In-situ on-line acoustic detection method for deep-sea hydrothermal port temperature field
A technology of deep-sea hydrothermal fluid and detection method, which is applied to thermometers, thermometers with physical/chemical changes, measuring devices, etc. mouth temperature etc.
Inactive Publication Date: 2013-04-24
HANGZHOU DIANZI UNIV
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Problems solved by technology
Existing methods mainly use temperature sensor arrays for measurement, but the traditional contact temperature measurement device has great limitations: first, contact measurement will interfere with the temperature of the hot liquid port; second, contact temperature measurement can only measure thermal The temperature at some points of the liquid outlet cannot obtain the two-dimensional and three-dimensional temperature field distribution data of the hydrothermal area
To sum up, the current main means of measuring the temperature of deep-sea hydrothermal vents cannot accurately measure the temperature field of hydrothermal fluids.
Therefore, 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 the temperature field of hydrothermal vents and provide quantitative temperature information.
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[0041] The principle and structure of the present invention will be further described below in conjunction with the accompanying drawings.
[0042] The temperature measuring device adopted in the method of the present invention is composed of a hydroacoustic transducer, a frame, cables and a data acquisition system. The underwater acoustic transducer installed on the frame is connected to the data acquisition system composed of the drive and preamplification cavity, the drive and preamplification cavity, the signal acquisition cavity and the battery cavity through cables.
[0043] Such as figure 1 Shown is the acoustic path and topology network diagram of the same layer plane. Place four hydroacoustic transducers on each side of the plane, and the four positions are at five equal points on each side. There are sixteen underwater acoustic transducers in such a plane.
[0044] The concrete steps of the inventive method are as follows:
[0045] Step (1), two layers of RHS-30 ...
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The invention relates to an in-situ on-line acoustic detection method for a deep-sea hydrothermal port temperature field. The conventional main means for deep-sea hydrothermal port temperature measurement cannot accurately measure the temperature field of hydrothermal fluid. The method comprises the following steps: firstly, using one underwater acoustic transducer of the same layer as a sound source to produce sound, and using the rest fifteen underwater acoustic transducers as receiving ends for receiving sound wave signals, thus calculating the sound wave propagation time on each path; then, calculating the average temperature value t of the sound wave propagation paths; and finally, rebuilding a seabed hydrothermal port temperature field, specifically dividing the plane into a plurality of grids, and calculating the average temperature in each grid by using a data chromatography reducing algorithm so as to obtain the temperature field. The method can overcome the defect of the conventional contact measurement by adopting non-contact in-situ measurement for the acoustic hydrothermal temperature field, and improve the accuracy of hydrothermal port heat flux measurement by performing continuous real-time measurement under the severe environment of high temperature, corrosion and multiple suspended grains.
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 the temperature field of a deep-sea hydrothermal vent. Background technique [0002] In-situ monitoring of the temperature field distribution of modern hydrothermal activities is one of the important contents in the study of hydrothermal activities, and it is also the basic research work for studying deep-sea hydrothermal vents and their surrounding deep biosphere, and exploring the mechanism of seafloor hydrothermal mineralization. The distribution of the temperature field is an important parameter for calculating the heat flux input into the ocean by the hydrothermal system. However, due to the extreme environment of high temperature and high pressure in the hydrothermal active area, the existing effective means and technologies for measuring the temperature of hydrothermal vents are very limited. Thermometers that can m...
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IPC IPC(8): G01K11/24
Inventor 陈鹰樊炜潘华辰毛洁蔡勇张祝军吴民忠吴友凤
Owner HANGZHOU DIANZI UNIV