Quasi-distributed sea water temperature salinity sensor, measuring device and method thereof

A sensor and seawater technology, applied in the direction of measuring devices, using optical devices to transmit sensing components, instruments, etc., can solve the problem of not being able to measure the temperature and salinity of seawater at multiple points at the same time, and improve the traditional measurement scheme, The effect of low loss characteristics and simple structure

Active Publication Date: 2017-07-07
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0008] In view of the above-mentioned defects of the prior art devices, the present invention provides a quasi-distributed seawater temperature and salin

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  • Quasi-distributed sea water temperature salinity sensor, measuring device and method thereof
  • Quasi-distributed sea water temperature salinity sensor, measuring device and method thereof
  • Quasi-distributed sea water temperature salinity sensor, measuring device and method thereof

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[0053] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0054] figure 1 The structural diagram of the quasi-distributed seawater temperature and salinity sensor provided by the present invention, the seawater temperature and salinity sensor includes an optical fiber 11, and the protective sleeve 12 is placed outside the optical fiber 3 through packaging to strengthen the strength of the optical fiber 11. The protective sleeve 12 is A transparent heat-shrinkable tube with a diameter of 0.6mm, and the head and tail of the protective sleeve 12 are fixed to the optical fiber 11 through heat shrinkage. A plurality of sensing areas 111 and a plurality of non...

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Abstract

The invention discloses a quasi-distributed sea water temperature salinity sensor, a measuring device and a method thereof. The sea water temperature salinity sensor is an optical fiber. A number of sensing areas and non-sensing areas are arranged on the optical fiber. Each sensing area comprises a weak grating combination of LPG and FBG. LPG is sensitive to salinity and temperature, and produces power loss with the amplitude related to salinity and temperature for backscattered light. FBG is only sensitive to temperature, and produces power enhancement with the amplitude related to temperature for backscattered light. Single-wavelength pulse laser is input into the optical fiber. A backscattered light signal returned by the optical fiber is detected. The backscattered light signal is demodulated to acquire the sea water temperature and salinity detected by each sensing area. The sea water temperature value and the salinity value of multiple points are measured at the same time. The demodulation step is simple. According to the invention, LPG and FBG are optimized by writing parameters; the loss is low; and cascade long-distance quasi-distributed sea water temperature salinity detection is realized.

Description

technical field [0001] The invention relates to the technical field of seawater salinity and temperature detection, and more specifically, to a quasi-distributed seawater temperature and salinity sensor, a measuring device and a method thereof. Background technique [0002] Seawater salinity is a scale of the salinity of seawater, and it and temperature are important characteristics of seawater. Many physical and chemical phenomena in the ocean are related to the distribution and variation of ocean salinity and temperature. In recent years, the detection technology of seawater environment has received extensive attention. This technology is of great significance in the fields of maritime defense and military affairs, marine science, oil exploration, fishery production, and marine environmental protection. [0003] In ocean water, changes in salinity are mainly related to factors such as seawater evaporation, rainfall, ocean currents, and seawater mixing. The salinity of sur...

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Application Information

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IPC IPC(8): G01D21/02G01D5/353
Inventor 闫志君孙琪真汪静逸艾凡刘德明
Owner HUAZHONG UNIV OF SCI & TECH
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