you are fine as the gear is IP rated. However the data is hit and miss in terms of quality.
Good Luck with it.
Regards
Joe
Just a quick one from myself. I have done a lot of scanning around Steam now and it will appear as noise in the scan. I have also scanned manholes where steam is present. I use a Leica P40 and can tell you that whenever steam is present it just shows up as noise and makes the scan somewhat useless. In terms of damaging the equipment I would say you are fine as the gear is IP rated. However the data is hit and miss in terms of quality.
Good Luck with it.
Regards
Joe
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Re: Scanning manholes/vaults containing steam
Yeah steam is tough. I guess depending on the use-case and the amount of steam, you may still get some good data - but there will be a TON of noise.
Maybe bring a fan and do the best you can? Again it depends on if you need to see small objects which could be shadowed or if your just looking for general outline of piping walls, etc...
I think you'll have better luck with TOF vs Faro.
Maybe bring a fan and do the best you can? Again it depends on if you need to see small objects which could be shadowed or if your just looking for general outline of piping walls, etc...
I think you'll have better luck with TOF vs Faro.
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Re: Scanning manholes/vaults containing steam
PM me and we may have a good solution for you.
Cheers
Richard
Cheers
Richard
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Re: Scanning manholes/vaults containing steam
Here is a similar problem/solution on a much larger scale:tbwester wrote:Yeah steam is tough. I guess depending on the use-case and the amount of steam, you may still get some good data - but there will be a TON of noise.
Article:
There’s one big problem with satellite imagery, and a space startup has found a solution for it
https://qz.com/879270/theres-one-big-pr ... on-for-it/
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Re: Scanning manholes/vaults containing steam
Thank you all for your input; I appreciate it very much!
- Michael
- Michael
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Re: Scanning manholes/vaults containing steam
InfiPoints has extremely comprehensive noise reduction features. Would you be able to send me a sample scan or two that has noise in it to see if anything can be used?
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Re: Scanning manholes/vaults containing steam
Joe,GrasstecGeomatics wrote:Micheal,
Just a quick one from myself. I have done a lot of scanning around Steam now and it will appear as noise in the scan. I have also scanned manholes where steam is present. I use a Leica P40 and can tell you that whenever steam is present it just shows up as noise and makes the scan somewhat useless. In terms of damaging the equipment I would say you are fine as the gear is IP rated. However the data is hit and miss in terms of quality.
Good Luck with it.
Regards
Joe
What type of inverted tripod do you use for the P40?
We have a potential project coming up and I think this is the way to go.
Regards,
Gus
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Re: Scanning manholes/vaults containing steam
I've scanned with a tx5 in the same conditions and the resultst were useless. They had to shut down this part of the plant for half an hour so i could revisit.
I have no experience with other scanners for this problem
I have no experience with other scanners for this problem
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Re: Scanning manholes/vaults containing steam
Maybe there is a different time of day or air temp that would help to cut down on the amount of steam. We have had to wait to scan areas of sites after the air temp warmed up and burned off the steam quickly. This may not ever happen with manholes though.