Abstract
Explore3DM will be an online resource to explore the diverse interests behind three-dimensional measurement and three-dimensional metrology (3DM). The motivation has been the development of large-volume and portable 3D methods and systems for applications in manufacturing, an activity which has been growing for the past 40 years. However, the measurement spectrum in Explore3DM will be wider and include, for example, as-built process plant at the large-object end and X-Ray CT inspection at the small-object end. This wider spectrum will support cross-sector research at University College London (UCL) to transfer 3DM developments from one sector to another. Initially, Explore3DM will have a core directory incorporating systems manufacturers, service suppliers, research groups and disseminators of metrology knowledge. Mechanisms for solving end users’ measurement tasks will add to further growth of 3DM. The resource is intended to be free to use and the directory free to join at a basic level. Premium directory sponsorship by commercial companies is expected to provide revenue to sustain and develop the resource and support 3DM development. With regard to standards, LVM and PCM systems and techniques can be difficult to assess with a standardized approach because of the highly flexible ways they can be applied. However, some standards have been developed and there is scope for more, for example in the terminology used. A dictionary will be a component of Explore3DM’s future knowledge base. By presenting a first version in a centralized resource, standardized terminology will be encouraged.
Highlights
In the past 40 years, Large-Volume Metrology (LVM) and Portable Coordinate Measurement (PCM) have grown significantly with some hundreds of systems manufacturers and service providers in operation as a result
Technologies for portable 3D metrology have significant origins in photogrammetry and surveying, in its most accurate form known as geodesy
Industrial photogrammetry and surveying As these technologies are the origin of many 3D metrology solutions, it is not surprising that they have continuing relevance, for example in the as-built modeling of the complex pipework in process plants or deformation monitoring of a bridge as traffic flows across it
Summary
In the past 40 years, Large-Volume Metrology (LVM) and Portable Coordinate Measurement (PCM) have grown significantly with some hundreds of systems manufacturers and service providers in operation as a result. Photogrammetry has been further developed, for example in conjunction with projected patterns to create surface scanning systems [1] These older technologies have been complemented by more recent developments, such as the laser tracker [2] and articulated measurement arm [3]. Industrial photogrammetry and surveying As these technologies are the origin of many 3D metrology solutions, it is not surprising that they have continuing relevance, for example in the as-built modeling of the complex pipework in process plants or deformation monitoring of a bridge as traffic flows across it. CMMs—Coordinate Measuring Machines CMMs represent another older technology which maintains a strong manufacturing presence due to the high accuracies which they can deliver They define three fixed axes in space, typically offering measuring volumes which accommodate object lengths of a few meters and are normally located in controlled environments to maintain their high accuracy. 40 years on, the CMS delivers [15]: The annual Coordinate Metrology Society Conference (CMSC) held in the US
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