TY - JOUR A1 - Weiland, Josef A1 - Kunze, Billy A1 - Luber, Michael A1 - Krüger, Naomi A1 - Schiebahn, Alexander A1 - Engelbrecht, Rainer A1 - Reisgen, Uwe T1 - Structural Health Monitoring of Adhesively Bonded Pipe-to-Socket Joints by Integration of Polymer Optical Fibers and Their Load-Dependent Transmission Properties JF - Sensors N2 - Adhesively bonded pipe-to-socket joints are used in numerous industrial applications. One example is in the transport of media, e.g., in the gas industry or in structural joints for such sectors as construction, wind energy, and the vehicle industry. To monitor such load-transmitting bonded joints, this study investigates a method based on the integration of polymer optical fibers into the adhesive layer. Previous methods for monitoring the condition of pipes, such as acoustic or ultrasonic methods or the use of glass fiber optic-based sensors (FBG or OTDR), are very complex in methodology and require cost-intensive (opto-) electronic devices to generate and evaluate the sensor signals; they are therefore unsuitable for large-scale use. The method investigated in this paper is based on the measurement of integral optical transmission with a simple photodiode under increasing mechanical stress. When tried at coupon level (single-lap joint), the light coupling was varied to obtain a significant load-dependent sensor signal. Based on an angle-selective coupling of 30° to the fiber axis, a drop of 4% of the optically transmitted light power by a load of 8 N/mm2 can be detected for the adhesively bonded pipe-to-socket joint with the structural adhesive Scotch Weld DP810 (2C acrylate). KW - Fiber optics KW - Sensors KW - Adhesive bonding Y1 - 2023 U6 - https://doi.org/10.3390/s23104748 SN - 1424-8220 VL - 23 IS - 10 PB - MDPI AG ER - TY - JOUR A1 - Hager, Simon A1 - Oesinghaus, Helge A1 - Bachmann, Alexander A1 - Meinardus, Martin A1 - Hofmann, Thomas A1 - Engelbrecht, Rainer A1 - Glas, Karl T1 - CaCO₃ deposits in reverse osmosis Part III – Incipient Scaling detection via polymer optical fibre sensors. Comparison to hydrochemical prediction and image analytical methods JF - Brewing Science KW - Fiber optics KW - Reverse osmosis KW - Sensor Y1 - 2023 U6 - https://doi.org/10.23763/brsc23-03hager VL - 76 IS - 3/4 ER - TY - JOUR A1 - Weiland, Josef A1 - Kunze, Billy A1 - Luber, Michael A1 - Krüger, Naomi A1 - Schiebahn, Alexander A1 - Engelbrecht, Rainer A1 - Reisgen, Uwe T1 - Structural Health Monitoring of Adhesively Bonded Pipe-to-Socket Joints by Integration of Polymer Optical Fibers and Their Load-Dependent Transmission Properties JF - Sensors N2 - Adhesively bonded pipe-to-socket joints are used in numerous industrial applications. One example is in the transport of media, e.g., in the gas industry or in structural joints for such sectors as construction, wind energy, and the vehicle industry. To monitor such load-transmitting bonded joints, this study investigates a method based on the integration of polymer optical fibers into the adhesive layer. Previous methods for monitoring the condition of pipes, such as acoustic or ultrasonic methods or the use of glass fiber optic-based sensors (FBG or OTDR), are very complex in methodology and require cost-intensive (opto-) electronic devices to generate and evaluate the sensor signals; they are therefore unsuitable for large-scale use. The method investigated in this paper is based on the measurement of integral optical transmission with a simple photodiode under increasing mechanical stress. When tried at coupon level (single-lap joint), the light coupling was varied to obtain a significant load-dependent sensor signal. Based on an angle-selective coupling of 30° to the fiber axis, a drop of 4% of the optically transmitted light power by a load of 8 N/mm2 can be detected for the adhesively bonded pipe-to-socket joint with the structural adhesive Scotch Weld DP810 (2C acrylate). KW - Fiber optics KW - Adhesive bonds KW - Sensors Y1 - 2023 U6 - https://doi.org/10.3390/s23104748 SN - 1424-8220 VL - 23 IS - 10 PB - MDPI AG ER - TY - GEN A1 - Dengler, Simon Andreas A1 - Käfferlein, Tilmann A1 - Engelbrecht, Rainer A1 - Schmauss, Bernhard A1 - Ziemann, Olaf T1 - Dependence of POF End Surface Reflectivity on Surface Roughness T2 - Proceedings POF2023 KW - Fiber optics Y1 - 2023 ER -