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Air salinity monitoring method and device based on coreless optical fiber inner cavity sensing

A coreless optical fiber and monitoring device technology, which is applied to the measurement of phase influence characteristics, etc., can solve the problems of inability to perform real-time and rapid monitoring, many manual participation links, and large error in measurement results, so as to overcome complicated measurement steps, suppress mode competition, The effect of reducing the impact

Inactive Publication Date: 2016-06-15
TIANJIN UNIV
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Problems solved by technology

The disadvantage of this method is that the measurement steps are complicated, there are many manual participation links, and the measurement results have large errors, and this method cannot be used for real-time and rapid monitoring.

Method used

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  • Air salinity monitoring method and device based on coreless optical fiber inner cavity sensing
  • Air salinity monitoring method and device based on coreless optical fiber inner cavity sensing
  • Air salinity monitoring method and device based on coreless optical fiber inner cavity sensing

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[0040] (1) Firstly, calibrate the sensing device according to the known air salinity. The specific calibration method is as follows: the air salinity value mainly depends on the content of sulfate, nitrate, chloride and other salts in the atmospheric moisture. Generally, the air salinity in coastal areas is 0%. Take the air in the coastal area of ​​the location, and prepare multiple groups of air with corresponding salinity by evaporating brine with different salinity, and define the air salinity value in the coastal area of ​​the location as 0%. Then the sensor 6 is sequentially placed in the prepared air with different salinity values, the optical spectrum analyzer (OSA) 8 records the air with different salinity values, and outputs the peak wavelength of the laser. Finally, the peak wavelength-air salinity curve equation is fitted by using the obtained multiple sets of air salinity values ​​and corresponding peak wavelengths. Since this calibration method belongs to referen...

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Abstract

The invention belongs to marine environment air salinity monitoring and evaluating in the field of atmospheric environmental monitoring, and provides an inner cavity sensor device and method based on a coreless optical fiber. High-precision all-weather monitoring on marine environment air salinity is achieved. According to the technical scheme, according to an air salinity monitoring method and device based on coreless optical fiber inner cavity sensing, a pumping source is included and coupled with a light inlet path through one input end of a wavelength division multiplexer (WDM), the wavelength division multiplexer (WDM) is provided with two input paths and an output path, the output end is connected with an Er-doped fiber (EDF), the output end of the Er-doped fiber (EDF) is connected with the input end of a fiber optic isolator (ISO), and the output end of the fiber optic isolator (ISO) is connected with a sensor; a coupler is provided with one input path and two output paths, the output ends are connected an optical spectrum analyzer (OSA) and the other input end of the wavelength division multiplexer (WDM), and an annular cavity is formed. The device and method are mainly applied to marine environment air salinity monitoring and evaluating.

Description

technical field [0001] The invention belongs to the monitoring and evaluation of marine environment air salinity in the field of atmospheric environment monitoring, and relates to a marine environment air salinity monitoring device and a sensing method, in particular to an air salinity monitoring method based on coreless optical fiber inner cavity sensing and device. Background technique [0002] Air salinity is defined as the mass of all salts such as sulfate, nitrate, and chloride dissolved in water vapor in a unit volume of air. Air salinity is an important indicator for judging air quality, especially for the monitoring of air salinity in marine environments dominated by oceans and coastal areas, and is of great significance to marine operations and the health of residents in coastal areas. The air in the ocean and coastal areas, due to the unique high humidity of the marine environment and a series of ocean effects, causes a large amount of water vapor in the air of th...

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Application Information

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IPC IPC(8): G01N21/41
CPCG01N21/41
Inventor 徐德刚冯佳琛石嘉王与烨苏耿华闫超严德贤姚建铨
Owner TIANJIN UNIV
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