CN104990898A - Optical fiber tapering characteristic based system for detecting liquid refractive index in real time - Google Patents

Optical fiber tapering characteristic based system for detecting liquid refractive index in real time Download PDF

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Publication number
CN104990898A
CN104990898A CN201510445057.7A CN201510445057A CN104990898A CN 104990898 A CN104990898 A CN 104990898A CN 201510445057 A CN201510445057 A CN 201510445057A CN 104990898 A CN104990898 A CN 104990898A
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CN
China
Prior art keywords
optical fiber
plastic plate
refractive index
optical sensor
mode fiber
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Pending
Application number
CN201510445057.7A
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Chinese (zh)
Inventor
彭保进
付撒莱
戴欢欢
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Zhejiang Normal University CJNU
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Zhejiang Normal University CJNU
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Application filed by Zhejiang Normal University CJNU filed Critical Zhejiang Normal University CJNU
Priority to CN201510445057.7A priority Critical patent/CN104990898A/en
Publication of CN104990898A publication Critical patent/CN104990898A/en
Pending legal-status Critical Current

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Abstract

The invention discloses an optical fiber tapering characteristic based system for detecting liquid refractive index in real time. The system comprises a laser with a specific wavelength, an optical fiber sensor, a PIN tube, an amplification circuit, a collecting card, a computer, and a sample tank; wherein the optical fiber sensor is installed in the sample tank, the light with a specific wavelength is emitted by the laser and goes through the optical fiber sensor and PIN tube in sequence, then the signal detected by the PIN tube is processed by the amplification circuit and converted into an electrical signal, and the electrical signal is collected by the collecting card and then sent to the computer in the end. The optical fiber sensor is composed of a rectangular plastic plate and single mode fiber; the four angles of the plastic plate are all round angles, the single mode fiber is fixed on two round angles of the plastic plate through epoxy resin, and the contact positions between the plastic plate and the single mode fiber are melted to form a left cone area and a right cone area.

Description

A kind of system of drawing the real-time tracer liquid refractive index of cone characteristic based on optical fiber
Technical field
The present invention relates to a kind of liquid detecting system, be specifically related to a kind of system of drawing the real-time tracer liquid refractive index of cone characteristic based on optical fiber.
Background technology
On the factory lines of some drinks, dairy products, often need to carry out Real-Time Monitoring to the concentration of liquid, but due to its circumstance complication, influence factor is many, uses general sensor not reach required precision, and larger by external interference.And if factory adopts the mode of personal monitoring then can drop into a large amount of manpowers and material resources in tracer liquid concentration, is unfavorable for the development of industry.
The liquid of variable concentrations corresponds to different refractive indexes, as long as therefore realization is to the change of the measurement of liquid refractivity with regard to energy Real-Time Monitoring strength of fluid.Traditional refractive index measurement method is Abbe refractometer, but just no longer applicable for this method of opaque liquid, and also needs the step such as light, De-dispersion before using, can not Quick Measurement.And Fibre Optical Sensor has that volume is little, low, the quick response of weight device, cost and the performance such as corrosion-resistant, is therefore widely used in the measurement of various physics, chemical parameters, as temperature, stress, refractive index etc.Research at present about optic fibre refractive index sensor has many, but many just based on some theoretical researches, and due to it but complex manufacturing technology, cost is high, is not generalized in actual application.So present stage lack be a kind of energy fast, system that is convenient, accurately tracer liquid concentration.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of energy system of drawing the real-time tracer liquid refractive index of cone characteristic based on optical fiber that is quick, convenient, accurately tracer liquid concentration.
The present invention is achieved through the following technical solutions: a kind of system of drawing the real-time tracer liquid refractive index of cone characteristic based on optical fiber of the present invention, described system comprises the laser instrument of specific wavelength, Fibre Optical Sensor, PIN manages, amplifying circuit, capture card, computing machine and sample cell to be detected, described Fibre Optical Sensor is arranged in sample cell, described laser instrument sends the light of specific wavelength successively by Fibre Optical Sensor and PIN pipe, the signal detected from PIN pipe again becomes electric signal through the process of amplifying circuit, and utilize capture card collection, finally transfer to computing machine,
Wherein, described Fibre Optical Sensor is made up of the plastic plate of one piece of rectangle and single-mode fiber, four angles of described plastic plate are fillet, described single-mode fiber is fixed on two fillets of described plastic plate by epoxide-resin glue, and described single-mode fiber passes through melting Xing Zuochengzhui district and You Zhui district at two fillet places.
The invention has the beneficial effects as follows: the output intensity of sensor under the light of a certain specific wavelength drawing cone characteristic to be made based on optical fiber has obvious change along with the change of refractive index, by PIN pipe, the light signal of change is converted into electric signal, regulate the enlargement factor of amplifying circuit, and by the VB program in the data acquisition of capture card and computing machine, the corresponding relation of different refractivity and output voltage can be obtained, the present invention utilizes optical fiber to draw cone characteristic, in conjunction with photoelectric technology and computer technology, made detection system safety and environmental protection, simple to operate, effective.
Accompanying drawing explanation
For ease of illustrating, the present invention is described in detail by following specific embodiment and accompanying drawing.
Fig. 1 is a kind of schematic diagram drawing the system of the real-time tracer liquid refractive index of cone characteristic based on optical fiber of the present invention;
Fig. 2 is the structural representation of Fibre Optical Sensor.
Embodiment
As depicted in figs. 1 and 2, a kind of system of drawing the real-time tracer liquid refractive index of cone characteristic based on optical fiber of the present invention, described system comprises the laser instrument of specific wavelength, Fibre Optical Sensor, PIN pipe, amplifying circuit, capture card, computing machine and sample cell to be detected, described Fibre Optical Sensor is arranged in sample cell, described laser instrument sends the light of specific wavelength successively by Fibre Optical Sensor and PIN pipe, the signal detected from PIN pipe again becomes electric signal through the process of amplifying circuit, and utilize capture card collection, finally transfer to computing machine;
Wherein, described Fibre Optical Sensor is made up of the plastic plate 1 of one piece of rectangle and single-mode fiber 5, four angles of described plastic plate 1 are fillet, described single-mode fiber 5 is fixed on two fillets of described plastic plate 1 by epoxide-resin glue 4, and described single-mode fiber 5 passes through melting Xing Zuochengzhui district 2 and You Zhui district 3 at two fillet places.
The invention has the beneficial effects as follows: the output intensity of sensor under the light of a certain specific wavelength drawing cone characteristic to be made based on optical fiber has obvious change along with the change of refractive index, by PIN pipe, the light signal of change is converted into electric signal, regulate the enlargement factor of amplifying circuit, and by the VB program in the data acquisition of capture card and computing machine, the corresponding relation of different refractivity and output voltage can be obtained, the present invention utilizes optical fiber to draw cone characteristic, in conjunction with photoelectric technology and computer technology, made detection system safety and environmental protection, simple to operate, effective.
The above, be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any change of expecting without creative work or replacement, all should be encompassed within protection scope of the present invention.Therefore, the protection domain that protection scope of the present invention should limit with claims is as the criterion.

Claims (1)

1. draw a system for cone characteristic real-time tracer liquid refractive index based on optical fiber, it is characterized in that: described system comprises the laser instrument of specific wavelength, Fibre Optical Sensor, PIN pipe, amplifying circuit, capture card, computing machine and sample cell to be detected; Described Fibre Optical Sensor is arranged in sample cell, described laser instrument sends the light of specific wavelength successively by Fibre Optical Sensor and PIN pipe, the signal detected from PIN pipe again becomes electric signal through the process of amplifying circuit, and utilizes capture card collection, finally transfers to computing machine;
Wherein, described Fibre Optical Sensor is made up of the plastic plate of one piece of rectangle and single-mode fiber, four angles of described plastic plate are fillet, described single-mode fiber is fixed on two fillets of described plastic plate by epoxide-resin glue, and described single-mode fiber passes through melting Xing Zuochengzhui district and You Zhui district at two fillet places.
CN201510445057.7A 2015-07-27 2015-07-27 Optical fiber tapering characteristic based system for detecting liquid refractive index in real time Pending CN104990898A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510445057.7A CN104990898A (en) 2015-07-27 2015-07-27 Optical fiber tapering characteristic based system for detecting liquid refractive index in real time

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510445057.7A CN104990898A (en) 2015-07-27 2015-07-27 Optical fiber tapering characteristic based system for detecting liquid refractive index in real time

Publications (1)

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CN104990898A true CN104990898A (en) 2015-10-21

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108872150A (en) * 2017-05-12 2018-11-23 武汉工程大学 A kind of dual wavelength gain competition apparatus for measuring refractive index
CN110006846A (en) * 2019-04-19 2019-07-12 哈尔滨工程大学 A kind of the trace quantity liquid refractivity measuring device and preparation method of V-type special optical fiber

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104154883A (en) * 2014-07-23 2014-11-19 中国计量学院 Inclination angle measuring sensor based on fused biconical taper structure of inclined fiber bragg grating
CN204855373U (en) * 2015-07-27 2015-12-09 浙江师范大学 System based on optic fibre draws awl characteristic real -time detection liquid refracting index

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104154883A (en) * 2014-07-23 2014-11-19 中国计量学院 Inclination angle measuring sensor based on fused biconical taper structure of inclined fiber bragg grating
CN204855373U (en) * 2015-07-27 2015-12-09 浙江师范大学 System based on optic fibre draws awl characteristic real -time detection liquid refracting index

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
QINGGUO SHI等: "A new refractive index sensor based on Mach-Zehnder interferometer fabricated by two cascaded by two cascaded Single-mode fiber corners", 《PROC.OF SPIE》 *
张娜: "光纤传感器液体浓度检测系统的研究", 《中国优秀博硕士学位论文全文数据库(硕士),信息科技辑》 *
熊贻坤等: "基于熔融拉锥光纤的液体折射率传感器", 《光学学报》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108872150A (en) * 2017-05-12 2018-11-23 武汉工程大学 A kind of dual wavelength gain competition apparatus for measuring refractive index
CN110006846A (en) * 2019-04-19 2019-07-12 哈尔滨工程大学 A kind of the trace quantity liquid refractivity measuring device and preparation method of V-type special optical fiber

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Application publication date: 20151021