Scanning down access hatches

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KernowScan
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Scanning down access hatches

Post by KernowScan » Tue Jan 09, 2018 3:43 pm

Looking for some advice on how feasible it is to scan down through a series of access hatches. I have seen other companies scan down open manhole lids so it must be possible. This is fairly similar in a lot of ways.

A local quarry has a series of bins that store road stone from 6mm up to 100mm. I think there are 10 bins in total. The bins that contain the larger stones have become damaged over the years and the quarry wants to assess the damage with a view to repairing. The bins have access hatches at the top. These hatches measure 600mm by 600mm. The bins are 7m deep and measure approximately 3m by 6m. I have seen the access hatches and they do resemble manhole covers and can be easily lifted. This is the only access to the bins and therefore the only way the bins can be inspected. Instead of sending someone into the bins to document the damage they are keen to get a point cloud surveyed. They want to avoid sending someone into the bins at all cost. We could then provide them with the CAD deliverables they require. Say internal elevations of the bins.

I would imagine a minimum of 3 scans per bin would suffice. So one just at the hatch opening to overlap data inside/outside of the bin. Then one 2m down and then one 5m down. This would obviously mean lowering the scanner down on some kind of inverted tower. Is there something out there that will do this job. Something that I can hire in? All help gratefully received. Thanks

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MarkL
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Re: Scanning down access hatches

Post by MarkL » Tue Jan 09, 2018 4:18 pm

http://www.laserscanning-america.com/2- ... y-adapter/

This tripod is great for inverted scanning. You can also reverse it to use it for above ceiling too. I’m sure there are many other answers to your situation, but this was what I used.

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SCCS RTC
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Re: Scanning down access hatches

Post by SCCS RTC » Wed Jan 10, 2018 8:03 am

You wont be able to invert a ScanStation C10 but you can with a p-series with the right invert shaft tripod.
Invert P20-1.jpg
Let me know if you need any help and support with doing this project?
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KernowScan
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Re: Scanning down access hatches

Post by KernowScan » Wed Jan 10, 2018 2:12 pm

Thanks Phil. Approximately how far below ground can I extend the scanner. I need to scan 4-5 metres below the opening. Thanks

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Re: Scanning down access hatches

Post by dan574 » Thu Jan 11, 2018 3:06 am

This tripod is the Nedo shaft tripod and comes with four 1 metre long extensions so you should be right.

http://www.nedo.com/index.pl?Lang=ENGLI ... ative.html have a look at the second tripod

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SCCS RTC
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Re: Scanning down access hatches

Post by SCCS RTC » Thu Jan 11, 2018 8:59 am

KernowScan wrote:
Wed Jan 10, 2018 2:12 pm
Thanks Phil. Approximately how far below ground can I extend the scanner. I need to scan 4-5 metres below the opening. Thanks
That should be fine. You can hire this from SCCS with the adapter and support with the project - https://www.sccssurvey.co.uk/industrial ... ripod.html

I'll give you a call today to discuss.
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