How It Works
Augmented reality has been in use in a number of industries for decades. AR is
the technology behind the field markers that viewers see on TV during football
games, for example, but perhaps its most famous application is the popular
Pokémon Go game. In construction, AR typically relies on a mobile device, such
as a smartphone or tablet. For example, Trimble SiteVision is an AR system that
combines a smartphone with a lightweight, handheld integrated positioning
system. The system uses GNSS, the Global Navigation Satellite System
commonly known as GPS, to pinpoint the user's location, and a rangefinder to
allow measurement between remote points and the AR model. Using the
smartphone's built-in camera, the user is able to see the 3D model overlaid on
the physical surroundings and accurately located in context. This context is
important to understand precisely the interaction of the model with the
environment. Sensors pick up changes in the user's motion and point of view,
then the tool overlays the 3D model on the mobile device screen relative to
what the user is seeing.
AR Applications in Construction
Via a smartphone or tablet, AR projects a "digital window" that superimposes
a detailed BIM model, be it a building or a road, onto the user's physical
surroundings to help them visualize the placement of entire structures, as
well as specific design features, objects, or systems. AR is especially useful in
civil engineering and construction and for geospatial activities.
Augmented Reality
(AR)
Augmented reality combines the physical
& digital worlds by overlaying digital
information onto the user's actual
environment, typically via a mobile device.
