According to the increasing interest in metrological systems for the dimensional
measurements of large-size objects in a wide range of industrial sectors, several
solutions based on different technologies, working principles, architectures, and
functionalities have recently been developed. Among all, the most flexible and easily
transportable solutions are those that have aroused most interest and have found greater
success. In order to address the needs of Large-Scale Metrology (LSM) applications, a
distributed flexible system based on a network of low-cost InfraRed (IR) sensors – the
Mobile Spatial coordinate Measuring System II (MScMS-II) – has been developed at the
Industrial Quality and Metrology Laboratory of Politecnico di Torino. This paper presents
a preliminary uncertainty assessment of the system referring to the measured point
coordinates in the 3D space, focusing on the sources of measurement uncertainty and the
related propagation laws. A preliminary metrological characterization of MScMS-II
architecture, experimentally evaluated through a system prototype, is also presented and
discussed.