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Chlorine ion concentration sensor and measurement system thereof

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

Inactive Publication Date: 2013-12-11
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • Chlorine ion concentration sensor and measurement system thereof
  • Chlorine ion concentration sensor and measurement system thereof
  • Chlorine ion concentration sensor and measurement system thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] 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 1550-nanometer single-mode fiber jumper 2 by welding or adapter coupling, and through the 1550-nanometer single-mode fiber jumper 2 are respectively connected to the tunable semiconductor laser light source 3 and the digital power meter 4, the tunable semiconductor laser light source 3 and the digital power meter 4 are respectively connected to the Labview control system 5, and the Labview (Laboratory Virtual Instrument Engineering Workbench) control system 5 controls the tunable semiconductor laser The light source 3 outputs a wavelength, and the center of the wavelength is 1550 nm.

[0022] Wherein, the specific working principle and working process of the Labview control system 5 are well known to those skilled in the art, which will not be repeated in this embodiment of...

Embodiment 2

[0026] 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 1550 nm single-mode fiber jumpers (that is, both ends are coupled by fusion or adapter). are coupled with 1550nm single-mode fiber jumper 2 respectively); the entire sensing array is connected to the tunable fiber Fabry-Polo filter 6 and the digital power meter 4 through the 1550nm single-mode fiber jumper 2, respectively, and the tunable fiber The Fabry-Polo filter 6 is connected to the isolator 7 and the ASE (amplified spontaneous emission broadband light source) 8 in turn; the tunable fiber Fabry-Polo filter 6 and the digital power meter 4 are respectively connected to the Labview control system 5 .

[0027] That is, long-period fiber gratings with different transmission loss peaks can be obtained by writing different grating constants, and these fiber grat...

Embodiment 3

[0030] see image 3 , another chloride ion concentration measurement system includes: several chloride ion concentration sensors, forming a plurality of 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 means of fusion splicing or adapter coupling); each sensing array is connected to the coupler through 1550 nm single-mode fiber jumper 2 respectively 9 and the 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, then the coupler 9 is an m*1 coupler , the optical switch coupling device 10 is an optical switch coupling device of 1*m), the coupler 9 is connected to the Labview control system 5 t...

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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 the fields of public transportation and civil engineering. In practical applications, 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 a huge safety hazard. Especially in the marine environment, the corrosion 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 leading to structural collapse. The traditional chloride ion concentration monitoring method is mainly based on the principle of electrochemical reaction...

Claims

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Application Information

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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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