Integration Without Disruption: The Basic Challenge of Sensor Integration

Dumstorff, Gerrit; Paul, Steffen; Lang, Walter

doi:10.1109/jsen.2013.2294626

Cited by 53 publications

(25 citation statements)

References 36 publications

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“…The sensors should be embedded between two plies of the fiberplane (fabric) to provide accurate results [4][5][6][7] and cannot be taken out from composite when the curing process is completed. Thus, "Sensors have to be embedded in a way which does provide the information needed for monitoring, but which does not downgrade the macroscopic behavior of the composite material" [8]. The idea is to reduce the sensor's size and to improve the compatibility of the inlay with the materials of composite (matrix and fiber).…”

Section: Introductionmentioning

confidence: 99%

Embedding rigid and flexible inlays in carbon fiber reinforced plastics

Moghaddam

Boll

Lang

2014

2014 IEEE/ASME International Conference on Advanced Intelligent Mechatronics

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For producing Carbon Fiber Reinforced Plastics (CFRP) with desired mechanical and physical properties, it is essential to monitor the polymerization process. Therefore, sensors will be embedded in the composite in order to monitor temperature, pressure and/or curing index online. Inlays are foreign-objects in CFRP and behave as a wound in the composite. The composite may resist to foreign-objects. The impact of embedding sensors (inlays) on homogeneity and structural integrity of CFRP is not known yet. The aim of this study is to investigate the influence of embedding inlay on the mechanical properties of CFRP. Inlays of different materials from thick and rigid (silicon with different thicknesses) to soft and flexible (Polyimide and SU8) were embedded in the CFRP composite. These inlays are considered as embedded sensors for online monitoring. The impact of the inlay's different sizes, types and patterns (existence of cavities) on composite were investigated by performing inter-laminar shear strength tests. The results of the inter-laminar shear strength tests clarified that not only can the flexibility of embedded sensors reduce the foreign-object effect of that in the composite, but also altering the size and substrate's patterning can play an important role in improving the properties of composite with the embedded sensors.

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Section: Introductionmentioning

confidence: 99%

Embedding rigid and flexible inlays in carbon fiber reinforced plastics

Moghaddam

Boll

Lang

2014

2014 IEEE/ASME International Conference on Advanced Intelligent Mechatronics

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“…Furthermore, the sensor itself might reduce the adhesion of the adhesive. Due to this, the mechanical structure can be weakened which is called "the foreign body effect" [7]. Mechanical tests will be done to investigate the influence of the sensor on the mechanical strength of the bonding.…”

Section: Discussionmentioning

confidence: 99%

Surface Integrated Printed Interdigital Structure for Process Monitoring the Curing of an Adhesive Joint

Hübner

Lang

Dumstorff

2017

Proceedings of Eurosensors 2017, Paris, France, 3–6 September 2017

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We present a printable interdigital structure, integrated into the surface of a component, to monitor the curing of two adhesively joint components during the fabrication process. In the factory of the future there is a need of new sensor concepts beside the information technological infrastructure. Monitoring of the fabrication enables automated control of the process which improves the quality of adhesive joints. In addition, the cost can be reduced by individually adapted curing times. We demonstrate that cure monitoring with the printed interdigital structure is possible. Two adhesives, a fast and a slow curing one, are analyzed to show the high potential of this process monitoring method.

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“…To this end, many examples of sensor integration into materials fabricated by traditional processes, such as concrete (Martínez and Andrade, 2009;Qin and Li, 2008), fiber-reinforced compounds (Hautamaki et al, 1999;Salas et al, 2014), or metals (Ibragimov et al, 2012;Klassen et al, 2012), can be found in the literature. Here, planar microfabrication of the sensor elements often results in limitations in terms of device geometry, material options, or integration challenges (Dumstorff et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

3-D-printed smart screw: functionalization during additive fabrication

Gräbner¹,

Dödtmann²,

Dumstorff³

et al. 2018

J. Sens. Sens. Syst.

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Abstract.Integrating sensors into machine parts is a necessary step for the development of smart or intelligent components. Sensors integrated into materials such as concrete, fiber compounds, or metals are already used to measure strain, temperature, or corrosion. The integration is mostly done during fabrication, where the sensor is recast in the material during processing. However, approaches to integrate sensors into parts fabricated by additive manufacturing are still rarely found. Especially in the case of rapid prototyping, additive techniques are already substituting the machining of parts using classical technologies like cutting, drilling and milling. To characterize such 3-D-printed machine parts the direct integration of sensing elements is the next logical step. This can be done in multi-material printing by using insulating, magnetic, and conductive materials. In the case of single material printing, our idea is to integrate a sensing element during the printing process itself. As proofof-concept, we present the functionalization of 3-D-printed screws. Strain gauges screen-printed on a 6 µm thick foil are interposed into the 3-D part during microstereolithography printing. We measure the torsional strain in the screw head to calculate the prestressing force in screws made from different plastic materials. We also analyze the defect effect by comparing it to screws without integrated elements.

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Integration Without Disruption: The Basic Challenge of Sensor Integration

Cited by 53 publications

References 36 publications

Embedding rigid and flexible inlays in carbon fiber reinforced plastics

Embedding rigid and flexible inlays in carbon fiber reinforced plastics

Surface Integrated Printed Interdigital Structure for Process Monitoring the Curing of an Adhesive Joint

3-D-printed smart screw: functionalization during additive fabrication

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