CN207571012U - A kind of optical fiber hypersensor of measurable liquid quality and humidity - Google Patents

A kind of optical fiber hypersensor of measurable liquid quality and humidity Download PDF

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Publication number
CN207571012U
CN207571012U CN201721459711.0U CN201721459711U CN207571012U CN 207571012 U CN207571012 U CN 207571012U CN 201721459711 U CN201721459711 U CN 201721459711U CN 207571012 U CN207571012 U CN 207571012U
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China
Prior art keywords
optical fiber
single mode
mode optical
humidity
light
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Expired - Fee Related
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CN201721459711.0U
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Chinese (zh)
Inventor
帅少杰
沈常宇
孙志强
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China Jiliang University
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China Jiliang University
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Abstract

The utility model discloses a kind of measurable liquid quality and the optical fiber hypersensor of humidity, by wideband light source, the first single mode optical fiber, butterfly cone, the second single mode optical fiber, spectrometer composition.The light that wideband light source is sent out enters the first single mode optical fiber by Transmission Fibers, forward light by after the first single mode optical fiber by dislocation at, light at this time is divided into the light that two beams are propagated in fibre core and the light propagated in covering, two-beam proceeds at butterfly cone and is coupled into fibre core again, it then proceedes to form interference at propagated forward to dislocation again, final light beam by Transmission Fibers after the second single mode optical fiber by entering spectrometer.When humidity and liquid quality is measured, with the variation of humidity or the liquid quality for remaining in sensing unit, lead to the variation of the bending degree of optical fiber, the signal finally changed in spectrometer.

Description

A kind of optical fiber hypersensor of measurable liquid quality and humidity
Technical field
The utility model belongs to technical field of optical fiber sensing, and in particular to a kind of measurable liquid quality and the optical fiber of humidity Hypersensor technical field.
Background technology
Compared to traditional electronics humidity sensor, light fibre humidity transducer has some unique advantages, such as:Structure Compact, smaller volume, lighter weight, completely immune for extraneous complicated electromagnetic environment, corrosion resistance is stronger, can be with Easily realize long-range monitoring.
General light fibre humidity transducer mainly by the surface of optical fiber sensing structure apply be covered with humidity sensing film come It realizes and outer moisture variation is detected, referred in few documents and carry out humidity sensor without using sensitive membrane.
Between several grams to several kilograms, the rare measurement quality that is related to is the range of existing most fibre optical sensor mass metering The fibre optical sensor of milligram rank.
Invention content
In view of the deficiencies of the prior art, the purpose of this utility model is to provide a kind of measurable liquid quality and humidity Optical fiber hypersensor is detected humidity by observing the variation of peak value when measuring humidity, when measuring liquid quality It is detected by the intensity value for the trough for observing and recording spectrum come the quality to sensing unit, which is easily integrated, convenient for reality It is existing.
The utility model is achieved through the following technical solutions:A kind of measurable liquid quality and the optical fiber hypersensitive of humidity pass Sensor, by wideband light source(1), the first single mode optical fiber(2), butterfly cone(3), the second single mode optical fiber(4), spectrometer(5)Composition, It is characterized in that:Wideband light source(1)With the first single mode optical fiber(2)Left end connected by Transmission Fibers, the first single mode optical fiber(2)'s Right end is bored with butterfly(3)Left end pass through heat sealing machine dislocation welding, butterfly cone(3)Right end and the second single mode optical fiber(4)A left side End passes through heat sealing machine dislocation welding, the second single mode optical fiber(4)Right end and spectrometer(5)It is connected by Transmission Fibers.
The butterfly cone(3)Bore a diameter of 80 microns of area, cone section length be 95 microns, a diameter of the 40 of center bead Micron.
First single mode optical fiber(2)Right end and butterfly bore(3)Left end pass through heat sealing machine dislocation welding, magnitude of misalignment It is 9 microns.
The butterfly cone(3)Right end and the second single mode optical fiber(4)Left end pass through heat sealing machine dislocation welding, magnitude of misalignment It is 9 microns.
The operation principle of the utility model is:Wideband light source(1)The light sent out enters the first single-mode optics by Transmission Fibers It is fine(2), forward light passes through the first single mode optical fiber(2)Afterwards by dislocation at, light at this time is divided into what two beams were propagated in fibre core Light and the light propagated in covering, two-beam proceed to butterfly cone(3)Place is coupled into fibre core again, to biography before then proceeding to It casts to and forms interference at dislocation again, final light beam passes through the second single mode optical fiber(4)Enter spectrometer by Transmission Fibers afterwards (5).
When specific environment works, due to the increase of humidity, the moisture adsorbed on optical fiber increases, butterfly cone(3) Peripheral region is bent, and the condition of optical fiber internal interference is changed, finally in spectrometer(5)In the signal that is changed.By spectrum Peak value and the data of relative humidity be fitted, obtain relational expression:
(1)
Wherein goodness of fit R2=0.9503, illustrate that the fitting effect of relational expression is fine, can use.It will detect at this time To spectrum peak strength substitute into relational expression with regard to corresponding relative air humidity can be calculated.Relative humidity detection range is 50%-85%。
It when liquid quality is measured, uniformly drips toward sensing unit, allows the moisture for staying in sensing unit with time nature Evaporation, optical fiber, with time change, are observed and recorded variation of the spectrum with the time, are made time and light by the degree that moisture is bent Compose the relational graph of trough intensity.In addition using the quality of the water of electronic balance weighing equivalent, and moisture is recorded as the time evaporates Mass figures, make relational graph.The result of the two is combined finally obtain the quality for remaining in sensing unit and spectrum it Between relational expression
(2)
Wherein the goodness of fit is R2=0.9867, sensor can measure the sensing unit residual liquid quality of 0 ~ 25mg.
The beneficial effects of the utility model are:The sensor taken is the scheme of no plated film, sensitivity 0.075 (db/%RH), it has been more than the article An delivered by Khijwania S K, Srinivasan K L, Singh J P evanescent-wave optical fiber relative humidity sensor with enhanced The sensor of plated film in sensitivity.It is proposed for light fibre humidity sensing in no plated film new practical Scheme, while can also carry out milligram rank liquid quality sensing, it is simple and practicable, it is convenient and reliable.
Description of the drawings
Fig. 1 is the system construction drawing of a kind of measurable liquid quality and the optical fiber hypersensor of humidity.
Fig. 2 is the measurement humidity spectrogram of a kind of measurable liquid quality and the optical fiber hypersensor of humidity.
Fig. 3 is a kind of fitted figure of the measurement humidity of measurable liquid quality and the optical fiber hypersensor of humidity.
Fig. 4 is a kind of fitted figure of the measurement quality of measurable liquid quality and the optical fiber hypersensor of humidity.
Specific embodiment
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
Referring to attached drawing 1,2,3,4, the optical fiber hypersensor of a kind of measurable liquid quality and humidity, by wideband light source (1), the first single mode optical fiber(2), butterfly cone(3), the second single mode optical fiber(4), spectrometer(5)Composition, it is characterised in that:Broadband light Source(1)With the first single mode optical fiber(2)Left end connected by Transmission Fibers, the first single mode optical fiber(2)Right end and butterfly bore(3) Left end pass through heat sealing machine dislocation welding, butterfly cone(3)Right end and the second single mode optical fiber(4)Left end misplaced by heat sealing machine Welding, the second single mode optical fiber(4)Right end and spectrometer(5)It is connected by Transmission Fibers;Butterfly is bored(3)It is micro- to bore area a diameter of 80 Rice, cone section length are 95 microns, a diameter of 40 microns of center bead;First single mode optical fiber(2)Right end and butterfly bore(3) Left end by heat sealing machine dislocation welding, magnitude of misalignment is 9 microns;Butterfly is bored(3)Right end and the second single mode optical fiber(4)Left end By heat sealing machine dislocation welding, magnitude of misalignment is 9 microns.
The operation principle of the utility model is:Wideband light source(1)The light sent out enters the first single-mode optics by Transmission Fibers It is fine(2), forward light passes through the first single mode optical fiber(2)Afterwards by dislocation at, light at this time is divided into what two beams were propagated in fibre core Light and the light propagated in covering, two-beam proceed to butterfly cone(3)Place is coupled into fibre core again, to biography before then proceeding to It casts to and forms interference at dislocation again, final light beam passes through the second single mode optical fiber(4)Enter spectrometer by Transmission Fibers afterwards (5).
When specific environment works, due to the increase of humidity, the moisture adsorbed on optical fiber increases, butterfly cone(3) Peripheral region is bent, and the condition of optical fiber internal interference is changed, finally in spectrometer(5)In the signal that is changed.By spectrum Peak value and the data of relative humidity be fitted, obtain relational expression:
(3)
Wherein goodness of fit R2=0.9503, illustrate that the fitting effect of relational expression is fine, can use.It will detect at this time To spectrum peak strength substitute into relational expression with regard to corresponding relative air humidity can be calculated.Relative humidity detection range is 50%-85%。
It when liquid quality is measured, uniformly drips toward sensing unit, allows the moisture for staying in sensing unit with time nature Evaporation, optical fiber, with time change, are observed and recorded variation of the spectrum with the time, are made time and light by the degree that moisture is bent Compose the relational graph of trough intensity.In addition using the quality of the water of electronic balance weighing equivalent, and moisture is recorded as the time evaporates Mass figures, make relational graph.The result of the two is combined finally obtain the quality for remaining in sensing unit and spectrum it Between relational expression
(4)
Wherein the goodness of fit is R2=0.9867, sensor can measure the sensing unit residual liquid quality of 0 ~ 25mg.

Claims (4)

1. a kind of optical fiber hypersensor of measurable liquid quality and humidity, by wideband light source(1), the first single mode optical fiber (2), butterfly cone(3), the second single mode optical fiber(4), spectrometer(5)Composition, it is characterised in that:Wideband light source(1)With the first single mode Optical fiber(2)Left end connected by Transmission Fibers, the first single mode optical fiber(2)Right end and butterfly bore(3)Left end pass through welding Machine dislocation welding, butterfly cone(3)Right end and the second single mode optical fiber(4)Left end pass through heat sealing machine dislocation welding, the second single mode Optical fiber(4)Right end and spectrometer(5)It is connected by Transmission Fibers, wideband light source(1)The light sent out enters by Transmission Fibers First single mode optical fiber(2), forward light passes through the first single mode optical fiber(2)Afterwards by dislocation at, light at this time is divided into two beams in fibre The light propagated in core and the light propagated in covering, two-beam proceed to butterfly cone(3)Place is coupled into fibre core again, then Continue to form interference again at propagated forward to dislocation, final light beam passes through the second single mode optical fiber(4)Afterwards by Transmission Fibers into Enter spectrometer(5), when humidity is measured, as humidity increases, adsorb and bored in butterfly(3)On moisture it is more and more, light Fibre is bent, finally in spectrometer(5)In the signal that is changed, when liquid quality is measured, with remaining in butterfly Cone(3)On moisture it is fewer and fewer, the degree that optical fiber is bent constantly changes, and finally obtains the signal of variation.
2. the optical fiber hypersensor of a kind of measurable liquid quality according to claim 1 and humidity, feature exist In:Butterfly is bored(3)A diameter of 80 microns of area is bored, cone section length is about 95 microns, a diameter of 40 microns of center bead.
3. the optical fiber hypersensor of a kind of measurable liquid quality according to claim 1 and humidity, feature exist In:First single mode optical fiber(2)Right end and butterfly bore(3)Left end by heat sealing machine dislocation welding, magnitude of misalignment is 9 microns.
4. the optical fiber hypersensor of a kind of measurable liquid quality according to claim 1 and humidity, feature exist In:Butterfly is bored(3)Right end and the second single mode optical fiber(4)Left end by heat sealing machine dislocation welding, magnitude of misalignment is 9 microns.
CN201721459711.0U 2017-11-06 2017-11-06 A kind of optical fiber hypersensor of measurable liquid quality and humidity Expired - Fee Related CN207571012U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201721459711.0U CN207571012U (en) 2017-11-06 2017-11-06 A kind of optical fiber hypersensor of measurable liquid quality and humidity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201721459711.0U CN207571012U (en) 2017-11-06 2017-11-06 A kind of optical fiber hypersensor of measurable liquid quality and humidity

Publications (1)

Publication Number Publication Date
CN207571012U true CN207571012U (en) 2018-07-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201721459711.0U Expired - Fee Related CN207571012U (en) 2017-11-06 2017-11-06 A kind of optical fiber hypersensor of measurable liquid quality and humidity

Country Status (1)

Country Link
CN (1) CN207571012U (en)

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Granted publication date: 20180703

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