photogrammetry demo
DESCRIPTION
photogrammetryTRANSCRIPT
Using Photogrammetry To Create 3-D As-built CAD Models
High resolution calibrated digital
camera
Reflectorless total station
Self adhesivesurvey targets
2 man team
Site mobilisation:
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
Pairs of overlapping photographs are taken.
This process is repeated for the entire scope of work.
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
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
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
3D CAD Modelling using the Visual Database
Corresponding points are digitised from left and right photographs
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
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