Sea ice thickness measurement system

A thickness measurement and height technology, which is used in electrical/magnetic thickness measurement, electromagnetic measurement devices, etc., can solve the problems of limited observation accuracy and no commercial products of electromagnetic induction ice thickness detection equipment.

Inactive Publication Date: 2009-07-08
POLAR RES INST OF CHINA
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Problems solved by technology

[0005] Underwater upward-looking sonar technology is a classic method of ice thickness observation. The upward-looking sonar equipment is mounted on a submarine or underwater robot platform to obtain sea ice thickness data, which is widely used by scientists. However, this technology The observation accuracy is limited by the position of the underwater transducer and the influence of changes in water temperature, tide and air pressure;
[0006] Electromagnetic induction technology, which has the advantages of non-contact and fast working speed, but there is no commercial product of electromagnetic induction ice thickness detection equipment so far

Method used

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Embodiment 1

[0026] figure 2 One embodiment of the method of measuring sea ice thickness of the present invention is shown.

[0027] The basis for applying the principle of electromagnetic induction to the measurement of sea ice thickness is that there is a significant difference between the conductivity of sea ice and that of seawater, that is, the conductivity of sea ice ranges from 0 to 300 mS / m, while the conductivity of seawater usually ranges from 0 to 300 mS / m. Between 2000 and 3000mS / m. The transmitting coil of the electromagnetic induction sensor generates a low-frequency magnetic field (primary field), which causes the sea ice to induce eddy current, and the eddy current field causes the secondary magnetic field to be detected by the receiving coil. Since the sea ice layer is high resistivity and the seawater layer is low resistivity and the resistivity ratio of the two is relatively large, the position of the interface between the two can be calculated more accurately when the...

Embodiment 2

[0035] Figure 4 Another embodiment of the invention is shown, which relates to another method of measuring sea ice thickness. This method mainly uses figure 1 Sonar 102 and laser 103 are shown. According to this embodiment, the sea ice thickness measurement system 401 should at least include a sonar 102 and a laser 103 . go to Figure 4, as in Embodiment 1, the sea ice thickness measurement system 401 of the present invention, that is, the sonar 102 and the laser 103, is fixed above the sea ice. In the same manner as in Embodiment 1, the height H1 of the seawater surface from the system 401 and the height H2 of the upper surface of sea ice from the system 401 can be measured with the sonar 102 . At the same time, the laser 103 can also be used to measure the height H1 of the seawater surface from the system 401 and the height H2 of the upper surface of sea ice from the system 401 in a similar manner, and the ice side height H can be obtained by calculating H1-H2. Then, u...

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Abstract

The invention provides a sea ice thickness measuring system, which comprises a body, wherein the body comprises an electromagnetic inductor, a sonar device and a control unit, wherein the electromagnetic inductor is perpendicular to sea ice and transmits and receives electromagnetic field signals; the sonar machine is perpendicular to the sea ice and transmits and receives sonar signals; and the control unit is in data connection with the electromagnetic inductor and the sonar machine, calculates a first height of an interface between the body and the sea ice and seawater according to the electromagnetic field signals of the electromagnetic inductor, calculates a second height between the body and the upper surface of the sea ice according to the sonar signals, and acquires the thickness of the sea ice by subtracting the second height from the first height. The invention correspondingly provides a method for measuring the thickness of the sea ice. The system and the method for measuring the thickness of the sea ice realize repeated continuous shipboard observation of the large-range sea ice and can precisely measure the thickness of the sea ice.

Description

technical field [0001] The invention relates to the field of ocean monitoring, in particular to a novel sea ice thickness measurement system and a method for realizing sea ice thickness measurement using the system. Background technique [0002] The thickness of sea ice and its variation is a frontier hotspot and technical difficulty in the field of global change research, and scientists from various countries are working hard to find technical methods to solve this problem. [0003] Sea ice thickness is particularly significant and sensitive to the coupling process of atmosphere-sea ice-ocean, and directly determines the exchange process and rate of sea-air energy and matter; dominates the thermodynamic and dynamic characteristics of sea ice, and affects the movement of sea ice , deformation and freezing and ablation process. At present, the following centralized sea ice thickness monitoring technologies mainly exist: [0004] Satellite remote sensing technology. With the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/06
Inventor 郭井学孙波李丙瑞李娜唐学远李群
Owner POLAR RES INST OF CHINA
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