Tebodin Peters Engineering GmbH - Bilfinger...Bernd Bodeit ACHEMA 2015, Frankfurt am Main | 15 -19...

LaserscanningFrom planning-to the as-built modelBernd Bodeit

ACHEMA 2015, Frankfurt am Main | 15 -19 June 2015

Tebodin Peters Engineering GmbH

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1995 20152000 2005 2010

Tebodin Peters EngineeringFigures and location


21%Technicians

7%Administrative

staff

14%Draftsmen

38%Civil

21%Mechanical

30%Process,

Chemistry

11%Others

Headcount2014: ~400 FTEPerformance2014: ~ € 31 million

58%Graduate Engineers

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Duisburg

Performance Overview

▪ Plant Design & Project Management

▪ 3D-Plant Design with PDMS & PDS

▪ Process Engineering, Machine & Equipment planning:

▪ Civil Engineering: Structural Design

▪ Building Services (TGA)

▪ Laser scanning, Software Development

▪ Site Engineering & Inspections

Tebodin Peters Engineering GmbH page 3

▪ In a pumping station of a power plant, some pipelines are to be revamped.

▪ To support the new planning, the already existing 3D-model should be corrected to an as-built model.

▪ For that reason a laserscanmeasurement is taken.

Detail of the existing 3D-model

Sample task


Sample task


▪ The laserscan measurement

Volume: 2250m³No. Scans: 21Points total: 903.000.000Work at side: 1 dayHardware: Faro Focus3D

▪ Detail approx. 5m x 5m 4.5m

▪ Colorized point-cloud

▪ Overlaid models

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Our self-developed software for analyzing and rebuilding point-cloud data is designed to carry out complex calculations:

▪ Filtering and segmentation of thepoint-clouds

▪ Fully automatic recognition of cylinders, elbows and surfaces

▪ As-built analysis between 3D-models and point-clouds

Formats for export and import

Point-clouds:

� ASCII

� PTX

Analysis Software Neo3D


3D-objects:

� DXF, STP

� IGES, N3P (PDMS)

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▪ Elimination of the outliers and edge-refracted points

▪ The point-cloud data will bereduced by using the average value of a neighborhood of points on a surface. A constant distribution of the points is guaranteed

▪ By setting the filter size, the distance between points can be adjusted. Superfluous point-cloud data will be deleted.

Preparing the point-cloud data with Neo3D


The point-cloud data will be decreased from approx. 40 mio to approx. 300 thousand points/scan

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▪ After importing the 3D-model and the already filtered point-cloud data to Neo3D, the program will calculate the distance between each point and the corresponding surface.

▪ By setting tolerances we can decide which deviations will be documented in a reporting file.

Comparison of point-cloud data and 3D-model data with Neo3D


Detail: distance between points and surface

±0 -25mm -50mm+25mm+50mm

tolerance

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Comparison of point-cloud data and 3D-model data with Neo3D


Neo3D analyzes the given input and will split both the point-cloud data and the 3D-model data in two different groups

Point-cloud dataCheck of deviation from

surface

Points within the preset tolerance

Not-scanned objects with no points on the

surface

3D-model dataCheck of the surface

point density

Scanned objects with points on the

surface

Documentation of the position modifications in the resulting reportExport to a separate point-cloud file


surface

Documentation of the objects to be deleted in the result report

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The resulting report and the points with no corresponding surface can be integrated in the planning system

Reworking the 3D-model


Detail: Macro-assisted rework in PDMS

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3D-model is As-Built

Exported objects from the 3D-model

Check by engineer� Do I need the non-scanned objects or can I ignore them because of for example small pipe bore ?� Can I ignore the points out of the preset tolerance because I won’t need them (for example a ladder) ?

Scanned objects with points on the surface


surface


Points outside of the preset tolerance

Workflow


point-cloud data

YES

point-cloud dataCheck of deviation from surface

3D-model dataCheck of the surface point density

Comparison point-cloud data and 3D-model data with Neo3D

Neo3D writes the resulting report file:

� Position modifications of the measured objects

� Objects that should be deleted because they were not scanned

� All points with a surface deviation out of tolerance

Reworking the 3D-model� Execution of the position modifications� Deleting the non-scanned objects� Reconstruction of the missing objects

NO

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Laserscan Messpunkte

Further applications using the as-built analysis


Confirmation ofthe assembly

CAE Modell

Scanned objects with points on the surface


surface


Points outside of the preset tolerance

vs

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Karl-Räder-Straße 3-567069 Ludwigshafen, Germany

Phone +49 621 6506 0Fax +49 621 6506 245www.peters.bilfinger.com

Bernd BodeitManaging Director

[email protected]

Thank you for your attention.


Tebodin Peters Engineering GmbH - Bilfinger...Bernd Bodeit ACHEMA 2015, Frankfurt am Main | 15 -19...

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