Device and method for testing fiber bragg grating corrosion and liquid refractive index

A technology of liquid refractive index and optical fiber grating, which is applied in the direction of measuring devices and instruments, can solve the problems of expensive micro-nano optical fiber drawing system and complexity, and achieve the effect of low production cost, simple structure and convenient use

Active Publication Date: 2015-08-26
西安长泽石化科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In contrast, although the former can maintain the strong mechanical flexibility of micro-nano fiber gratings, it requires a complex and expensive micro-nano fiber drawing system

Method used

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  • Device and method for testing fiber bragg grating corrosion and liquid refractive index
  • Device and method for testing fiber bragg grating corrosion and liquid refractive index
  • Device and method for testing fiber bragg grating corrosion and liquid refractive index

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Embodiment Construction

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are implemented on the basis of existing technical solutions, but the present invention is not limited to the following embodiments.

[0030] Such as figure 1 As shown, a fiber grating corrosion and liquid refractive index testing device includes a support frame 1 and a cross bar 2 on the support frame; The inner wall and the outer wall of the tube at the upper and lower ends of the side are provided with a through hole a17 and a through hole b18, and a columnar tube a4 and a columnar tube b5 are arranged in the through hole a17 and the through hole b18; The lower end is provided with a through hole c19 and a through hole d20, and the through hole c19 and the through hole d20 are respectively provided with a columnar tube c6 and a columnar tube d7; a temperature sensor 9 is provided in the c...

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Abstract

A device for testing fiber bragg grating corrosion and liquid refractive index comprises a working container, an adjustable constant-temperature water domain controller, a fiber bragg grating wavelength detector, a temperature detector and a support frame. The method, further provided by the invention, for testing the fiber bragg grating corrosion and liquid refractive index comprises the following steps: 1) passing a fiber bragg grating through the working container to be connected with the fiber bragg grating wavelength detector; 2) vertically fixing the working container on the support frame, connecting a fiber bragg grating tail fiber with the fiber bragg grating wavelength detector, connecting the temperature detector with the adjustable constant-temperature water domain controller, and connecting the working container with the adjustable constant-temperature water domain controller; 3) injecting a carbon tetrachloride solution in the working container till the liquid surface reaches the lower limit position of a corrosion area; injecting hydrofluoric acid till the liquid surface reaches the upper limit position of a to-be-corroded area; finally injecting liquid paraffin; 4) using the fiber bragg grating wavelength detector to monitor the change of reflection wavelength of the fiber bragg grating, performing acid-base neutralization after corroding, and cleaning; 5) filling an inner pipe with a to-be-detected liquid, recording the drift distance of the fiber bragg grating wavelength, and calculating the liquid refractive index according to a scaling relation; the device is simple in structure, and accurate in measurement.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, and in particular relates to an optical fiber Bragg grating corrosion and liquid refractive index testing device. The device has automatic temperature adjustment and compensation functions, can be used to make a micro-nano fiber grating refractive index sensor, and realize accurate measurement of liquid refractive index and thermo-optic coefficient. Background technique [0002] With the development of optical fiber technology, new optoelectronic devices based on fiber gratings are widely used in the field of optical communication and sensing, which not only expands the functions of modern communication devices, but also has unprecedented development in the field of sensing. Due to its miniaturization, multi-functionality and easy network characteristics, the sensor based on fiber grating has played a huge role in various fields of sensing and detection, and it also has potential d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02
Inventor 刘颖刚贾振安傅海威韩党卫车伏龙
Owner 西安长泽石化科技有限公司
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