High vibration environment

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Arctanx
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High vibration environment

Post by Arctanx » Fri Apr 20, 2018 6:03 am

I had a facility to scan and the GeoSLAM worked okay enough for what we were doing at the time. But for more detailed work in a high vibration environment, would a phase based scanner work better than TOF scanner?
The vibration is enough to make my robotic total station not be able to read if it's level or not via the digital levels.

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Re: High vibration environment

Post by stevenramsey » Fri Apr 20, 2018 9:26 am

Phase or TOF is an irrelevant question as both will move with the vibrations as much as your TPS. The question is will the end results be fit for purpose for the Scale and scope of the project.
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Arctanx
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Re: High vibration environment

Post by Arctanx » Fri Apr 20, 2018 1:59 pm

I'm a newbie when it comes to scanning. I was thinking that a phase based scanner would complete the scan at a faster rate and would be less affected by the vibration. So maybe a mobile scanner would be the better tool for the job in that case?

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Re: High vibration environment

Post by tbwester » Fri Apr 20, 2018 3:58 pm

Arctanx wrote:
Fri Apr 20, 2018 6:03 am
I had a facility to scan and the GeoSLAM worked okay enough for what we were doing at the time. But for more detailed work in a high vibration environment, would a phase based scanner work better than TOF scanner?
The vibration is enough to make my robotic total station not be able to read if it's level or not via the digital levels.
In my experience, using a p20 in high vibration areas has resulted in very good data. Surprisingly clean, even when the bubble is moving around during scanning. So long as its really vibrating and not tilting the scanner (making the scanner un-level one way or the other).

Not sure if the faro would be as good or not.

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Re: High vibration environment

Post by JeffT » Sun Apr 22, 2018 5:04 am

I have used many terrestrial scanners for this and I'll tell you what I know.

You need a Leica scanner. I use a P30.

I have worked several grain mills and in what they call the "Hammer Room" there are crazy vibrations. It's literally several giant hammers pulverizing wheat into flour. Giant hammers falling several times a second. Also there is a "Shaker Room" that is literally a bunch of large 8x8x12 ft things shaking the shit out of things, I assume refining flour or whatever. It shakes the entirety of everything. It will shake your head just being in there.

The catwalks you are on are vibrating like crazy. My workflow is: I get the internal level as close as I can and just scan. If I can get it within 1' (1 Minute) of level after 10 seconds of watching, I will scan. In the end the scans look sort of "striated", but the walls, floors and ceilings are perfectly flat as they should be. All the other features match up perfectly. That Leica compensator is not to be doubted, it is absolutely perfect as far as I have ever seen, and that is absolutely one of the best features of it. You never doubt it after you see it.

The white paper literature says it's accurate to 1.5 arcseconds, about the height of a soccer ball at a mile, or about the height of a dime at a mile and a half. If that Leica scanner set something at level, it is goddam level. If you can get that vibrating catwalk to level into a middle ground while you are standing on the sides of it, you can get good scans. It will compensate for up to 3' (THREE MINUTES) in any direction, even Z. And it will tell you if it exceeded it, and by how many lines. I believe the C-10 and P-20 have the same internal level and compensator. Seriously, it's literally amazing to me every time I see it work. And it always works.

I have done so many vibrating grain mills it's old hat by now.

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