Difference between revisions of "Compare UniScan to MultiScan Measurements"

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==Can UniScan and MultiScan Result In Different Numbers?==
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== VTube-LASER UniScan Measurements==
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VTube-LASER UniScan measurements take one group of evenly spaced laser stripes along the profile of each straight cylinder.  These stripes each contain points. The method used with UniScan is similar to spray painting.<br><br>
  
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Yes – they can give different numbers for tube measurements. This is because UniScan and MultiScan cover different parts of the surface on the same straight. See the different sections below to understand why.
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===VTube-LASER UNISCAN - The Best Way to Calculate the Centerline===
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UniScan is the best way to get to a true centerline average - especially for deformed diameters in straights. The reason is because UniScan averages out the entire surface of the straight measured.<br><br>
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And when VTube-LASER operators use wide-scanning techniques, then there is no better way to get to the truth of the centerline placement.<br><br>
  
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<br><br>
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===Compared to Fork Probe Method===
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Methods that use fork proves take very limited data on the surface (like fork probes with two crossing infrared beams. Examples are the 6-axis tube probe systems from HEXAGON.
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===Compared to Silouette Method===
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Methods that use tube edge are "silouette" measuring centers. Examples are like the Eaton Leonard LASERVISION and the AICON TubeInspect system.  These systems only look at the edge of the diameter and cannot use that data to calculate the same data that VTube-LASER can in its Cylinder Fit window.
  
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==UniScan Measurements==
 
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UniScan measurements take one group of evenly spaced points over the entire straight. The method use to measure with UniScan is like spray painting.<br><br>
 
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UniScan is the best way to get to a true centerline average - especially for deformed diameters in straights. The reason is because UniScan averages out the entire surface of the straight measured.
 
 
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[[image:uniscan.png|500px]]
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[[image:uniscan.png|500px]]<br><br>
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[[image:uniscan_stripes.png|500px]]<br><br>
 
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MulitScan only measures near the tangents of a straight.  (The tangents are the locations on the straights where the straights and bends meet.)<br><br>
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MultiScan only measures near the tangents of a straight.  (The tangents are the locations on the straights where the straights and bends meet.)<br><br>
 
MultiScan measurements are usually reserved for straights that are bowed - like in brake lines with long straights.<br><br>
 
MultiScan measurements are usually reserved for straights that are bowed - like in brake lines with long straights.<br><br>
 
For those kinds of tubes it is often the case that MultiScan is the only way to solve for a centerline.  (UniScan would reject those kinds of straights using its default tolerances.)</td>
 
For those kinds of tubes it is often the case that MultiScan is the only way to solve for a centerline.  (UniScan would reject those kinds of straights using its default tolerances.)</td>
 
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[[image:multiscan.png|500px]]
 
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==MTA Measurements==
 
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MTA (Measured Tube Averaging), combined with UniScan measuring, is the the best type of measuring available in VTube-LASER. MTA allows you to measure multiple sides of the same tube, then average the results into a single final tube shape.<br><br>
 
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Read the details for MTA here: [[VTube-LASER MTA (Measured Tube Averaging)]]</td>
 
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[[image:MTA Banner.png|500px]]<br><br>
 
 
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Latest revision as of 22:12, 12 April 2019

Vtube-laser logo 1.96.png


Contents

Compare UniScan and MultiScan Measurements

Vtube-laser v2.7 screenshot.png


VTube-LASER UniScan Measurements

VTube-LASER UniScan measurements take one group of evenly spaced laser stripes along the profile of each straight cylinder. These stripes each contain points. The method used with UniScan is similar to spray painting.

VTube-LASER UNISCAN - The Best Way to Calculate the Centerline

UniScan is the best way to get to a true centerline average - especially for deformed diameters in straights. The reason is because UniScan averages out the entire surface of the straight measured.

And when VTube-LASER operators use wide-scanning techniques, then there is no better way to get to the truth of the centerline placement.

Compared to Fork Probe Method

Methods that use fork proves take very limited data on the surface (like fork probes with two crossing infrared beams. Examples are the 6-axis tube probe systems from HEXAGON.

Compared to Silouette Method

Methods that use tube edge are "silouette" measuring centers. Examples are like the Eaton Leonard LASERVISION and the AICON TubeInspect system. These systems only look at the edge of the diameter and cannot use that data to calculate the same data that VTube-LASER can in its Cylinder Fit window.


Uniscan.png

Uniscan stripes.png



MultiScan Measurements

MultiScan only measures near the tangents of a straight. (The tangents are the locations on the straights where the straights and bends meet.)

MultiScan measurements are usually reserved for straights that are bowed - like in brake lines with long straights.

For those kinds of tubes it is often the case that MultiScan is the only way to solve for a centerline. (UniScan would reject those kinds of straights using its default tolerances.)

Multiscan.png



Other Pages

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