PSI - Issue 17
Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com ScienceDirect
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Procedia Structural Integrity 17 (2019) 828–834
ICSI 2019 The 3rd International Conference on Structural Integrity Development of LED-based illumination system for high-speed digital image correlation Pedro J. Sousa a,b,* , Fernando Carneiro b , N. Viriato Ramos b , Paulo J. Tavares b , Pedro M. G. P. Moreira b a Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal b INEGI – Institute of Science and Innovation in Mechanical and Industrial Engineering, Rua Dr. Roberto Frias, 400, 4200-465 Porto, Portugal ICSI 2019 The 3rd International Conference on Structural Integrity Development of LED-based illumination system for high-speed digital image correlation Pedro J. Sousa a,b,* , Fernando Carneiro b , N. Viriato Ramos b , Paulo J. Tavares b , Pedro M. G. P. Moreira b a Faculty of E gineeri g, University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto Portugal b INEGI – Institute of Science and Innovation in Mechanical and Industrial Engineering, Rua Dr. Roberto Frias, 400, 4200-465 Porto, Portugal The present work describes the design and development of a dedicated illumination system for application to high-speed digital image correlation. This type of application requires image acquisition to be performed with very short shutter times. This means that there is less time to integrate the incoming light and, as such, it is necessary to have significant light flux to acquire quality images. As such, illumination is usually the major concern in such high-speed imaging applications. The developed system uses a strobing high-power LED light source to tackle this issue, and illuminate the specimen with a large light flux during a very short period. This reduces the amount of heat that the specimen receives from the lighting source and has the advantage of enabling the use of cameras that would otherwise be unable to use such short shutter times effectively. In this paper, the whole design of the device is described. From the control electronics to the mechanical design, including the optical design of an appropriate reflector. The present work describes the design and development of a dedicated illumination system for application to high-speed digital image correlation. This type of application requires image acq isition to be performed with very short shutter times. This means that there is less time to integrate the incoming light and, as s , it is nec ssary to have significant light flux to acquire quality images. As such, illu ination is usually the major concern in such high-speed imaging applications. The developed system uses a strobing igh-power LED light s urce to t ckl this issue, and illuminate the specimen with a large light flux during a very short period. This reduces the amount of heat that the specimen receives from the lighting source and has the advantage of enabling the use of cameras that would otherwise b unable to use such short shutter times effectively. In this paper, the whole design of the device is described. From the control electronics to the mechanical design, including the optical design of an appropriate reflector. Abstract Abstract
© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers. Keywords: Digital Image Correlation, Structural Integrity, LED light source, Keywords: Digital Image Correlation, Structural Integrity, LED light source,
* Corresponding author. E-mail address: psousa@inegi.up.pt * Correspon ing auth r. E-mail address: psousa@inegi.up.pt
2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers.
2452-3216 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the ICSI 2019 organizers. 10.1016/j.prostr.2019.08.110
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