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https://doi.org/10.21256/zhaw-30172| Publication type: | Conference paper |
| Type of review: | Peer review (abstract) |
| Title: | Computer vision method for analyzing the oscillation and displacement of specimens during mechanical shock tests |
| Authors: | Stähli, Patrick Brenner, Lorenz Zahnd, André Tillenkamp, Frank |
| et. al: | No |
| DOI: | 10.21256/zhaw-30172 |
| Conference details: | 26th Symposium of Military Aspects of Blast and Shock (MABS26), Wollongong, Australia, 3-8 December 2023 |
| Issue Date: | 2023 |
| Publisher / Ed. Institution: | ZHAW Zürcher Hochschule für Angewandte Wissenschaften |
| Publisher / Ed. Institution: | Winterthur |
| Language: | English |
| Subjects: | Civil protection; Ground shock; Computer vision; Specimen deflection |
| Subject (DDC): | 363: Environmental and security problems 620: Engineering |
| Abstract: | The Spiez Laboratory tests civil protection components of all types against ground shock on specific shock test facilities. Acceleration sensors and velocity measurements provide hereby information about the displacement by integrating the corresponding signal. Until now, only post-shock functional tests and visual controls are feasible to carry out a subsequent damage analysis. For this reason, a novel computer vision based method is developed in order to capture the whole horizontal shock process which allows the analysis of the specimen oscillation, its deflection as well as the detection of design vulnerabilities. As an initial task, the existing measurement data acquisition has been synchronized with the newly employed high speed camera system. Following, the latter has been positioned and calibrated in order to carry out first test measurements to register the displacement. Based on the obtained data, it has been decided to develop an individual solution with the help of the OpenCV library and point markers. Hereby, the main procedure is as follows: set up camera, calibrate camera, install test specimen, register camera images during the shock and evaluate camera images. One crucial task is the camera calibration. With the help of a specifically designed calibration target, it was achieved to correct any errors due to the camera optics as well as the perspective of the camera. Consequently, a method was elaborated to measure the displacements in the measuring plane independently of the camera position. Hereby, different software solutions were programmed for the calibration, measurement and evaluation. By experiments it was shown that the novel measuring system is functional with an accuracy of approximately ± 2 mm. |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/30172 |
| Fulltext version: | Published version |
| License (according to publishing contract): | Licence according to publishing contract |
| Departement: | School of Engineering |
| Organisational Unit: | Institute of Energy Systems and Fluid Engineering (IEFE) |
| Published as part of the ZHAW project: | Forschungszusammenarbeit im Bereich Bevölkerungsschutzrelevante Druckstossausbreitung |
| Appears in collections: | Publikationen School of Engineering |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| 2023_Staehli-etal_Computer-vision-method-mechanical-shock-tests.pdf | 901.27 kB | Adobe PDF |  View/Open |
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Stähli, P., Brenner, L., Zahnd, A., & Tillenkamp, F. (2023). Computer vision method for analyzing the oscillation and displacement of specimens during mechanical shock tests. 26th Symposium of Military Aspects of Blast and Shock (MABS26), Wollongong, Australia, 3-8 December 2023. https://doi.org/10.21256/zhaw-30172
Stähli, P. et al. (2023) ‘Computer vision method for analyzing the oscillation and displacement of specimens during mechanical shock tests’, in 26th Symposium of Military Aspects of Blast and Shock (MABS26), Wollongong, Australia, 3-8 December 2023. Winterthur: ZHAW Zürcher Hochschule für Angewandte Wissenschaften. Available at: https://doi.org/10.21256/zhaw-30172.
P. Stähli, L. Brenner, A. Zahnd, and F. Tillenkamp, “Computer vision method for analyzing the oscillation and displacement of specimens during mechanical shock tests,” in 26th Symposium of Military Aspects of Blast and Shock (MABS26), Wollongong, Australia, 3-8 December 2023, 2023. doi: 10.21256/zhaw-30172.
STÄHLI, Patrick, Lorenz BRENNER, André ZAHND und Frank TILLENKAMP, 2023. Computer vision method for analyzing the oscillation and displacement of specimens during mechanical shock tests. In: 26th Symposium of Military Aspects of Blast and Shock (MABS26), Wollongong, Australia, 3-8 December 2023. Conference paper. Winterthur: ZHAW Zürcher Hochschule für Angewandte Wissenschaften. 2023
Stähli, Patrick, Lorenz Brenner, André Zahnd, and Frank Tillenkamp. 2023. “Computer Vision Method for Analyzing the Oscillation and Displacement of Specimens during Mechanical Shock Tests.” Conference paper. In 26th Symposium of Military Aspects of Blast and Shock (MABS26), Wollongong, Australia, 3-8 December 2023. Winterthur: ZHAW Zürcher Hochschule für Angewandte Wissenschaften. https://doi.org/10.21256/zhaw-30172.
Stähli, Patrick, et al. “Computer Vision Method for Analyzing the Oscillation and Displacement of Specimens during Mechanical Shock Tests.” 26th Symposium of Military Aspects of Blast and Shock (MABS26), Wollongong, Australia, 3-8 December 2023, ZHAW Zürcher Hochschule für Angewandte Wissenschaften, 2023, https://doi.org/10.21256/zhaw-30172.
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