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

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

1
Department of Civil Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Da’an Dist., Taipei 106, Taiwan
2
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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Abstract

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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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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