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

A technology of deep-sea hydrothermal fluid and detection method, which is applied in the direction of using a device that measures the time required to move a certain distance, can solve problems such as inability to accurately estimate heat energy flux

Inactive Publication Date: 2010-06-09
HANGZHOU DIANZI UNIV
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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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  • In situ on-line acoustic detection method of velocity field at deep-sea hydrothermal vent
  • In situ on-line acoustic detection method of velocity field at deep-sea hydrothermal vent
  • In situ on-line acoustic detection method of velocity field at deep-sea hydrothermal vent

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Embodiment Construction

[0039] The principle and structure of the present invention will be further described below in conjunction with the accompanying drawings.

[0040] Such as figure 1 As shown, the device consists of two layers of RHS-30 underwater acoustic transducers on the upper layer B and the lower layer A, each layer is equipped with sixteen RHS-30 underwater acoustic transducers, and sixteen RHS-30 underwater acoustic transducers on the same layer The transducers are all on the same level, the height between the upper and lower layers is 1m (any height between 0.2m and 5m is suitable for velocity field reduction experiments), and the RHS-30 underwater acoustic transducers in the lower layer are in a clockwise order Arranged evenly from the first RHS-30 underwater acoustic transducer to the sixteenth RHS-30 underwater acoustic transducer, the upper RHS-30 underwater acoustic transducer is also clockwise from the first RHS-30 The hydroacoustic transducers to the sixteenth RHS-30 hydroacousti...

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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 transducers in 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P3/80
Inventor 潘华辰陈鹰樊炜毛洁白燕蔡勇张祝军
Owner HANGZHOU DIANZI UNIV
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