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Real-Time Life Cycle Assessment in the Production of Composite Structures using Visual Recognition

Schachinger, Andreas and Al-Lami, Ali (2018) Real-Time Life Cycle Assessment in the Production of Composite Structures using Visual Recognition. DLR-Interner Bericht. DLR-IB-FA-BS-2018-171. Master's. 58 S.

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Increasing use of carbon fiber reinforced polymer (CFRP) structures in the aerospace industry demands efficient manufacturing methods. Therefore, life-cycle assessment (LCA) and life-cycle cost analysis (LCCA) are valuable tools to examine associated carbon footprint and direct cost. However, due to the dominating proportion of manual work in manufacturing of aerospace CFRP structures, acquisition of relevant manufacturing data is a tedious process. In this work a new system within the concept of smart-work-station (SWS) is introduced, which uses sensor fusion to automatically track process steps during preforming of CFRP structures. Therefore, the work surface of a workstation is equipped with digital scales while cameras are installed to provide a top view. Elementary flows measurement is initiated by a change of weight at the scales. Combined with visual recognition these activities are recognized and recorded as events. The gathered data is fed to the ecoefficiency assessment model (EEAM) to allow process analysis in real-time. Items used are either identified via quick response (QR)-codes or an object detection system. Therefore, a convolutional neural network (CNN) was trained to recognize tools and ancillaries common for preforming of CFRP structures using transfer learning. The system has a modular design that allows customizable workstation configurations within the SWS concept. Several workstations can be connected to a central database. This approach enables deployment at the whole shop-floor level of a CFRP manufacturing facility. It is concluded that real-time LCA is an advantageous tool to improve CFRP manufacturing processes. Broadcasting LCA results to the shop-floor helps to raise awareness for a more efficient use of resources. Ecological and economic benefits as well as insights for different processes support decision makers towards sustainable direct applications

Item URL in elib:https://elib.dlr.de/126133/
Document Type:Monograph (DLR-Interner Bericht, Master's)
Title:Real-Time Life Cycle Assessment in the Production of Composite Structures using Visual Recognition
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Schachinger, AndreasFH Joanneum Ges. mbHUNSPECIFIED
Al-Lami, Aliali.al-lami (at) dlr.dehttps://orcid.org/0000-0003-4176-5547
Date:September 2018
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Number of Pages:58
Keywords:Fiber reinforced polymer (FRP); Smart-Work-Station (SWS); Life-Cycle Assessment (LCA); Life-Cycle Cost Analysis (LCCA)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment, R - no assignment, V - no assignment
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Composite Technology
Deposited By: Böhringer-Thelen, Isolde
Deposited On:04 Feb 2019 07:32
Last Modified:08 May 2019 10:52

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