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- W2988632010 abstract "Abstract The Acoustic Emission (AE) method has been applied to detect and locate the position of defects in hollow structures such as piping structures and pressure vessels. The AE method relies on propagating elastic waves initiated by sudden dynamic deformation. Considering the ratio of length to diameter in typical piping structures, the source localization is considered as a one-dimensional problem. However, localizing the circumferential position of defect is also important for large diameter pipes or pressure vessels. Conventional 1D and 2D localization algorithms assume straight path between source and sensor, which can induce error into measurement for curved structures. In this paper, a phase array AE localization strategy is introduced to localize both radial and axial positions of defects by considering the actual trajectory of propagating elastic waves. Sensor array is positioned around the circumference of structure in order to determine source angle and axial location from the arrival time differences of neighbor sensors triggered by the same wave mode. The influence of source-sensor distance is studied by varying the axial and radial positions of the simulated source in the numerical models. The numerical results are tested on a cylindrical structure to validate the localization algorithm. It is shown that with the increase of the aspect ratio of axial distance to radial spacing of sensors, the accuracy of the phase array localization with accessing only to one end of hollow structure improves." @default.
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- W2988632010 date "2020-02-01" @default.
- W2988632010 modified "2023-10-08" @default.
- W2988632010 title "Phased acoustic emission sensor array for localizing radial and axial positions of defects in hollow structures" @default.
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- W2988632010 doi "https://doi.org/10.1016/j.measurement.2019.107223" @default.
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