Three-dimensional localization of gas leakage using acoustic holography

Li, Lei; Wang, Shenghui; Li, Feng; Zheng, Xiya; Wu, Yongqing; Gao, Yang; Qiao, Yiting

doi:10.1016/j.ymssp.2022.108952

Cited by 11 publications

(3 citation statements)

References 46 publications

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“…Microphones [1,2] that can convert acoustic signals into electricity, underpin applications including photoacoustics [3], biomedical imaging [4], hearing aids [5], voice interactions [6], and industrial gas leakage detection [7]. Traditional electrical microphones represent the current state-of-the-art [8][9][10] but encounter three primary performance limitations.…”

Section: Introductionmentioning

confidence: 99%

Ultrasensitive diamond cantilever-based optical microphone

Li,

Tian,

Lin

et al. 2024

Preprint

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Microphones play a pivotal role in extending the capabilities of voice interaction, biomedical testing, and trace gas detection. Acquiring acoustic signals with high sensitivity, low noise, and broad frequency response in a compact form is a well-known challenge. Herein, we report a novel diamond cantilever-based optical microphone (DCOM) using a Fabry-Perot interferometric structure. The DCOM achieves ultrahigh sensitivity (1433.8 mVamp/Pa or 1013.8 mVrms/Pa) and a minimum detectable acoustic pressure (0.24 µPa/Hz^1/2), both of which represent among the best values ever reported for a microphone with identical geometry, alongside a broad frequency response spanning from 500 Hz to 6.5 kHz. The outstanding performance of the DCOM can be attributed to the extraordinary mechanical strength, low energy dissipation, and low thermal noise of the diamond. In addition, the DCOM-based system demonstrates high performance in weak sound detection over a long distance, revealing its promising applications in various challenging industrial fields.

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Section: Introductionmentioning

confidence: 99%

Ultrasensitive diamond cantilever-based optical microphone

Li,

Tian,

Lin

et al. 2024

Preprint

Self Cite

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“…In recent decades, sound source localization has been widely used in many fields such as pipeline leakage detection [6,7], indoor target source localization [8], and intelligent robotics [9]. Therefore, sound source localization has attracted the attention of many scholars, who have proposed various methods, including beamforming [10], acoustic holography [11], parameter measurement method [12][13][14], and compressed sensing [15]. A nonlinear equation system is constructed using a parameter measurement method based on the localization parameter, where the solution is the estimated position of the sound source.…”

Section: Introductionmentioning

confidence: 99%

Research on acoustic localization method for multiple leakage sources of water-cooling wall in furnace

Kong,

Yang,

Liu

et al. 2024

Meas. Sci. Technol.

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The water-cooling wall of a furnace often leaks under harsh conditions, such as high temperature and pressure, which affects the safe and economic operation of the boiler. To achieve the localization of multiple leakage sources in a water-cooling wall, an acoustic positioning method based on improved differential evolution and density-based spatial clustering of application with noise (IDE-DBSCAN) is proposed. The nonlinear equation system is constructed using the time delay of arrival (TDOA) obtained by the generalized second cross-correlation algorithm, and the IDE algorithm is used to solve the nonlinear equation system and obtain multiple spatial positions corresponding to multiple TDOA sequences. To eliminate false leakage sources, IDE-DBSCAN is presented to cluster multiple estimated positions. The number of clusters obtained is the number of leakage sources, and the cluster centers are the location coordinates of the leakage sources. The numerical simulation results show that, compared to traditional acoustic positioning methods, IDE-DBSCAN has a higher positioning accuracy and better anti-noise ability. In addition, experiments are conducted on multiple leakage sound sources within a measurement area of 1 m × 1 m × 1.06 m, and the positioning errors remain within 5 cm. The proposed method provides a theoretical basis and experimental verification for further research on the localization of multiple leakages of water-cooling wall in furnace.

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“…Acoustic sensors convert acoustic energy into electricity, applicable in fields including industrial measurements, 1 photoacoustic spectroscopy, 2 and leakage detection. 3 Traditional electro-acoustic sensors suffer from low sensitivity and electrical noise. Fiber-optic acoustic sensors (FOASs) have drawn attention due to advantages encompassing high sensitivity, simple fabrication, and immunity to electromagnetic interference.…”

Section: Introductionmentioning

confidence: 99%

Highly sensitive fiber-optic acoustic sensor utilizing a hollow cantilever

Tian,

Qiao,

Liang

et al. 2023

Advanced Sensor Systems and Applications XIII

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Sensitivity optimization in acoustic sensors necessitates the development of acoustic-sensitive elements. Among various designs, the cantilever structure has emerged as a highly sensitive choice. In this study, we introduce a novel Fabry-Perot (F-P) interferometric fiber-optic acoustic sensor (FOAS) that integrates a hollow cantilever structure. The proposed structure enhances vibration flexibility by reducing both the effective mass and spring constant of the cantilever. Experimental results demonstrate that the proposed structure outperforms the original design in terms of sensitivity. Notably, at 1.7 kHz, the sensitivity and minimum detectable acoustic pressure level (MDP) reach 91.4 mV/Pa and 6.2 µPa/ √ Hz, respectively. The proposed hollow cantilever establishes an optimization framework for highly sensitive acoustic sensors.

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Three-dimensional localization of gas leakage using acoustic holography

Cited by 11 publications

References 46 publications

Ultrasensitive diamond cantilever-based optical microphone

Ultrasensitive diamond cantilever-based optical microphone

Research on acoustic localization method for multiple leakage sources of water-cooling wall in furnace

Highly sensitive fiber-optic acoustic sensor utilizing a hollow cantilever

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