A new methodology to design multi-sensor networks for distributed large-volume metrology systems based on triangulation |
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| Affiliation: | 1. Former resident, Advanced Prosthodontics Program, Division of Restorative and Prosthetic Dentistry, The Ohio State University College of Dentistry, Columbus, Ohio;2. Clinical Assistant Professor, Division of General Practice and Material Science, The Ohio State University College of Dentistry, Columbus, Ohio;3. Former resident, Advanced Prosthodontics Program, Division of Restorative and Prosthetic Dentistry, The Ohio State University College of Dentistry, Columbus, Ohio;4. Program Director and Assistant Professor, Advanced Prosthodontics Program, Division of Restorative Science and Prosthodontic, The Ohio State University College of Dentistry, Columbus, Ohio;1. Beijing Key Laboratory of Optoelectronic Measurement Technology, Beijing Information Science & Technology University, Beijing, 100101, China;2. Bionic and Intelligent Equipment Lab, Beijing Information Science and Technology University, Beijing 100016, China;1. Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, María de Luna 3, E-50018 Zaragoza, Spain;2. Departamento de Física & I3N, Universidade de Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal;3. Dpto. De Física de la Materia Condensada, Facultad de Física, Universidad de Sevilla, Avenida de Reina Mercedes s/n, E-41012, Sevilla, Spain;1. AML, School of Aerospace, Tsinghua University, Beijing 100084, China;2. National Center for Nanoscience and Technology, Beijing 100190, China;3. LTCS, College of Engineering, Peking University, Beijing 100871, China |
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| Abstract: | Distributed Large-Volume Metrology (LVM) systems are mainly used for industrial applications concerning assembly and dimensional verification of large-sized objects. These systems generally consist of a set of network devices, distributed around the measurement volume, and some targets to be localized, in contact with the measured object's surface or mounted on a hand-held probe for measuring the points of interest. Target localization is carried out through several approaches, which use angular and/or distance measurements by network devices.This paper presents a new methodology to support the design of networks of devices, for distributed LVM systems based on triangulation (i.e., systems in which network devices perform angular measurements only). It is assumed that these systems use multi-sensor networks including two typologies of devices: some are accurate but expensive and other ones are less accurate but cheaper. The goal of the methodology is establishing a link between the following parameters: (i) density of network devices, (ii) mix between the two typologies of network devices, (iii) measurement uncertainty, and (iv) cost. The methodology allows to estimate the most appropriate density and mix between the two typologies of network devices, so that the distributed LVM system is conforming with the required measurement uncertainty and cost.The methodology relies on a large number of simulated experiments, defined and implemented using a dedicated routine; feasibility and practicality is tested by preliminary experiments on a multi-sensor photogrammetric system, developed at Politecnico di Torino—DIGEP. |
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| Keywords: | Large-volume metrology Distributed measuring system Multi-sensor network Triangulation Network design Network density |
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