Interference immunity of hydroacoustic power flux receive systems

Gordienko, V. A.; Gordienko, E. L.; Krasnopistsev, N. V.; Nekrasov, V. N.

doi:10.1134/s1063771008050114

Cited by 10 publications

(2 citation statements)

References 1 publication

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“…The method of vibrating liquid column can also be used for calibration of the receiver. This method is usually used for calibration of the sensitivity of hydrophone, and it can also be used for calibration of vector receiver [6]. Anther widely used calibration method is standing wave comparison method, which calibrate the vector receiver using a reference hydrophone in a standing wave tube.…”

Section: Introductionmentioning

confidence: 99%

Low frequency absolute calibration of complex sensitivity of vector receivers in free-field

et al. 2019

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Three-transducers spherical wave reciprocity method in free-field is demonstrated effectively for absolute calibration of the complex sensitivity of underwater sound pressure gradient of vector receiver in the frequency range 250 Hz to 4 kHz. The regularity of underwater sound pressure gradient distribution in the spherical wave, the theory of three-transducers reciprocity calibration method and the technique of complex moving weighted average (CMWA) are studied and reviewed. The VHS90 vector receiver manufactured by Hangzhou Applied Acoustics Research Institute (HAARI) is calibrated using underwater sound pressure gradient calibration facility in a 50 m×15 m×10 m anechoic tank. To verify the results of measurements, the VHS90 vector receiver is also calibrated using low frequency vector receiver calibration facility and the underwater sound pressure calibration facility. The calibration results and the comparisons with these facilities prove the accuracy of the calibration method and facilities described in this paper. The max deviation of modulus of complex sensitivity is 0.7 dB and max deviation of phase congruency of three channels is 1.6°.

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Section: Introductionmentioning

confidence: 99%

Low frequency absolute calibration of complex sensitivity of vector receivers in free-field

et al. 2019

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“…13 That is, comparing the output of the tested MEMS vector hydrophone with the output of CS-3A standard hydrophone. 14,15 The expression of sensitivity is:…”

Section: B Calibration Test In the Standing Wave Tubementioning

confidence: 99%

Resonant frequency of the silicon micro-structure of MEMS vector hydrophone in fluid-structure interaction

2015

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The MEMS vector hydrophone developed by the North University of China has advantages of high Signal to Noise Ratio, ease of array integration, etc. However, the resonance frequency of the MEMS device in the liquid is different from that in the air due to the fluid-structure interaction (FSI). Based on the theory of Fluid-Solid Coupling, a generalized distributed mass attached on the micro-structure has been found, which results in the resonance frequency of the microstructure in the liquid being lower than that in the air. Then, an FSI simulation was conducted by ANSYS software. Finally, the hydrophone was measured by using a shaking table and a vector hydrophone calibration system respectively. Results show that, due to the FSI, the resonance frequency of the MEMS devices of the bionic vector hydrophone in the liquid declines approximately 30% compared to the case in the air.

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The Features of Formation of the Spatial Structure of the Vector-Scalar Sound Field in the shelf zone of the Sea of Japan

Strobykin

Morgunov

Golov

et al. 2022

2022 International Conference on Ocean Studies (ICOS)

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Interference immunity of hydroacoustic power flux receive systems

Cited by 10 publications

References 1 publication

Low frequency absolute calibration of complex sensitivity of vector receivers in free-field

Low frequency absolute calibration of complex sensitivity of vector receivers in free-field

Resonant frequency of the silicon micro-structure of MEMS vector hydrophone in fluid-structure interaction

The Features of Formation of the Spatial Structure of the Vector-Scalar Sound Field in the shelf zone of the Sea of Japan

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