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Sensor Integrated Load-Bearing Structures: Measuring Axis Extension with DIC-Based Transducers

Al-Baradoni, Nassr ; Groche, Peter (2021):
Sensor Integrated Load-Bearing Structures: Measuring Axis Extension with DIC-Based Transducers. (Publisher's Version)
In: Sensors, 21 (12), e-ISSN 1424-8220,
DOI: 10.26083/tuprints-00019383,
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Item Type: Article
Origin: Secondary publication via sponsored Golden Open Access
Status: Publisher's Version
Title: Sensor Integrated Load-Bearing Structures: Measuring Axis Extension with DIC-Based Transducers
Language: English
Abstract:

In this paper we present a novel, cost-effective camera-based multi-axis force/torque sensor concept for integration into metallic load-bearing structures. A two-part pattern consisting of a directly incident and mirrored light beam is projected onto the imaging sensor surface. This allows the capturing of 3D displacements, occurring due to structure deformation under load in a single image. The displacement of defined features in size and position can be accurately analyzed and determined through digital image correlation (DIC). Validation on a prototype shows good accuracy of the measurement and a unique identification of all in- and out-of-plane displacement components under multiaxial load. Measurements show a maximum deviation related to the maximum measured values between 2.5% and 4.8% for uniaxial loads (Fx, Fy, Fz, Mz) and between 2.5% and 10.43% for combined bending, torsion and axial load. In the course of the investigations, the measurement inaccuracy was partly attributed to the joint used between the sensor parts and the structure as well as to eccentric load.

Journal or Publication Title: Sensors
Journal volume: 21
Number: 12
Collation: 21 Seiten
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 600 Technik
Divisions: 16 Department of Mechanical Engineering > Institut für Produktionstechnik und Umformmaschinen (PtU)
Date Deposited: 30 Aug 2021 12:08
Last Modified: 30 Aug 2021 12:08
DOI: 10.26083/tuprints-00019383
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-193831
Additional Information:

Keywords: sensor embedded structures; digital image correlation; multi-axis force/torque sensor; smart structures

URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/19383
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