In situ on-line acoustic detection method of velocity field at deep-sea hydrothermal vent

Abstract

The invention relates to an in situ on-line acoustic detection method of velocity field at a deep-sea hydrothermal vent. The traditional hydrothermal vent velocity field detection method can not accurately measure the velocity distribution at a hydrothermal vent. The method comprises the steps of: firstly enabling a underwater transducer No.1 in the lower layer to transmit acoustic signals, and receiving the acoustic signals by all underwater transducers in the upper layer, which are used as receiving underwater transducers, and calculating the transit time of the acoustic wave between the underwater transducer No.1 in the lower layer and all the underwater transducers in the upper layer; secondly, repeating the process to obtain the transit time of the acoustic wave between each underwater transducer in the lower layer and all the underwater transducers in the upper layer; then using the underwater transducers in the upper layer to transmit acoustic wave, using all the underwater transducers in the lower layer to receive the acoustic wave, and calculating the transit time of the acoustic wave between each underwater transducer in the upper layer and all the underwater transducersin the lower layer; and finally rebuilding the two dimension mean normal velocity field at the deep-sea hydrothermal vent by adopting data reduction chromatography. The method adopts a non-contact measuring mode, can perform continuous real time measuring in severe environment, and improves the measuring accuracy of heat flux at the hydrothermal vent.

Description

technical field [0001] The invention belongs to the technical field of deep-sea equipment, and relates to an in-situ online acoustic detection method for a velocity field of a deep-sea hydrothermal vent. Background technique [0002] The measurement of the heat flux at the hydrothermal vent where the hydrothermal flow is concentrated has become an important part of scientific issues such as studying the heat dissipation of the oceanic crust, establishing the ocean circulation model, and studying its influence on the physical characteristics of the adjacent sea area. In addition, the measurement of the heat flux at the hydrothermal vent also provides an important basis for the study of the characteristics of the hydrothermal fluid itself, the law of convective diffusion of the chemical components it carries in seawater, chemical reactions, ore-forming mechanisms, and the ecological environment for hydrothermal formation. . One of the keys to the in-situ measurement technolog...

AI Technical Summary

Problems solved by technology

Marine scientists cannot accurately estimate the heat flux of the entire warm-ocean ridge profile in the ridge-ocean reaction zone, and can only make an appropriate estimate based on existing data

At present, there is no domestic method that can realize in-situ monitoring of hydrothermal vent velocity field and provide quantitative velocity field information.

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