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

Sensors ◽  
2017 ◽  
Vol 18 (2) ◽  
pp. 19 ◽  
Author(s):  
Shu-Wei Chang ◽  
Tzu-Kang Lin ◽  
Shih-Yu Kuo ◽  
Ting-Hsuan Huang
Keyword(s):  
High Resolution ◽  
Structural Health Monitoring ◽  
3D Printing ◽  
Health Monitoring ◽  
Structural Health ◽  
Displacement Sensors

New Directions of Health Monitoring for Building Structures

2016 ◽  
Vol 101 ◽  
pp. 15-19
Author(s):  
Akira Nishitani ◽  
Ping Xiang ◽  
Shohei Marutani ◽  
Tomohiko Hatada ◽  
Ryuta Katamura
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Building Structures ◽  
Structural Health ◽  
Displacement Sensors ◽  
New Directions ◽  
Story Drift ◽  
Direct Sensing ◽  
Structural Engineers

The concept of structural health monitoring (SHM) has appealed the attentions of structural engineers. However, most of the proposed schemes for SHM do not seem “friendly” to the practicing engineers in terms of the used data or employed methods. In this regard, the direct sensing of inter-story drift displacements could open the door to the construction of “practicing engineers friendly” SHM schemes. The authors‘ group developed non-contact types of inter-story drift displacement sensors. Several schemes based on the drift displacement sensing are discussed, which do not involve heavy researchers-oriented processes.

scholarly journals A 3D Printed, Constriction-Resistive Sensor for the Detection of Ultrasonic Waves

2021 ◽  
Keyword(s):  
Structural Health Monitoring ◽  
3D Printing ◽  
Health Monitoring ◽  
Low Cost ◽  
Ultrasonic Waves ◽  
Fused Deposition Modelling ◽  
Fused Filament Fabrication ◽  
Engineering Structures ◽  
Structural Health ◽  
Fused Deposition

Abstract. Ultrasonic waves, either bulk waves or guided waves, are commonly used for non-destructive evaluation, for example in structural health monitoring. Traditional sensors for detecting ultrasonic waves include metallic strain gauges and piezoelectric ceramics. Recently piezoresistive nanocomposites have emerged as a promising sensor with high sensing range. In this paper, a constriction-resistive based sensor made from a graphene reinforced PLA filament is developed using a fused deposition modelling 3D printing approach as a novel type of ultrasonic sensor for structural health monitoring purposes. The sensor is made of very low-cost and recyclable thermoplastic material, which is lightweight and can be either directly printed onto the surface of various engineering structures, or embedded into the interior of a structure via fused filament fabrication 3D printing. These characteristics make this sensor a promising candidate compared to the traditional sensors in detecting ultrasonic waves for structural health monitoring. The printed sensors can detect ultrasonic signals with frequencies around 200 kHz, with good signal-to-noise ratio and sensitivity. When deployed between two adjacent printed tracks , and exploiting a novel kissing-bond mechanism, the sensor is capable of detecting ultrasonic waves. Several confirmatory experiments were carried out on this printed sensor to validate the capability of the printed sensor for structural health monitoring.

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