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Sensors 2018, 18(1), 19; doi:10.3390/s18010019

Integration of High-Resolution Laser Displacement Sensors and 3D Printing for Structural Health Monitoring

Department of Civil Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Da’an Dist., Taipei 106, Taiwan
Department of Civil Engineering, National Chiao Tung University, No. 1001, Daxue Rd., East Dist., Hsinchu 300, Taiwan
Author to whom correspondence should be addressed.
Received: 1 October 2017 / Revised: 17 December 2017 / Accepted: 19 December 2017 / Published: 22 December 2017
(This article belongs to the Special Issue Sensor Technologies for Health Monitoring of Composite Structures)
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This paper presents a novel experimental design for complex structural health monitoring (SHM) studies achieved by integrating 3D printing technologies, high-resolution laser displacement sensors, and multiscale entropy SHM theory. A seven-story structure with a variety of composite bracing systems was constructed using a dual-material 3D printer. A wireless Bluetooth vibration speaker was used to excite the ground floor of the structure, and high-resolution laser displacement sensors (1-μm resolution) were used to monitor the displacement history on different floors. Our results showed that the multiscale entropy SHM method could detect damage on the 3D-printed structures. The results of this study demonstrate that integrating 3D printing technologies and high-resolution laser displacement sensors enables the design of cheap, fast processing, complex, small-scale civil structures for future SHM studies. The novel experimental design proposed in this study provides a suitable platform for investigating the validity and sensitivity of SHM in different composite structures and damage conditions for real life applications in the future. View Full-Text
Keywords: 3D printing; structural health monitoring; multiscale entropy; composites 3D printing; structural health monitoring; multiscale entropy; composites

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Chang, S.-W.; Lin, T.-K.; Kuo, S.-Y.; Huang, T.-H. Integration of High-Resolution Laser Displacement Sensors and 3D Printing for Structural Health Monitoring. Sensors 2018, 18, 19.

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