Results 31 to 40 of about 8,553,533 (250)
DETECTING DEBRIS FLOWS BY DISTRIBUTED ACOUSTIC SENSING [PDF]
, 2020 In this work, we have monitored some debris flows in an artificial inclined flume, instrumented with approx. 800 m of fiber, wound in 20 coils. The fiber was interrogated using a distributed acoustic sensing (DAS) system based on a chirped-pulses phase ...
Gianluca Guerra +16 more
core +1 more source
Research progress of earth exploration technologies based on distributed acoustic sensing
地质科技通报, 2023 As a new type of fiber optic sensing technology for long-distance, distributed and real-time monitoring, distributed acoustic sensing (DAS) has been a wide concern since its initiation.
Wei Liu +3 more
doaj +1 more source
Review of conventional and deep learning assisted methods for distributed acoustic sensing denoising
Discover SensorsDistributed acoustic sensing (DAS) turns a fiber optic cable into a kilometers-long sensing array. These DAS systems offer extended coverage, good sensitivity, and fine spatial resolution.
Huda Adnan Zain, Khurram Karim Qureshi
doaj +1 more source
Advanced Engineering Materials, EarlyView.This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal +2 more
wiley +1 more source
Scientific ReportsThe pipeline conveying system as the gangue slurry filling technology lifeline. The occurrence of pipeline blockage will lead to the paralysis of the entire filling system; timely detection of pipeline blockage and early warning are needed to ensure the ...
Lei Zhu +7 more
doaj +1 more source
Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying
Advanced Engineering Materials, EarlyView.An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara +8 more
wiley +1 more source
Recent Progress in Distributed Fiber Acoustic Sensing with Φ-OTDR
Sensors, 2020 Distributed fiber acoustic sensing (DAS) technology can continuously spatially detect disturbances along the sensing fiber over long distance in real time.
Zhaoyong Wang +3 more
doaj +1 more source
Distributed acoustic sensing: towards partial discharge monitoring
, 2015 We report on the successful application of distributed acoustic sensing (DAS) to the detection of partial discharge (PD). A detection limit of about 1 nC discharge magnitude was achieved for PD in a real-scale model of a high voltage termination ...
Krebber, Katerina +5 more
core +1 more source
Symmetry‐Guided Multifunctional Acoustic System Based on Mechanically Actuated Sonic Crystals
Advanced Engineering Materials, EarlyView.This study presents the design, simulation, and experimental validation of amultifunctional acoustic metamaterial based on rotationally engineered sonic crystals.By tuning cylinder orientations, controllable band gaps and six distinct functionalities—including switching, topological insulation, beam splitting, and logic operations—areachieved ...
Yuanyan Zhao +2 more
wiley +1 more source
Comparison of Triply Periodic Minimal Surface Energy Absorbers Under Uniaxial Compressive Loading
Advanced Engineering Materials, EarlyView.This study investigates LCD 3D printed Triply Periodic Minimal Surface (TPMS) structures as mechanical energy absorbers. By comparing various base designs and layered combinations under uniaxial compression, it identifies that a Diamond‐Gyroid sandwich structure offers superior performance.
Sergej Grednev +2 more
wiley +1 more source