photogrammetry demo

14
Using Photogrammetry To Create 3-D As-built CAD Models

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Post on 04-Jun-2015

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photogrammetry

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Page 1: Photogrammetry Demo

Using Photogrammetry To Create 3-D As-built CAD Models

Page 2: Photogrammetry Demo

High resolution calibrated digital

camera

Reflectorless total station

Self adhesivesurvey targets

2 man team

Site mobilisation:

Page 3: Photogrammetry Demo
Page 4: Photogrammetry Demo

A control network is placed in prominent locations

This enables the total station to be moved anywhere within the scope

The working position is then calculated by the total station

Targets for the local photogrammetry survey can now be placed

Page 5: Photogrammetry Demo

Pairs of overlapping photographs are taken.

Page 6: Photogrammetry Demo

This process is repeated for the entire scope of work.

Page 7: Photogrammetry Demo

Photogrammetry on site:

can be highly accurate, up to ± 2mm. is highly portable can be non contact uses inexpensive equipment is a fast and efficient survey technique will capture all visible objects from multiple angles

ensuring complete coverage

can also be customised to suit special requirements

eg:- using in cell remote camerasreverse calibration of existing video

footage

Page 8: Photogrammetry Demo

The complete photographic survey is initially available as a visual database:

enables the ability to navigate, visualize and measure from survey coordinated high resolution photographs.

can be delivered within days of leaving survey uses a simple 3D model to navigate enables multiple viewpoints of same 3D point all 3D coordinates measured are with respect to

plant specific datum

Page 9: Photogrammetry Demo

The complete photographic survey is initially available as a visual database:

Benefits to Nuclear Industry:

eliminate unnecessary site visits – ALARP project staff based anywhere can take accurate

measurements from photographs provides accurate and irrefutable archive documentation enables virtual planning of hazardous engineering

operations check legacy documentation for accuracy define accurate scope for cost effective 3D modelling

Page 10: Photogrammetry Demo

3D CAD Modelling using the Visual Database

Page 11: Photogrammetry Demo

Corresponding points are digitised from left and right photographs

Page 12: Photogrammetry Demo
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3D CAD Model

Specification driven modelling

Delivered to any 3D CAD formatInc: AutoCAD, Inventor, Microstation, PDMS, Pro/E

Asset tag names can be added from P&IDs, PFDs

Built to customers requirements

Page 14: Photogrammetry Demo

Benefits :

Eliminate site visits - ALARP Suitable for all disciplines ±5mm general accuracy within 3D model Intelligent 3D models enable isometric/2D drawing

production, material take off, etc Use as a basis for all new design/demolition work Enable virtual simulation and enhanced risk assessment

of hazardous engineering operations

3D CAD Model