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3D-Measurement of the Pipe Geometry with Geo-Sensors
Version: 2.4
Date: 17.08.2023
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Introduction
A new generation of pipe inspection cameras allow the operator to record the exact position, situation and the course of a pipeline directly during a standard survey: der camera crawler thus drives through the pipe whereas a built-in geo-sensor is recording the current coordinate position of the camera head in predefined short distance steps. The corresponding X-, Y- and Z-values then are sent directly to the computer, processed by WinCanVX and drawn by the VX modules Map und WinCan 3D.
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If either the hardware configuration or the the hardware itself is faulty, the measurement wizard will return a corresponding feed-back.
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It is crucial for a reliable calculation of the 3D pipeline network, that you have entered valid data into all the corresponding altitude/depth fields of the section and node category:
Pipe depth in the upstream manhole (from cover to pipe bottom) (SECTION.OBJ_FromNodeDepth)
Pipe bottom altitude (above sea level) in the upstream manhole (SECTION.OBJ_FromNodeInvert)
Pipe depth in the downstream manhole (from cover to pipe bottom) (SECTION.OBJ_ToNodeDepth)
Pipe bottom altitude (above sea level) in the downstream manhole (SECTION.OBJ_ToNodeInvert)
Manhole cover altitude above sea level (Z-Coordinate) (NODE.OBJ_Shape_WKT_Z)
Depth of the upstream/downstream manhole (from cover to bottom) (NODE.OBJ_DepthToInvert)
Bottom altitude above sea level of the upstream/downstream manhole (NODE.OBJ_NodeInvert)
The sketch below illustrates the meaning of these fields:
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Legend:
Green = values to be provided by engineers/water authorities
Brown = values to be measured by the operator or provided by engineers/water authorities
Blue = values to be measured by the operator
Red = values calculated by WinCanVX hitting the button Tools > Calculate Invert Levels
Running 3D measurement for main pipes
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Geometry and length of the section do never change during this process and are always based on the previously done 3D-measurement.
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Mind that both tools can only be applied to the currently selected section. |
Visualization in WinCan 3D:
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Select the command Map > load map to lay the DXF-plot below the pipeline network. Even if shown as two-dimensional surface it will help the end user to easily locate the inspected objects:
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Data export
The pipeline geometry can also be exported as DXF-file via the command File > DXF export:
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Altitude profile (2D)
Select the desired object (i.e. section) and hit the command View > show 2D profile to get a 2D-graphic of the altitude profile (based on the Z-coordinate):
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