3D laser scanning
3D laser scanning captures spatial data by the use of laser light. The shape, position and spatial locations of objects are recorded by millions of points. The scanner’s ability to see everything in its line of sight and create a point cloud (a set of vertices in a 3D coordinate system, defined by X, Y, Z coordinates) has revolutionized spatial data collection.
Laser scanners send up to a million laser beams a second out from a mirror that rotates vertically at high speed; the main body of the scanner slowly rotates horizontally at the same time to obtain a full 360 degree scan of everything surrounding the scanner up to 120m way. The result is a "point cloud" with millions of points depicting the surveyed building and its surrounds in minute detail.
How we doing it?
- Agree on specification for laser scan and completed BIM model, including level of detail and scope of work
- Establish accurate quality checked control network
- 3D laser scan internally and externally
- Register scan clouds together and quality check accuracy
- Use quality checked point cloud to create the 3D intelligent BIM model using Autodesk Revit
- Create a range of deliverables from the completed BIM model
- Archive and maintain the BIM model and scan cloud for future additions or later project phases
Traditional surveying comparing with cutting edge technology
When we are surveying with traditional total station surveying methods we are actually measuring specified points on key features. Using this coordinates in Auto Cad we are designing DWG and latter on importing into REVIT and building our BIM. models from there.
Laser Scanners measure millions of points per second , millions of points across whole building/structure surfaces. Laser Scanner they just get everything, while total station measure what you want.
Sometimes it's quicker to use the old methods, rather than the laser scanner, the great advantage of scanning is its speed on site. You collect absolutely everything very quickly. While there will be blind spots as laser scanners work on line-of-sight you get most things.