Results 21 to 30 of about 1,173,563 (331)

A Highly Integrated BOTDA/XFG Sensor on a Single Fiber for Simultaneous Multi-Parameter Monitoring of Slopes

Sensors, 2019
A highly integrated sensing technology, combining a stimulated Brillouin scattering-based distributed sensor with XFG (fiber Bragg grating (FBG) and long-period fiber grating (LPFG)) sensors on a single fiber, is proposed for the simultaneous measurement
Feng Li, Weigang Zhao, Hongbin Xu, Shupeng Wang, Yanliang Du   +4 more
doaj   +1 more source

Multi-Dimensional Uniform Initialization Gaussian Mixture Model for Spar Crack Quantification under Uncertainty

Sensors, 2021
Guided Wave (GW)-based crack monitoring method as a promising method has been widely studied, as this method is sensitive to small cracks and can cover a wide monitoring range.
Qiuhui Xu, Shenfang Yuan, Tianxiang Huang   +2 more
doaj   +1 more source

Influence of Compaction Level on the Water-Heat-Vapor Characteristics of Unsaturated Coarse-Grained Fillings Exposed to Freezing and Thawing

Advances in Civil Engineering, 2020
Compaction level is an important control index to guarantee subgrade stability. Under freezing-thawing cycles, water-heat-vapor characteristics due to different compaction levels of unsaturated coarse-grained fillings of high-speed railway (HSR) subgrade
Yuzhi Zhang, An Wen, Weigang Zhao, Xiaojie Liang, Pei Li   +4 more
doaj   +1 more source

Acoustic Emission Monitoring of Fatigue Crack Growth in Mooring Chains

Applied Sciences, 2019
Offshore installations are subject to perpetual fatigue loading and are usually very hard to inspect. Close visual inspection from the turret is usually too hazardous for divers and is not possible with remotely operated vehicles (ROVs) because of the ...
Ángela Angulo, Jialin Tang, Ali Khadimallah, Slim Soua, Cristinel Mares, Tat-Hean Gan   +5 more
doaj   +1 more source

Guided Wave Characteristic Research and Probabilistic Crack Evaluation in Complex Multi-Layer Stringer Splice Joint Structure

Sensors, 2023
Multi-layer and multi-rivet connection structures are critical components in the structural integrity of a commercial aircraft, in which elements like skin, splice plate, strengthen patch, and stringer are fastened together layer by layer with multiple ...
Jian Chen, Yusen Xu, Shenfang Yuan, Zhen Qin   +3 more
doaj   +1 more source

Experimental Study of Damage Development in Salt Rock under Uniaxial Stress Using Ultrasonic Velocity and Acoustic Emissions

Applied Sciences, 2018
Ultrasonic waves and acoustic emissions (AE) are important technologies to reveal rock damage. However, few studies have simultaneously monitored both types of data in the same experiment because of limitations on the experimental apparatus.
Haoran Li, Zhikai Dong, Yun Yang, Bo Liu, Mingyi Chen, Wenjun Jing   +5 more
doaj   +1 more source

Fatigue Crack Evaluation with the Guided Wave–Convolutional Neural Network Ensemble and Differential Wavelet Spectrogram

Sensors, 2021
On-line fatigue crack evaluation is crucial for ensuring the structural safety and reducing the maintenance costs of safety-critical systems. Among structural health monitoring (SHM), guided wave (GW)-based SHM has been deemed as one of the most ...
Jian Chen, Wenyang Wu, Yuanqiang Ren, Shenfang Yuan   +3 more
doaj   +1 more source

Development of a robust structural health monitoring system for wind turbine foundations [PDF]

, 2012
The construction of onshore wind turbines has rapidly been increasing as the UK attempts to meet its renewable energy targets. As the UK’s future energy depends more on wind farms, safety and security are critical to the success of this renewable energy ...
Currie, Magnus, Quail, Francis, Saafi, Mohamed   +2 more
core   +1 more source

Vibration-Based structural health monitoring using piezoelectric transducers and parametric t-SNE [PDF]

, 2020
In this paper, we evaluate the performance of the so-called parametric t-distributed stochastic neighbor embedding (P-t-SNE), comparing it to the performance of the t-SNE, the non-parametric version.
Agis Cherta, David, Pozo Montero, Francesc   +1 more
core   +2 more sources

High Precision, Small Size and Flexible FBG Strain Sensor for Slope Model Monitoring

Sensors, 2019
In this paper, a soft fiber Bragg grating (FBG) strain sensor was constructed of a rubber strip, FBGs and steel plates, which exhibits the advantages of high precision and a small size.
Hongbin Xu, Xinyu Zheng, Weigang Zhao, Xu Sun, Feng Li, Yanliang Du, Bo Liu, Yang Gao   +7 more
doaj   +1 more source