Non-Contact Laser Scanning
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Optical discretisation of geometry
Simpact have been making effective use of 3D geometry capture tools and, more specifically, laser scanning for over a decade. We have this capability in-house and make use of this technology to generate a CAD model where it may not exist (ie. our customer only has a hand built prototype) or to support our modelling activities (such as correlating the deformed end state of a finite element model to crash test).
In 2005 we pioneered the application of 3D laser scanning for automotive safety development by combining our core skills in automotive safety with a newly acquired technology within our CAE Tools (see our NAFEMS publication ‘Laser Scanning of Test Setup Boosts the Value of Vehicle Safety Simulation’ in our Publications area)
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Laser scanning is useful for capturing the external surfaces of components with a great deal of accuracy (typically up to 50µm). As it operates on a line of sight principle, surfaces which are difficult to see cannot be captured and an alternative process such as one of those below is required.
We use a range of laser scanning hardware to suit the application ranging from close range (our in-house Konica Monolta Vi-9i) for accurate data capture to long range (FARO X360) for collecting large volume datasets at a moderate accuracy. We have used the FARO X360 for the 3D capture of complete railway carriages and human body geometry for ergonomic assesement (also detailed in our Publications area).
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For the generation of CAD geometry from the point clouds or STL data that results from laser scanning we make use of the industry standard Rapidform (now Geomagic) software which is capable of interpreting large volumetric point clouds and the rapid generation of surfaces.
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