Results 21 to 30 of about 2,686,420 (387)

Novel Fiber-Optic Ring Acoustic Emission Sensor

open access: yesSensors, 2018
Acoustic emission technology has been applied to many fields for many years. However, the conventional piezoelectric acoustic emission sensors cannot be used in extreme environments, such as those with heavy electromagnetic interference, high pressure ...
Peng Wei   +4 more
doaj   +1 more source

Helioseismic analysis of the solar flare-induced sunquake of 2005 January 15 [PDF]

open access: yes, 2006
We report the discovery of one of the most powerful sunquakes detected to date, produced by an X1.2-class solar flare in active region 10720 on 2005 January 15.
Besliu-Ionescu, D.   +4 more
core   +1 more source

DIAGNOSTICS OF DEFECT DETECTION IN THE INITIAL STAGES OF STRUCTURAL FAILURE USING THE ACOUSTIC EMISSION METHOD OF CONTROL [PDF]

open access: yesApplied Engineering Letters, 2022
The article presents the results of experimental estimation of the possibility of early registration of structural defects using the acoustic-emission method of control, based on the phenomenon of acoustic emission, which is the excitation of elastic ...
Sergey Grazion   +8 more
doaj   +1 more source

Comparative experimental studies of acoustic emission characteristics of sandstone and mudstone under the impacts of cyclic loading and unloading

open access: yesInternational Journal of Distributed Sensor Networks, 2018
In this article, the acoustic emission tests of uniaxial cyclic load imposed on or released from the sandstone and mudstone were carried out. The deformation and failure characteristics and the law governing the acoustic emission activity were studied ...
Guangming Zhao, Chao Wang, Dongxu Liang
doaj   +1 more source

The wear detection of mill-grinding tool based on acoustic emission sensor

open access: yesThe International Journal of Advanced Manufacturing Technology, 2021
The monitoring of tool wear plays an important role in improving the processing efficiency and reducing the production cost of enterprises. This paper is focused on the detection of electroplated diamond mill-grinding tools by using the acoustic emission
Wuzhen Huang   +3 more
semanticscholar   +1 more source

Structural damage monitoring for metallic panels based on acoustic emission and adaptive improvement variational mode decomposition–wavelet packet transform

open access: yesStructural Health Monitoring, 2021
The metallic panel acoustic emission signal with strong non-stationary properties is normally composed of multiple components (e.g. impulses, background noise, and other external signal), where impulses relevant to metallic panel are easily contaminated ...
Yang Li, Feiyun Xu
semanticscholar   +1 more source

Research of identification of acoustic emission signal of coal and rock

open access: yesGong-kuang zidonghua, 2013
In view of problem that it is difficult to identify acoustic emission signal of coal and rock burst under complicated noise environment, the paper proposed an identification method of acoustic emission signal of coal and rock based on wavelet packet and ...
TONG Min-ming   +3 more
doaj   +1 more source

Effect of steel fibres dosage in alkali-activated slag mortar on acoustic emission obtained during three-point bending tests

open access: yesMATEC Web of Conferences, 2017
The acoustic emission phenomenon is directly associated with nucleation of cracks in structural materials during loading. This paper analyses acoustic emission signals captured during three-point bending fracture tests of alkali-activated slag mortar ...
Topolář Libor   +3 more
doaj   +1 more source

Experimental study on characteristics of acoustic emission for coal containing gas damaged evolution under loading

open access: yesGong-kuang zidonghua, 2016
An information collection system of coal containing gas under uniaxial compression was built, dates' change of acoustic emission and mechanical parameters while coal samples loaded were tested, and damaged evolution model of coal and rock and ...
NIU Yue   +7 more
doaj   +1 more source

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