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According to the current great interest
concerning large-scale metrology applications in many
different fields of manufacturing industry, technologies
and techniques for dimensional measurement have recently
shown a substantial improvement. Ease-of-use, logistic and
economic issues, as well as metrological performance are
assuming a more and more important role among system
requirements. This paper describes the architecture and the
working principles of a novel infrared (IR) optical-based
system, designed to perform low-cost and easy indoor
coordinate measurements of large-size objects. The system
consists of a distributed network-based layout, whose
modularity allows fitting differently sized and shaped
working volumes by adequately increasing the number of
sensing units. Differently from existing spatially distributed
metrological instruments, the remote sensor devices are
intended to provide embedded data elaboration capabilities,
in order to share the overall computational load. The overall
system functionalities, including distributed layout configuration,
network self-calibration, 3D point localization, and
measurement data elaboration, are discussed. A preliminary
metrological characterization of system performance, based
on experimental testing, is also presented
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