A new 3D scanning process that takes 3D scanning underwater

3D scanners are a very useful tool when you want to create a new 3D model of an already existing physical object. 3D scanners that you can currently find on the market today are very efficient and accurate, but when dealing with parts that have a complex geometric shape or hidden pieces, even the best performing machines have their limits.

It is for this reason that a team of researchers from Tel-Aviv University, Shandong University, Ben-Gurion University and the University of British Columbia has come together to develop a new 3D acquisition approach based on Archimedes principle of fluid displacement. This new technique consists of submerging solid objects into the water, which enables the scanner to pick up on all the parts of the piece no matter how well hidden.

Researchers are hoping their 3D scanner will help provide better results than typical 3D scanners

In order to scan the object, a mechanical arm plunges it several times into a tank of water. The repetition of this process and the use of sensors in the tank make it possible to measure the volume and the displacement of the water around the object. To obtain the 3D model, the arm changes the dive-axis and repeats the process over and over. By repeatedly plunging the arm into the water on a different axis, the 3D acquisition is more accurate and can pick up on geometries of the object that would have been hidden by a laser or other 3D scanners.