Efficient Localization of Low-Frequency Sound Source With Non-Synchronous Measurement at Coprime Positions by Alternating Direction Method of Multipliers

Liu, Qin; Chu, Ning; Yu, Liang; Ning, Yue; Wu, Peng

doi:10.1109/tim.2022.3156992

Cited by 2 publications

(1 citation statement)

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“…In Refs. [27,28], a non-synchronous array measurement is elaborated to break through the beamforming barrier of acoustic imaging in the low-frequency domain. The above research has focused on improving imaging algorithms to enhance positioning speed, accuracy, and economy.…”

Section: Introductionmentioning

confidence: 99%

Topology Optimization Design Method for Acoustic Imaging Array of Power Equipment

Xiong,

Zha,

Pei

et al. 2024

Sensors

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Acoustic imaging technology has the advantages of non-contact and intuitive positioning. It is suitable for the rapid positioning of defects such as the mechanical loosening, discharge, and DC bias of power equipment. However, the existing research lacks the optimization design of microphone array topology. The acoustic frequency domain characteristics of typical power equipment are elaborately sorted out. After that, the cut-off frequencies of acoustic imaging instruments are determined, to meet the needs of the full bandwidth test requirements. Through a simulation calculation, the circular array is demonstrated to be the optimal shape. And the design parameters affect the imaging performance of the array to varying degrees, indicating that it is difficult to obtain the optimal array topology by an exhaustive method. Aimed at the complex working conditions of power equipment, a topology optimization design method of an acoustic imaging array for power equipment is proposed, and the global optimal solution of microphone array topology is obtained. Compared with the original array, the imaging performance of the improved LF and HF array is promoted by 54% and 49%, respectively. Combined with the simulation analysis and laboratory test, it is verified that the improved array can not only accurately locate the single sound source but also accurately identify the main sound source from the interference of the contiguous sound source.

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Section: Introductionmentioning

confidence: 99%