Large-scale dimensional metrology (LSDM): from tapes and theodolites to multi-sensor systems

Franceschini, Fiorenzo; Galetto, Maurizio; Maisano, Domenico Augusto Francesco; Mastrogiacomo, Luca

doi:10.1007/s12541-014-0527-2

Cited by 75 publications

(27 citation statements)

References 93 publications

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“…It is now possible to reconstruct component's geometry due to the advancements in metrology data acquisition and digitization techniques [12]. 3D reconstruction is widely used for large scale buildings and cultural heritage, by means of photogrammetry methods that produce significant improvements in accuracy and scalability.…”

Section: Data Acquisition Through 3d Reconstructionmentioning

confidence: 99%

Low cost three-dimensional virtual model construction for remanufacturing industry

et al. 2018

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Remanufactured products can save up to 80% of production and energy costs whilst generating lower CO 2 emissions. The key success factors for remanufacturing are quality, lead-time and cost. Extensive work within the industry and the detailed analysis of the remanufacturing process has shown that component inspection has significant bearing on overall productivity. Remanufacturing lacks automation because activities are predominantly manual. Automation of remanufacturing process will not only decrease the number of non-remanufacturable components, through decreasing cost and increasing consistency in quality, but also attract industries to design for remanufacture. A digital model of the component is required to automate the disassembly process and move towards industry 4.0 and cyber physical systems. There are several expensive techniques to create a digital model, which are not feasible for the remanufacturing industry. The research paper aims to check feasibility of using Visual Structure for Motion (VFM), a relatively low cost method, to develop a 3D digital model, for automation of the automotive engine (in as received condition) disassembly process using industrial robots. These experiments assess the scientific feasibility of using Videogrammetry to acquire pre-disassembly 3D model of the engine. Multiple 2D images were acquired and processed to find matching common features. The location of the camera was calculated through the matching features, producing a three-dimensional digital representation of the captured volume. A sparse point cloud was initially created and was then converted into a dense 3D point cloud. The 3D point cloud was converted into a meshed model. 2D images were stitched together to create a virtual model of the engine with surface texture and colour. Small features were clearly visible in the 3D model.

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Section: Data Acquisition Through 3d Reconstructionmentioning

confidence: 99%

Low cost three-dimensional virtual model construction for remanufacturing industry

et al. 2018

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“…The same is also true for other tasks, such as automated drilling [2] or welding [3], where accurate positioning is critical. Inspections of large parts (e.g., on the order of meters), such as wind turbine blades [4] or components of an airplane [5][6][7], are frequently performed by sensors mounted on a robot arm [8,9], but the required tolerances are submillimeter. Due to the size of the scanned parts, multiple scans from different viewpoints are often required.…”

Section: Introductionmentioning

confidence: 99%

Improving 3D vision-robot registration for assembly tasks

Franaszek¹,

Cheok²,

Wyk³

et al. 2020

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Good registration between the coordinate frames of a perception system and a robot is important for the efficient operation of autonomous systems in vision-guided assembly lines. Rigid-body registration, which is based on the measurement of corresponding points (fiducials) in both frames, is a commonly used method. Noise and possible bias in the measured points degrade the quality of registration as gauged by the Target Registration Error (TRE). A method to restore the rigid body condition (RRBC) was recently developed to reduce TRE when the bias is larger than the noise. This was achieved by applying corrections to target locations in the vision sensor frame. This paper presents two procedures to improve the performance of the RRBC method by: 1) selecting the location of fiducials used for calculating correction to the target location and 2) selecting the correct arm configuration for fiducial from multiple configurations as calculated by inverse kinematics. Experiments performed with a motion tracking system and two different robot arms show that these two procedures can further reduce the Root Mean Square of TRE (RMST) to less than 20 % of the uncorrected RMST.

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“…Dimensional inspection of large-sized objects are extensively involved in multiple stages in automotive industries, from design and prototyping up to in-line inspection supporting final assembly (Paul G Maropoulos et al 2008, Jafar Jamshidi et al 2010, Fiorenzo Franceschini et al 2014. Traditional Cartesian CMM (e.g.…”

Section: Introductionmentioning

confidence: 99%

Measurement strategy impact on dimensional inspection by portable camera-based measuring systems

Bai

Jamshidi

Kiraci

et al. 2017

Precision Engineering

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In dimensional inspection of large objects, portable measuring systems are greatly involved in a wealth of applications, such as automotive, motorsports and aerospace industries. Metris K-series Optical CMM (Coordinate Measuring Machine) system is one of the metrology solutions with relatively high accuracy and flexibility. This paper focuses on measurement strategy via repeatedly measuring a length using Metris K610 camera system. The paper proposes a link between measurement strategy and the system performance that can be achieved. The result of the statistical analysis are also given based on the uncertainty propagation of the CMM.

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Large-scale dimensional metrology (LSDM): from tapes and theodolites to multi-sensor systems

Cited by 75 publications

References 93 publications

Low cost three-dimensional virtual model construction for remanufacturing industry

Low cost three-dimensional virtual model construction for remanufacturing industry

Improving 3D vision-robot registration for assembly tasks

Measurement strategy impact on dimensional inspection by portable camera-based measuring systems

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