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MM: Fachverband Metall- und Materialphysik

MM 16: Poster Ia

MM 16.12: Poster

Montag, 18. März 2024, 18:30–20:30, Poster E

Usability and Performance Analysis of 3D-Ink-Jet-Printed Load Cells with Resistive and Capacitive Strain Gauges — •Michael Feige, Lennart Schwan, and Sonja Schöning — Institute for Applied Materials Research (BIfAM), Hochschule Bielefeld - University of Applied Sciences and Arts, Bielefeld, Germany

Strain gauges can be used in a variety of different measurements e.g., to measure forces in manufacturing systems, to continuously monitor displacement of building structures. Furthermore, are they used in simple bathroom scales, kitchen scales and precision instruments with accuracies up to thousands of a gram. We utilize a 3D-Ink-Jet-Printer to manufacture flexible plastic devices with integrated strain gauges consisting of traces for resistive measurements or electrode arrays for capacitive measurements made of sintered silver ink. This additive manufacturing process provides a big advantage in scalability and flexibility over conventional methods and can avoid the necessity of bonding the strain gauges to a substrate adhesively. Printing measuring devices with dimensions of several millimeters up to several centimeters, an adaption to fulfill different geometric constraints e.g., due to housing or mounting, and fine tuning by thinning or thickening materials in particular areas is possible without great effort. Even more or less complex formations of multiple strain gauges combined in one device are feasible. We print different designs and examine them with regard to their sensitivity, hysteresis, non-reversible effects of stress and temperature stability.

Keywords: strain gauge; inkjet; 3D; printing; 3d printing