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One of the services SeaMaster Holland provides is 3D scanning and modelling services. 3D scanning is a developing tool that is increasingly used in the maritime industry over the last decade. 3D scanning allows the user to get a very accurate “as build” of the scanned area. This information can be used for different purposes, such as:

  1. Installation of Ballast water treatment system in existing ship
  2. Installation of Scrubber in existing ship
  3. Visualisation of damage to ship structure
  4. Any alteration done to a ship structure or systems.

The quality of a scanning projects is as good as the quality of the scan and the engineering/ modelling work that is done on the point cloud. One of the major parts that determines the quality of the point cloud is the scanning device itself. Seamaster uses the latest models of Leica to ensure best resolution and most efficient scanning.

A scanning project typically follows steps as shown hereunder.

1. Formulation of a scan plan

When a customer requests a scan the first step is to get a good idea of what the purpose and scope of the scan is according to the client. If the area that has to be scanned cannot be visited, drawings of the area are requested. Based on the available information a scan plan will be formulized.

2. On board scanning

A team of at least 2 persons will go to the area that need to be scanned to perform the scans according to the scan plan. One person will be moving the scanner around the area and make sure the perspectives of each scan overlap sufficiently without too much “shadowing”. The second person operates the tablet from which the scanner is controlled . For a good scan result there needs to be as little as possible disturbance in the scan area during the scan.

3. Aligning of scans on the spot.

Even though the Leica scanning machines that SeaMaster uses work almost automatically (other scanners require much more labour intensive work to get the scans aligned properly), the scan team has to put each scan in the proper position to light up with the other scans of the same area from a different point of view.

4. Preliminary point cloud review and engineering/modelling plan

After the team has made enough scans too get the designated area covered, a preliminary point cloud can be viewed on the tablet. This information can be reviewed on the spot with the client to identify the completeness of the point cloud and to identify the area’s that need modelling/ engineering so to be able to make the necessary alterations/ adaptations/ assessments that are required.

IMPORTANT!: A misconception regarding 3D scanning is that the scanner does all the work and that what comes out of the scanner is a ready model that shows all you need. The point cloud is the raw data that has to be engineered into a workable 3D model. The actual scanning activity is in many cases only a small part of the total scope of the project.

5. Refining the Point Cloud

The point cloud will be “refined”; Alignment of different scans to fit as best as possible, eliminate obvious “pollution” etc……

6. Modelling and Engineering

According to the conversation with the client described in step 4 the point cloud will be turned into a workable, adaptable as build 3D model.

 

7. Manipulation of the as build model

After the point cloud has been engineered into an as build model, manipulations can be made such as:

Import ballast water systems

Import exhaust scrubber installation

Make any kind of changes to the environment

Repair damages

Etc……

 

This step has many variations and can get very elaborate depending on the involvement in the project.

Data processing

Development of 3D model as built

Integration of the modification in the 3D model

 

Complete 3D model as built

 

P&ID’s modifications

Field scans

 

Assembly check

 

Fabrication and mounting documentaion

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