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Multifunctional marine environment monitoring device based on distributed optical fiber sensing and method

A technology of marine environment monitoring and distributed optical fiber, which is applied in the direction of measuring devices, analysis materials, specific gravity measurement, etc., and can solve problems such as application limitations

Active Publication Date: 2016-02-03
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

However, the above-mentioned current meters are all discrete devices, which have limitations in application.

Method used

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  • Multifunctional marine environment monitoring device based on distributed optical fiber sensing and method
  • Multifunctional marine environment monitoring device based on distributed optical fiber sensing and method
  • Multifunctional marine environment monitoring device based on distributed optical fiber sensing and method

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Embodiment Construction

[0035] Specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0036] The present invention is based on the following principles:

[0037] Fiber Brillouin frequency shift ν B It is related to the temperature T and strain ε along the fiber, and the Brillouin frequency shift variation Δν B It is proportional to the temperature change ΔT and the strain change Δε, that is:

[0038] Δν B =C T ΔT(2)

[0039] Δν B =C ε Δε(3) where C T and C ε are the coefficients of Brillouin frequency shift with temperature T and strain ε, respectively.

[0040] The fiber strain ε has the following relationship with the pressure P on the fiber:

[0041] ϵ = P E - - - ( 4 )

[0042] Where E is the Young's modulus of the fiber.

[0043] When the optical fiber is located below the...

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Abstract

The invention relates to the field of oceanographic parameter monitoring and optical fiber sensing, and in particular refers to a multifunctional marine environment monitoring device based on a distributed optical fiber sensing technology and a method. The device consists of a sea platform, a distributed optical fiber sensing system, a cable winding tray, a cable and an anchor body. According to the invention, distributed, multi-parameter, real-time and reliable marine environment monitoring is realized; the device and the method are applied to the field of marine environment monitoring; temperature, depth and density of seawater of different hydrology levels and sea current velocity can be measured at the same time.

Description

technical field [0001] The invention relates to the field of marine hydrological parameter monitoring and optical fiber sensing, in particular to a multifunctional marine environment monitoring device and method based on distributed optical fiber sensing technology. Background technique [0002] Long-term, continuous, and fixed-point observation of the marine hydrological environment, especially the real-time monitoring of a series of marine hydrological parameters such as seawater temperature, seabed depth, seawater density, and ocean current velocity, is a difficult, complicated and significant task that has always been sought by people. Pay attention to. At present, the monitoring of seawater temperature and depth is mainly realized by discrete temperature and depth sensors, and the monitoring of sea current velocity is mainly realized by sea current meters. These devices are all discrete devices. To realize the monitoring of hydrological parameters at various points in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32G01C13/00G01N9/00G01P5/00G01K11/322
Inventor 陈伟孟洲张学亮宋章启熊水东胡晓阳
Owner NAT UNIV OF DEFENSE TECH
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