• TECHNICAL FACILITIES FOR ENSURING SECURITY

    INNOVATIVE INVESTIGATIONS OF THE CRIME SCENE USING 3D SCANNERS

    Security & Future, Vol. 2 (2018), Issue 1, pg(s) 39-42

    Innovative solutions that can be applied in contemporary forensic science, including the examination of the place of the incident or crime, are still being sought. One of them is the preservation of evidence by means of 3D scanners. In Europe, 3D scanners have got, among others, Police services of the following countries: Switzerland, Germany, France, Spain and Italy In the paper, the results of research on the preservation of the crime scene using 3D scanning techniques have been presented. The research used Creaform hand scanners, both laser and structural light, Smarttech3D portable 1.3MPix, a scanner on the measuring arm – FARO Laser ScanArm AND
    TERRESTIAL scanners (Faro, Leica, Z + F). The accuracy and precision of scanners were carried out on a certified measurement pattern. The obtained accuracy results for the tested scanners are within the accuracy range given by the manufacturers in the technical specifications of the devices. To examine the scanners’ resolution, an object with a complicated shape and many small elements was used. It was examined how the tested scanners behave when attempting to scan surfaces generally considered as hard to scan surfaces. Attempts have also been made to use a 3D structural light scanner to scan snow tracks. The possibilities of combining scans from a portable scanner (Go! SCAN50, Smarttech) and a scanner on a measuring arm (Faro), with scans obtained from long-range were examined. It has been found that it is possible to supplement clouds of points acquired in 3D scanning technology with photos from digital cameras, detailed scans of selected traces and precise geographical locations.

  • RAPID PROTOTYPING – DEFINITION OF TERMS AND HOW TO APPLY DURING A STUDENT PROJECT

    Machines. Technologies. Materials., Vol. 8 (2014), Issue 9, pg(s) 44-46

    Nowadays the field of Rapid Prototyping is rapidly changing and providing a clear overview is challenging. One of the biggest problems in this context is that different operations are often named similar. In the beginning of this paper the most important related terms are defined and classified. Afterwards the major Rapid Prototyping techniques, called generative manufacturing methods, are explained.

    Alternatives to these generative methods as well as 3D-scanning methods are dealt with too. All in all these emerging technologies around 3D-printing and 3D-scanning are revolutionizing the way Rapid Prototyping laboratories look like. They offer new possibilities and reduce the complexity of prototyping. One of the future trends is so called Fab Labs which are currently stretching the boundaries of the common Rapid Prototyping laboratories. At Graz University of Technology the second Fab Lab in Austria has been established lately. Especially its implementation in University education as part of the Product Innovation Project is discussed in detail.