Step-height measurements on sand surfaces: A comparison between optical scanner and coordinate measuring machine

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedings – Annual report year: 2016Researchpeer-review

Standard

Step-height measurements on sand surfaces: A comparison between optical scanner and coordinate measuring machine. / Mohaghegh, Kamran; Yazdanbakhsh, Seyed Alireza; Tiedje, Niels Skat; De Chiffre, Leonardo.

Proceedings of euspen’s 16th International Conference & Exhibition,. 2016.

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedings – Annual report year: 2016Researchpeer-review

Harvard

Mohaghegh, K, Yazdanbakhsh, SA, Tiedje, NS & De Chiffre, L 2016, Step-height measurements on sand surfaces: A comparison between optical scanner and coordinate measuring machine. in Proceedings of euspen’s 16th International Conference & Exhibition,. euspen’s 16th International Conference & Exhibition, Nottingham, United Kingdom, 30/05/2016.

APA

CBE

Mohaghegh K, Yazdanbakhsh SA, Tiedje NS, De Chiffre L. 2016. Step-height measurements on sand surfaces: A comparison between optical scanner and coordinate measuring machine. In Proceedings of euspen’s 16th International Conference & Exhibition,.

MLA

Vancouver

Mohaghegh K, Yazdanbakhsh SA, Tiedje NS, De Chiffre L. Step-height measurements on sand surfaces: A comparison between optical scanner and coordinate measuring machine. In Proceedings of euspen’s 16th International Conference & Exhibition,. 2016

Author

Bibtex

@inproceedings{cde00595ebcc4888969e985f7a47314f,
title = "Step-height measurements on sand surfaces: A comparison between optical scanner and coordinate measuring machine",
abstract = "As with other manufacturing processes, modern casting is aiming at higher precision. To this, traceable measurements on sand moulds have become necessary. Optical 3D scanning offers a high degree of flexibility but suffers from lack of traceability, in particular when the object is sand. In this work step-heights ranging from 0.1 mm to 5.0 mm were made on 6 customised sand samples with an average grain size of 230 µm, produced using a hard binder that can be scanned both by tactile and optical probes. The step-heights were measured using a CMM with {\o}8 mm tactile probe. An optical 3D scanner based on triangulation principle using fringe projection was also used to measure the step heights resulting in a point cloud for each scanning. A similar measurement procedure with scanner was made using the scanners software to simulate a ball probe with the same size of CMM probe and following the same routine to touch the different positions on the polygonised mesh. Each measurement was repeated 5 times. The results of step height measurements on sand surfaces showed a maximum error of ± 12 µm for CMM, while scanner shows only ± 4 µm. Generally speaking, optical step height values were measured up to 27 µm larger than CMM measurements. A conclusion from this investigation is that CMM cannot be used to ensure traceability of optical measurements on this type of surface.",
keywords = "Metrology, Traceability, Optical 3D scanning, Sand",
author = "Kamran Mohaghegh and Yazdanbakhsh, {Seyed Alireza} and Tiedje, {Niels Skat} and {De Chiffre}, Leonardo",
note = "euspen’s 16th International Conference, Nottingham",
year = "2016",
language = "English",
booktitle = "Proceedings of euspen’s 16th International Conference & Exhibition,",

}

RIS

TY - GEN

T1 - Step-height measurements on sand surfaces: A comparison between optical scanner and coordinate measuring machine

AU - Mohaghegh, Kamran

AU - Yazdanbakhsh, Seyed Alireza

AU - Tiedje, Niels Skat

AU - De Chiffre, Leonardo

N1 - euspen’s 16th International Conference, Nottingham

PY - 2016

Y1 - 2016

N2 - As with other manufacturing processes, modern casting is aiming at higher precision. To this, traceable measurements on sand moulds have become necessary. Optical 3D scanning offers a high degree of flexibility but suffers from lack of traceability, in particular when the object is sand. In this work step-heights ranging from 0.1 mm to 5.0 mm were made on 6 customised sand samples with an average grain size of 230 µm, produced using a hard binder that can be scanned both by tactile and optical probes. The step-heights were measured using a CMM with ø8 mm tactile probe. An optical 3D scanner based on triangulation principle using fringe projection was also used to measure the step heights resulting in a point cloud for each scanning. A similar measurement procedure with scanner was made using the scanners software to simulate a ball probe with the same size of CMM probe and following the same routine to touch the different positions on the polygonised mesh. Each measurement was repeated 5 times. The results of step height measurements on sand surfaces showed a maximum error of ± 12 µm for CMM, while scanner shows only ± 4 µm. Generally speaking, optical step height values were measured up to 27 µm larger than CMM measurements. A conclusion from this investigation is that CMM cannot be used to ensure traceability of optical measurements on this type of surface.

AB - As with other manufacturing processes, modern casting is aiming at higher precision. To this, traceable measurements on sand moulds have become necessary. Optical 3D scanning offers a high degree of flexibility but suffers from lack of traceability, in particular when the object is sand. In this work step-heights ranging from 0.1 mm to 5.0 mm were made on 6 customised sand samples with an average grain size of 230 µm, produced using a hard binder that can be scanned both by tactile and optical probes. The step-heights were measured using a CMM with ø8 mm tactile probe. An optical 3D scanner based on triangulation principle using fringe projection was also used to measure the step heights resulting in a point cloud for each scanning. A similar measurement procedure with scanner was made using the scanners software to simulate a ball probe with the same size of CMM probe and following the same routine to touch the different positions on the polygonised mesh. Each measurement was repeated 5 times. The results of step height measurements on sand surfaces showed a maximum error of ± 12 µm for CMM, while scanner shows only ± 4 µm. Generally speaking, optical step height values were measured up to 27 µm larger than CMM measurements. A conclusion from this investigation is that CMM cannot be used to ensure traceability of optical measurements on this type of surface.

KW - Metrology

KW - Traceability

KW - Optical 3D scanning

KW - Sand

M3 - Article in proceedings

BT - Proceedings of euspen’s 16th International Conference & Exhibition,

ER -