What is the expected global accuracy of handheld scanners over larger distances?

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akeane
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What is the expected global accuracy of handheld scanners over larger distances?

Post by akeane »

I would like to include handheld scanning in our survey workflow for areas of poor access and poor line of sight.
I had someone the other day recommend to me the peel 3d, claiming he was obtaining 0.2mm accuracy; though im sure this was the manufacturer rated accuracy to a single point, rather than a global accuracy of all points.

I know many of you use the scanner for small parts, but how does it go for global accuracy? if i scanned a truck from one end to the other, will the distances between the corners be correct? does the accuracy improve with more passes? is there a general rule of thumb that can be applied here?

Does the proprietary software allow for control to be included to adjust and position the network rather than a rigid transformation? i could easily layout a few control points with our tracker then observe them again with a scanner.

I've had the peel3 3d recommended but I'm happy to hear other options. I have 0 experience with handheld beyond some youtube, so im unsure of their limitations.
3D4L
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Re: What is the expected global accuracy of handheld scanners over larger distances?

Post by 3D4L »

The nice thing about the Peel is it is $8k USD. So it's cheap. The bad news is you need to use targets to get usable data from it. Without targets the error stack up adds up quick. You will need to look at a spec sheet to see volumetric accuracy, but the lower priced handhelds lose accuracy quickly over long areas. You can tie the point cloud in after the scan is done in your BIM software. If you are used to tracker accuracy then you may not like the volumetric accuracy. That being said the scanner that is used in manner the most is the Artec Leo. It is 35k so not cheap but is the correct tool for this.
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