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Found 1 result for Nikolay Gueorguiev[Author]
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. 2020 Mar 30;20(7):1944.
doi: 10.3390/s20071944.

Frequency Response Stabilization and Comparative Studies of MET Hydrophone at Marine Seismic Exploration Systems

Egor Egorov  1 , Anna Shabalina  1   2 , Dmitry Zaitsev  1 , Sergey Kurkov  1 , Nikolay Gueorguiev  3
Affiliations
Free PMC article

Frequency Response Stabilization and Comparative Studies of MET Hydrophone at Marine Seismic Exploration Systems

Egor Egorov et al. Sensors (Basel). .
Free PMC article

Abstract

Low frequency hydrophone with a frequency range of 1-300 Hz for marine seismic exploration systems has been developed. The operation principle of the hydrophone bases on the molecular electronic transfer that allows high sensitivity and low level self-noise at low frequencies (<10 Hz) to be achieved. The paper presents a stabilization method of the frequency response within the frequency range at a depth up to 30 m. Laboratory and marine tests confirmed the stated characteristics as well as the possibility of using this sensor in bottom marine seismic systems. An experimental sample of the hydrophone successfully passed a comparative marine test at Gelendzhik Bay (Black Sea) with the technical support of Joint-Stock Company (JSC) "Yuzhmorgeologiya". One of the main results is the possibility of obtaining high-quality information in the field of low frequencies, which was demonstrated in the course of field tests.

Keywords: acoustic sensor; geoscience; hydrophone; molecular-electronic technology; negative electrodynamic feedback; seismic exploration.

Conflict of interest statement

The authors declare no conflicts of interest.

Figures

Figure 1
Figure 1
Hydrophone: (a) scheme; (b) design [19]; (c) experimental sample [19].
Figure 2
Figure 2
The carrier concentration gradient in the transducing cell under the influence of external pressure variations. c(x) is the ion concentration; (a) distribution without external pressure variations; (b) the distribution of concentration c(x) varies under the oncoming flow of liquid; u = fluid flow rate. A = anode, K = cathode.
Figure 3
Figure 3
The hydraulic bench.
Figure 4
Figure 4
Frequency response curves (0.8 mV/Pa) of the MET hydrophones under different pressure differences. (a) With the volume completely filled with liquid under the upper cover; (b) with the partially filled volume.
Figure 4
Figure 4
Frequency response curves (0.8 mV/Pa) of the MET hydrophones under different pressure differences. (a) With the volume completely filled with liquid under the upper cover; (b) with the partially filled volume.
Figure 5
Figure 5
Power spectral density of the hydrophone signals. Blue and light-red lines are the spectra of the hydrophone signals. Red line is the noise spectral density.
Figure 6
Figure 6
Hydrophones. (a) Reference hydrophone at GS-PV-1S; (b) molecular-electronic transfer (MET) hydrophone.
Figure 7
Figure 7
The scheme of the marine test. (1) hydrophones to compare; (2) single pneumatic source; (3) remote acquisition module.
Figure 8
Figure 8
Hydrophone submergence.
Figure 9
Figure 9
Signal (a) and spectra (b) of the hydrophone signals of the same shot in the marine test: blue line = MET hydrophone; red line = reference hydrophone.
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References

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