Articles | Volume 11, issue 1
https://doi.org/10.5194/jsss-11-171-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/jsss-11-171-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Regular research article
| 
16 Jun 2022
Regular research article |
| 16 Jun 2022
| 16 Jun 2022
Acceptance and reverification testing for industrial computed tomography – a simulative study on geometrical misalignments
Florian Wohlgemuth
Institute of Manufacturing Metrology (FMT), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Nägelsbachstraße 25, 91052 Erlangen, Germany
Institute of Manufacturing Metrology (FMT), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Nägelsbachstraße 25, 91052 Erlangen, Germany
Ingomar Schmidt
Werth Messtechnik GmbH, Siemensstraße 19, 35394 Gießen, Germany
Wolfgang Kimmig
Carl Zeiss Industrielle Messtechnik GmbH, Carl-Zeiss-Str. 22, 73447 Oberkochen, Germany
Karl Dietrich Imkamp
Carl Zeiss Industrielle Messtechnik GmbH, Carl-Zeiss-Str. 22, 73447 Oberkochen, Germany
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J. Sens. Sens. Syst., 11, 219–223, https://doi.org/10.5194/jsss-11-219-2022, https://doi.org/10.5194/jsss-11-219-2022, 2022
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Industrial X-ray computed tomography is a holistic measurement technique for dimensional metrology. However, the relatively long measurement time is a hindrance to its application. A possibility to reduce measurement times, the continuous scan mode, is characterized in this work. The question is how much the time reduction impacts the accuracy of the dimensional measurements. The core result of the paper is an estimate of the effect along with experimental proof that this estimate is reasonable.
Matthias Busch and Tino Hausotte
J. Sens. Sens. Syst., 12, 1–8, https://doi.org/10.5194/jsss-12-1-2023, https://doi.org/10.5194/jsss-12-1-2023, 2023
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The paper presents a specimen and evaluation method for interface structural resolution testing of X-ray computed tomography systems based on CT simulations. The geometry is oriented to the norms of image quality investigation. The evaluation is based on profile lines of the cross-sectional images that pass through the boreholes. All statements on resolution refer to the entire measurement chain and, thus, in addition to the reconstruction algorithm also to the surface determination method used.
Christian Orgeldinger, Florian Wohlgemuth, Andreas Michael Müller, and Tino Hausotte
J. Sens. Sens. Syst., 11, 219–223, https://doi.org/10.5194/jsss-11-219-2022, https://doi.org/10.5194/jsss-11-219-2022, 2022
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Industrial X-ray computed tomography is a holistic measurement technique for dimensional metrology. However, the relatively long measurement time is a hindrance to its application. A possibility to reduce measurement times, the continuous scan mode, is characterized in this work. The question is how much the time reduction impacts the accuracy of the dimensional measurements. The core result of the paper is an estimate of the effect along with experimental proof that this estimate is reasonable.
Martin Lerchen, Julien Schinn, and Tino Hausotte
J. Sens. Sens. Syst., 10, 247–259, https://doi.org/10.5194/jsss-10-247-2021, https://doi.org/10.5194/jsss-10-247-2021, 2021
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In order to contribute to a standardisation and process monitoring of additive manufacturing (AM) processes, a novel referencing approach was developed to improve the assessment of geometric manufacturing and measurement deviations. This is based on a referencing system integrated in the powder bed, which enables a shortening of the measuring loop. The position-stable quartz glass pipes enable more precise specification of lateral manufacturing and measurement deviations during AM.
Martin Lerchen, Jakob Hornung, Yu Zou, and Tino Hausotte
J. Sens. Sens. Syst., 10, 219–232, https://doi.org/10.5194/jsss-10-219-2021, https://doi.org/10.5194/jsss-10-219-2021, 2021
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The publication contributes to a uniform procedure for in-process measurement data acquisition in additive manufacturing, which is essential for a controlled correction of detected manufacturing deviations. The developed methodology is based on an analysis of the melt pool contours relative to a referencing system integrated in the powder bed. By recording the referenced melt pool and the shimmering contours after powder application, manufacturing deviations can be evaluated more accurately.
Yiting Wu, Elisa Wirthmann, Ute Klöpzig, and Tino Hausotte
J. Sens. Sens. Syst., 10, 171–177, https://doi.org/10.5194/jsss-10-171-2021, https://doi.org/10.5194/jsss-10-171-2021, 2021
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A new metrological atomic force microscope (MAFM) head design is shown. We investigated the MAFM head in the nanomeasuring machine (NMM-1) for different high-precision and large-scale traceable measurement tasks. Due to their integration, the MAFM head can benefit from the large measuring range, high-precision and traceability of the NMM-1 for efficient measurements on different samples. The presented results show the realised macroscale measurements with sub-nanometre resolution.
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J. Sens. Sens. Syst., 9, 157–165, https://doi.org/10.5194/jsss-9-157-2020, https://doi.org/10.5194/jsss-9-157-2020, 2020
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For the determination of the refractive index of the lubricant used in the sheet-bulk metal forming process, a lubricant thin-film thickness standard was developed which represents a continuous measuring range from 6 to 100 μm. To determine the refractive index, the thin-film thickness standard was measured with a coaxial interferometric measurement system in various thickness ranges. The results show changing optical properties with increasing layer thickness.
Andreas Michael Müller and Tino Hausotte
J. Sens. Sens. Syst., 9, 61–70, https://doi.org/10.5194/jsss-9-61-2020, https://doi.org/10.5194/jsss-9-61-2020, 2020
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The framework of the single point uncertainty presents a methodology to determine the local measurement uncertainty for a measurement setup. The targets of the investigation were spur (involute) steel gear wheels using a CMM in scanning mode in combination with a rotatory table, as well as a single scan of the complete gear profile without the use of a rotatory table, using the
free-form scanCMM functionality. Both methods were examined with respect to their obtained single point uncertainty.
Andreas Michael Müller, Dominik Schubert, Dietmar Drummer, and Tino Hausotte
J. Sens. Sens. Syst., 9, 51–60, https://doi.org/10.5194/jsss-9-51-2020, https://doi.org/10.5194/jsss-9-51-2020, 2020
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This paper aims to demonstrate the complete workflow of the determination of the local measurement uncertainty and its components (systematic and random measurement error) for a given measurement task. It was shown for an optical measurement setup in combination with an industrial X-ray computed tomography reference measurement system that different necessary colouring methods of polymer gear wheels have a measurable influence on the local distribution of the measurement uncertainty.
Andreas Michael Müller and Tino Hausotte
J. Sens. Sens. Syst., 7, 551–557, https://doi.org/10.5194/jsss-7-551-2018, https://doi.org/10.5194/jsss-7-551-2018, 2018
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Computed tomography measurements can be subject to specific image artefacts, which can be dependent on the effective rotation axis of the work piece during the scan. The presented approach is to combine several CT scans with different rotation axes of the work piece using a data fusion approach. To improve the fidelity of the result, surface points are weighted individually within the algorithm, dependent on the local surface quality of the measurement.
A. Loderer and T. Hausotte
J. Sens. Sens. Syst., 5, 1–8, https://doi.org/10.5194/jsss-5-1-2016, https://doi.org/10.5194/jsss-5-1-2016, 2016
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This article describes a new qualification concept for dimensional measurements on optical measuring systems, using the example of a prototypical multi-scale multi-sensor fringe projection system for production-related inspections of sheet-bulk metal-formed parts. A new concept is developed for determining the orientations and positions of the sensors' measuring ranges in a common coordinate system. The principle element of the concept is a newly developed flexible reference artefact.
A. Schuler, T. Hausotte, and Z. Sun
J. Sens. Sens. Syst., 4, 199–208, https://doi.org/10.5194/jsss-4-199-2015, https://doi.org/10.5194/jsss-4-199-2015, 2015
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Measurement tasks of modern micro- and nanometrology with decreasing structure sizes and rising aspect ratios require nanometre-resolving 3-D capable sensors. A 3-D probing system based on electrical interaction is presented which is operated on a nanopositioning system NMM-1. New 3-D measurement procedures for the probing system as well as for micrometrology measurement tasks in general are shown.
J. Berthold and D. Imkamp
J. Sens. Sens. Syst., 2, 1–7, https://doi.org/10.5194/jsss-2-1-2013, https://doi.org/10.5194/jsss-2-1-2013, 2013
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Short summary
Acceptance and reverification testing for industrial CT systems is described in different standards. The characterisation and testing of CT system performance are often achieved with test artefacts containing spheres. This simulative study characterises the influence of different geometrical error sources – or geometrical misalignments – on these sphere measurements.
Acceptance and reverification testing for industrial CT systems is described in different...
