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Reflective fiber sensor for simultaneous measurement of seawater salinity and temperature

A fiber optic sensor and seawater salt technology, which is applied in the direction of transmitting sensing components, converting sensor output, thermometers, etc. by using optical devices, can solve problems such as unsatisfactory performance, inability to use long-distance transmission, complicated sensor production, etc., and achieve low cost , The preparation process is simple, and the effect of reducing the impact

Inactive Publication Date: 2018-12-07
NORTHEASTERN UNIV LIAONING
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  • Application Information

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Problems solved by technology

In 2018, WANG Y et al [Wang Y, Huang Q, Zhu W, et al. Novel optical fiber SPR temperature sensor based on MMF-PCF-MMF structure and gold-PDMS film [J]. Optics Express, 2018, 26( 2): 1910-1917.] Proposed a fiber optic temperature sensor based on photonic crystal fiber structure and PDMS, the measurement sensitivity reached -1.51nm / ℃, and the measurement stability was good, but this sensor was complicated to manufacture and could not be used for long-distance transmission
Most critically, the performance of current sensors for the simultaneous measurement of refractive index and temperature has not yet reached the ideal level

Method used

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  • Reflective fiber sensor for simultaneous measurement of seawater salinity and temperature
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  • Reflective fiber sensor for simultaneous measurement of seawater salinity and temperature

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Embodiment Construction

[0018] In order to make the object, technical solution and advantages of the present invention clearer, the specific structure, principle and working process of the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0019] Such as figure 1 Shown is a reflective optical fiber sensor for simultaneous measurement of seawater salinity and temperature proposed by the present invention. Its working process is as follows: the light emitted by the halogen light source 1 is first transmitted to the multimode fiber 21 through the Y-shaped fiber 2 and then enters the single-mode fiber 22, and then reflected at the end face of the single-mode fiber 22 at 23 and then enters the Y-shaped fiber 2 and is transmitted to the spectrometer 4 Monitor the amount of spectral shift. Among them, the multimode fiber 21 and the single-mode fiber 22 are fused by a fusion splicer. The length of the single...

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Abstract

The invention belongs to the technical field of fiber sensing and discloses a reflective fiber sensor for simultaneous measurement of seawater salinity and the temperature. The sensor comprises a halogen light source, a Y-type fiber, a sensing unit, a spectrometer and a host computer, wherein the halogen light source is connected with the sensing unit through a branch of the Y-type fiber, the sensing unit is connected with the spectrometer through another branch of the Y-type fiber, the spectrometer is connected with the host computer, the sensing unit is formed by a multi-mode fiber and a single-mode fiber which are cascaded, the multi-mode fiber and the single-mode fiber are coaxially welded, an outer surface and an end surface of the single-mode fiber are plated with a gold film, and outer periphery of the gold film is plated with a temperature sensitive film from a welding end of the single-mode fiber to the half-length position of the single-mode fiber. The sensor is advantaged inthat not only can simple manufacturing process, low cost and stable structure be achieved, but also, through simultaneous measurement of seawater salinity and the temperature, influence of the temperature on seawater salinity measurement accuracy can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing and relates to a reflective optical fiber sensor for simultaneous measurement of seawater salinity and temperature. Background technique [0002] Seawater salinity and temperature are the most basic parameters of the seawater equation of state, which are crucial to climate models, affect the survival of organisms in the ocean, and have a special effect on climate regulation. activities, marine traffic, marine productivity and fishery production [Nguyen L V, Vasiliev M, Alameh K. Three-wave fiber Fabry–Pérot interferometer for simultaneous measurement of temperature and water salinity of seawater[J].IEEEPhoton.Technol.Lett .,2011,23(7):450-452.]. Optical fiber sensing technology is a new technology that uses light as a carrier and optical fiber as a medium to sense and propagate changes in the external environment. When the light wave is transmitted in the optical fiber, the charact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02G01D5/26G01K11/32G01N21/25
CPCG01D5/268G01D21/02G01K11/32G01N21/25
Inventor 张亚男鄂思宇赵勇
Owner NORTHEASTERN UNIV LIAONING
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