By Fiorenzo Franceschini, Maurizio Galetto, Domenico Maisano, Luca Mastrogiacomo, Barbara Pralio
The box of large-scale dimensional metrology (LSM) offers with gadgets that experience linear dimensions starting from tens to hundreds and hundreds of meters. It has lately attracted loads of curiosity in lots of components of creation, together with the car, railway, and shipbuilding sectors.
Distributed Large-Scale Dimensional Metrology introduces a brand new paradigm during this box that reverses the classical metrological method: measuring structures which are transportable and will be simply moved round the position of the measured item, that is most advantageous to relocating the item itself.
Distributed Large-Scale Dimensional Metrology combines the ideas of dispensed structures and large-scale metrology on the program point. It specializes in the newest insights and demanding situations of this new iteration of structures from the viewpoint of the designers and builders. the most subject matters are:
- coverage of measuring area,
- sensors calibration,
- on-line diagnostics,
- probe administration, and
- analysis of metrological performance.
The basic descriptions of every subject are additional enriched via particular examples about the use of commercially to be had platforms or the advance of recent prototypes. this may be quite beneficial for pro practitioners resembling caliber engineers, production and improvement engineers, and procurement experts, yet Distributed Large-Scale Dimensional Metrology additionally has a wealth of data for academics.
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Additional info for Distributed Large-Scale Dimensional Metrology: New Insights
Example text
The distributed nature of the system makes handling easier and provides scalability for the coverage of the measuring area. For this reason, iGPSTM is more suitable for particular types of measurement, which cannot be carried out by conventional instruments, like Coordinate Measuring Machines (CMMs). For instance, some large-size objects can not be transferred to the measurement systems due to their dimensions or other logistic constraints. For the system operator, iGPSTM can potentially be considered as a faster and easier solution compared to conventional CMMs, theodolites or laser trackers.
As mentioned in Sect. 4, it could be helpful to think of a distributed system as a wireless network of sensors (Franceschini et al. 2009a). In general, a wireless network typically consists of a large number of nodes (equipped with sensing devices and transceivers) with a dense distribution, equipped with transceivers. Each device can communicate with other devices within its communication range. A wireless network is typically modelled as a graph, where each node represents a physical device. Two nodes are connected by an edge, if and only if they can directly communicate.
2003; Triggs et al. 2000). An additional component of network calibration is the ‘‘system scale’’, which is the absolute distance between two known points such as the length of a reference bar. iGPSTM provides a relatively rapid and semiautomated localisation procedure, requiring relatively few manual measurements (Akcan et al. 2006). For more information about the bundle adjustment and the system scaling procedures, see Chap. 5. Once the network calibration has been completed, the measurements can be performed using a portable handheld measurement probe , known as a V-bar.
