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A Chloride Ion Concentration Sensor and Its Measuring System

A chlorine ion concentration and measurement system technology, applied in the field of photonic crystal fiber optic sensors, can solve the problems of a large number of instruments and equipment, limited number of ion carriers, complex chemical processes, etc., and achieve simple and compact structure, convenient multi-point distributed measurement, and high sensitivity Effect

Inactive Publication Date: 2016-03-23
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned sensing devices are mainly used in the analysis of chloride ion concentration of aqueous samples. The number of ionophores that can effectively select chloride ions in the chemical reactions involved is relatively limited, and most of the experimental schemes require a large number of instruments and equipment and complex procedures. Chemical Technology

Method used

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  • A Chloride Ion Concentration Sensor and Its Measuring System
  • A Chloride Ion Concentration Sensor and Its Measuring System
  • A Chloride Ion Concentration Sensor and Its Measuring System

Examples

Experimental program
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Effect test

Embodiment 1

[0025] see figure 1 , the chloride ion concentration measurement system includes: a chloride ion concentration sensor, the two ends of the chloride ion concentration sensor are respectively coupled with the 1550nm single-mode fiber jumper 2 by fusion splicing or adapter coupling, and through the 1550nm single-mode fiber jumper 2 Connect the tunable semiconductor laser light source 3 and the digital power meter 4 respectively, the tunable semiconductor laser light source 3 and the digital power meter 4 are respectively connected with the Labview control system 5, and the Labview (LaboratoryVirtualInstrumentEngineeringWorkbench) control system 5 controls the output wavelength of the tunable semiconductor laser light source 3 , and the wavelength center is at 1550 nm.

[0026] Wherein, the specific working principle and working process of the Labview control system 5 are well known to those skilled in the art, and will not be repeated in this embodiment of the present invention. ...

Embodiment 2

[0030] see figure 2 , another chloride ion concentration measurement system includes: several chloride ion concentration sensors to form a sensing array, and adjacent chloride ion concentration sensors are connected by 1550nm single-mode optical fiber jumpers (that is, both ends are fused or adapter-coupled) respectively coupled with 1550nm single-mode fiber jumper 2); the entire sensing array is connected to tunable fiber Fabry-Perot filter 6 and digital power meter 4 respectively through 1550nm single-mode fiber jumper 2, and the tunable fiber The Fabry-Perot filter 6 is connected to the isolator 7 and the ASE (Amplified Spontaneous Emission Broadband Light Source) 8 in turn; the tunable fiber Fabry-Perot filter 6 and the digital power meter 4 are respectively connected to the Labview control system 5 .

[0031] That is, long-period fiber gratings with different transmission loss peaks can be obtained by writing different grating constants, and these fiber gratings can be ...

Embodiment 3

[0034] see image 3 , another chloride ion concentration measurement system includes: several chloride ion concentration sensors, forming multiple parallel sensing arrays (for example: m parallel sensing arrays, equivalent to m channels), adjacent chloride ion concentration sensors pass through 1550 Nano-single-mode fiber jumper connection (that is, both ends are coupled with 1550-nm single-mode fiber jumper 2 by fusion splicing or adapter coupling); each sensing array is connected to the coupler through 1550-nm single-mode fiber jumper 2 9 and an optical switch coupling device 10 (wherein, the model selection of the coupler 9 and the optical switch coupling device 10 is determined by the number of channels, for example: the number of channels in this embodiment is m, and the coupler 9 is a coupler of m*1 , the optical switch coupling device 10 is a 1*m optical switch coupling device), the coupler 9 is connected to the Labview control system 5 through the digital power meter 4...

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Abstract

The present invention discloses a chlorine ion concentration sensor and a measurement system thereof. The chlorine ion concentration sensor comprises thin-walled pomelo type photon crystal optical fiber, wherein the material is pure quartz, a cladding diameter is 125+ / -5 mum, a cladding air hole diameter is 34.6 mum, a distance between air holes is 35.3 mum, a fiber core diameter is 12 mum, fiber core is doped with germanium, long period optical fiber grating with a transmission loss peak near 1550 nm is written into the fiber core to obtain thin-walled pomelo type photon crystal optical fiber grating, and chlorine ion solutions with different concentrations are filled into the cladding air holes of the thin-walled pomelo type photon crystal optical fiber grating. The chlorine ion concentration sensor has advantages of simple and compact structure, flexible design, high sensitivity, low cost and the like. According to the present invention, the full-optical fiber sensing mode is adopted, such that the whole system has characteristics of compact structure, easy integration and low cost, and is suitable for flexible application in the industrial field; and the appropriate wavelength division multiplexing technology and the appropriate space division multiplexing technology can be adopted to achieve optical fiber networking so as to easily achieve multi-point distributed measurement.

Description

technical field [0001] The invention relates to the field of photonic crystal fiber sensors, in particular to a chloride ion concentration sensor based on long-period photonic crystal fiber gratings and a measurement system thereof. Background technique [0002] The durability of reinforced concrete structures is one of the most concerned issues in fields such as public transportation and civil engineering. In practical application, the degradation of the durability of steel bars will cause the deterioration of the structural performance of the building, thereby shortening its service life and causing huge safety hazards. Especially in the marine environment, the erosion of chloride ions in seawater will directly affect the corrosion of steel bars in concrete, resulting in a decrease in its bearing capacity, and finally inevitably lead to structural collapse. The traditional chloride ion concentration monitoring method is mainly based on the principle of electrochemical rea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/59
Inventor 徐德刚王然徐伟姚建铨陆颖苗银萍
Owner TIANJIN UNIV
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