Viametris keeps innovating the world of indoor 3D scanning, introducing a new generation of the iMMS now called iMS 3D. With its brand new design, the mobile iMS 3D is easier to transport, install and set up. The iMS 3D also integrates new sensors including the Ellipse-A from SBG Systems.

Based on the SLAM technology, the iMS 3D is equipped with three LiDAR profilers, each taking 40,000 points per second. The main LiDAR provides the horizontal profile, which also contributes to the continuous calculation of the iMS 3D position in the building. The other two lateral LiDARs give vertical profiles, including of the ceiling. While the user walks, pushing the iMS 3D at normal speed, the 3D profile of the room appears on the screen since the system records 3D measurements of the same room. Being easy to manipulate, the iMS 3D makes it possible for one person to survey every corner of the building.

During the survey, the 360-degree camera takes a spherical picture every 2 meters for a full documentation of the building. This solution makes indoor surveying 10 times quicker than traditional methods that usually use distance meters. The iMS 3D delivers an ideal combination of point density, acquisition speed and accuracy for the building trade industry.

At the office, the user can then access a centimeter-level accuracy 3D survey as a point cloud and pictures by using the Viametris processing and browsing software. The user can import the point cloud in his or her favorite CAD software (Autodesk Revit, AutoCAD, MicroStation, Rhino, etc.) to easily produce 2D maps or 3D models. The point cloud can be colorized with the colors of the pictures taken during the survey, which greatly improves the environment understanding. Additionally, the user has access to contextual 360-degree pictures, making objects such as radiator, extinguisher or lights simple to distinguish and locate.

Already integrated in other Viametris ultraportable technologies, the Ellipse-A from SBG Systems was chosen for this new generation of iMMS. “We integrated an Ellipse-A in our 2D system and were very happy with the results,” says Jérôme Ninot, president of Viametris. “It was obvious to us that the Ellipse-A will be part of our new iMMS.” The Ellipse-A is used to correct the horizontal profile. While the user is pushing the iMS 3D through the rooms, factors such as unevenness, slopes and ramps, cables and door thresholds can cause some noise in the point cloud. The Ellipse-A keeps the point cloud clean by correcting the horizontal LiDAR data frames used in particular to build the trajectory. The Ellipse-A is a powerful miniature Attitude and Heading Reference Sensor (AHRS), which provides roll and pitch data accurate to 0.2 degrees at 200Hz.

Keeping LiDAR and camera data precisely synchronized can be difficult because the camera focal time is susceptible to vary. In mobile scanning, even a slight latency might cause an offset. For example, the picture will not be located on the right place inside the point cloud. Viametris decided to connect the camera and the three LiDARs to the Ellipse-A to ensure a highly accurate and repeatable synchronization.

SBG Systems will join Viametris in introducing the iMS 3D at INTERGEO 2015 next week in Stuttgart, Germany.