CN212083226U - Refractive index sensor structure based on double-layer rectangular plate micro channel - Google Patents
Refractive index sensor structure based on double-layer rectangular plate micro channel Download PDFInfo
- Publication number
- CN212083226U CN212083226U CN201922373747.2U CN201922373747U CN212083226U CN 212083226 U CN212083226 U CN 212083226U CN 201922373747 U CN201922373747 U CN 201922373747U CN 212083226 U CN212083226 U CN 212083226U
- Authority
- CN
- China
- Prior art keywords
- rectangular plate
- double
- refractive index
- rectangular
- index sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The utility model discloses a refracting index sensor structure based on double-deck rectangular plate microchannel, it includes double-deck rectangular plate and optic fibre sensing part. The double-layer rectangular plate is formed by connecting an upper-layer rectangular plate and a lower-layer rectangular plate in a seamless mode. The upper rectangular plate comprises a water inlet column and a water outlet column; the lower rectangular plate comprises a cylindrical hole, a cylindrical groove, a rectangular groove micro-channel and a rectangular clamping groove, and the size of the rectangular clamping groove is the same as that of the upper rectangular plate. The optical fiber sensing part is arranged in the rectangular groove micro-channel, two ends of the optical fiber sensing part are fixed in the column-shaped groove, the broadband light source, the refractive index sensor of the double-layer rectangular plate micro-channel and the spectrometer are sequentially connected to form a refractive index sensing system, and the refractive index is measured according to the response change of the interference wave trough of the output spectrum to the refractive index. The utility model discloses not only have simple structure, cost of manufacture low, sensitivity high, stability good, easily advantages such as commercialization to adopt the miniflow channel design, reduce the sample quantity of being surveyed, have good application prospect.
Description
Technical Field
The utility model belongs to the technical field of the optical fiber sensing, especially, a refractive index sensor structure based on double-deck rectangular plate miniflow channel.
Background
In recent years, optical fiber sensors have been extensively studied and rapidly developed due to their advantages of low cost, easy manufacture, simple structure, small electromagnetic interference, suitability for severe environments, and the like. The optical fiber sensor can realize accurate measurement of various physical parameters, such as temperature, refractive index, magnetic field, chemical substance concentration, gas concentration and the like, and has high accuracy, so that the optical fiber sensor is widely applied to various fields of biology, chemistry, medical treatment and the like.
The refractive index is one of important optical parameters of a substance, and the concentration of the substance to be detected can be intuitively reflected, so that the refractive index sensor has a good application prospect in the fields of biochemical analysis, food detection, environmental monitoring, industrial production and the like. The traditional electrical refractive index sensor has a complex structure, high preparation cost and backward measurement technology, and is difficult to meet the requirements of electromagnetic interference resistance, high temperature resistance, high-precision measurement and the like. The optical fiber refractive index sensor solves the problems in many aspects of measurement. At present, an optical fiber refractive index sensor becomes one of the hot spots of research in the optical sensing field by virtue of the advantages of small volume, simple manufacture, low cost, strong electromagnetic interference resistance and the like. The optical fiber refractive index sensor provided at present is complex to prepare, and some sensors need special processing technology, so that the manufacturing cost and the difficulty of the sensor are increased, and the practicability is not facilitated. Therefore, it is desirable to provide a refractive index sensor that is inexpensive to manufacture, simple in structure, and convenient to use.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a refractive index sensor structure based on double-deck rectangular plate microchannel, solve that current refractive index sensor measurement sensitivity is low, the liquid volume that awaits measuring is big, be unfavorable for reducing volume and cost of manufacture scheduling problem.
The utility model adopts the technical proposal that: a refractive index sensor structure based on a double-layer rectangular plate micro channel is characterized by comprising a broadband light source, a double-layer rectangular plate, an optical fiber sensing part and a spectrometer.
The double-layer rectangular plate is formed by bonding an upper-layer rectangular plate and a lower-layer rectangular plate together.
The double-deck rectangular plate includes upper rectangular plate and lower floor's rectangular plate two parts, and wherein upper rectangular plate upper surface has two cylinders, and every cylinder center all has a through-hole, runs through whole rectangular plate, as sample entrance post and export post, the sample flows in from the entrance post, through square groove miniflow way back, flows out from the export post, and the rectangular plate is equipped with fillet structure all around, is convenient for with the seamless laminating of lower floor's rectangular plate.
The double-layer rectangular plate comprises an upper rectangular plate and a lower rectangular plate, wherein the upper surface of the lower rectangular plate is provided with a rectangular clamping groove, the size of the rectangular clamping groove is the same as that of the bottom of the upper rectangular plate, the rectangular clamping groove is used for placing the upper rectangular plate, a rectangular groove micro channel is arranged in the middle of the rectangular plate, and as a sample pool, two sections of columnar grooves are arranged on two sides of the rectangular groove micro channel and used for fixing optical fibers, and four cylindrical holes are formed in the periphery of the rectangular plate and used for fixing the double-layer rectangular plate structure.
The optical fiber sensing part comprises a coreless optical fiber and two sections of single-mode optical fibers, the coreless optical fiber is welded between the two sections of single-mode optical fibers, the coreless optical fiber part is placed in a rectangular groove micro-channel of a lower rectangular plate and used for detecting the change of the refractive index of a sample, the columnar grooves on two sides are used for fixing the single-mode optical fibers, and the other ends of the two sections of single-mode optical fibers are respectively connected with a broadband light source and a spectrometer.
The test method based on the double-layer rectangular plate micro-channel refractive index sensor is realized by using the sensor, when a sample is injected into the rectangular groove micro-channel, an optical signal is emitted by a broadband light source, passes through an optical fiber sensing part, and is monitored and recorded by a spectrum analyzer to output a spectrum. When the refractive index of the sample changes, the output spectrum shifts, and the concentration change condition of the sample can be obtained according to the wavelength change corresponding to the spectral self-imaging peak valley.
Compared with the prior art, the utility model discloses a technical characteristics and effect:
the utility model has the advantages of, the refracting index sensor of integrated double-deck rectangular plate microchannel has simple structure, the preparation is easy, with low costs, sensitivity is high, response speed is fast, stability is good, can used repeatedly's advantage. The micro flow channel is adopted, the using amount of a detected sample can be reduced, the commercialization is easy, the use is convenient, and the micro flow channel has wide application scenes in the field of optical fiber biochemical sensors.
Drawings
Fig. 1 is a schematic structural view of an integrated microchannel refractive index sensor used in the present invention.
Fig. 2(a) is a schematic front view of an upper rectangular plate structure of an integrated double-layer rectangular plate used in the present invention; FIG. 2(b) is a schematic bottom view thereof.
Fig. 3(a) is a front schematic view of a lower rectangular plate structure of an integrated double-layer rectangular plate used in the present invention; fig. 3(b) is a left side schematic view thereof.
Fig. 4 is a schematic diagram of an integrated microchannel refractive index sensing system as used by the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1-an upper rectangular plate; 2-lower rectangular plate; 3-cylindrical hole (for fixing sensor); 4-cylindrical grooves (for holding single mode fibers); 5-an inlet column; 6-outlet column; 7-sample injection hole; 8-rectangular groove micro-channel; 9-rectangular clamping grooves (used for being attached to the upper rectangular plate); 10-a single mode optical fiber; 11-a coreless fiber; 12-double-layer rectangular plate micro-channel refractive index sensor; 13-a liquid pump; 14-a broadband light source; 15-spectrometer.
Detailed Description
The utility model discloses a refractive index sensor structure based on double-deck rectangular plate miniflow channel mainly includes refractive index sensor, the spectrum appearance of broadband light source, double-deck rectangular plate miniflow channel.
The utility model discloses an utilize following technical scheme to realize: two sections of single-mode fibers are welded at two ends of one section of coreless fiber to form an SNCS (single mode-coreless-single mode) structure, the coreless fiber is placed in a rectangular groove micro-channel in a lower rectangular plate, the single-mode fibers at two ends are fixed in a columnar groove, an upper rectangular plate and the lower rectangular plate are bonded together, a liquid pump is connected between a water inlet column and a water outlet column of the upper rectangular plate to enable an injected sample to circulate, and a broadband light source and a spectrometer are respectively connected to two sides of the two sections of single-mode fibers to form a refractive index detection system.
The utility model discloses the scientific principle who bases: the optical signal is sent by the broadband light source, the coreless optical fiber in the sensor is used for sensing the change of the refractive index, when the concentration of a sample injected into the sensor is changed, the refractive index of the sample is also changed, so that a self-imaging peak in an output spectrum is shifted, the spectrometer is used for monitoring and recording the output spectrum, and the change of the concentration of the sample can be obtained by measuring the change of the self-imaging peak valley value of the output spectrum of the spectrometer under different samples to be measured.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in figure 1, the refractive index sensor structure based on the double-layer rectangular plate micro-channel comprises an upper rectangular plate 1 and a lower rectangular plate 2, and is made by printing through a 3D printer by using a photosensitive resin material. The upper rectangular plate 1 and the lower rectangular plate 2 are bonded together seamlessly by an adhesive.
As shown in fig. 2(a) and 2(b), the upper surface of the upper rectangular plate 1 has two columns as an inlet column 5 and an outlet column 6. The centers of the water inlet column 5 and the water outlet column 6 are respectively provided with a sample injection hole 7 for the inflow and outflow of samples, and the periphery of the upper layer rectangular plate 1 is provided with a round corner structure which is convenient for being attached to the lower layer rectangular plate 2.
As shown in fig. 3(a) and 3(b), four cylindrical holes 3 are formed around the lower rectangular plate 2 for fixing the sensor; two sides of the single-mode optical fiber are respectively provided with a columnar groove 4 for fixing the single-mode optical fiber 10; a rectangular groove micro-channel 8 (the length is 90mm, the width is 1mm, and the height is 1mm) is arranged in the middle of the lower rectangular plate 2; the upper surface of the lower rectangular plate 2 is provided with a rectangular clamping groove 9, the size of the rectangular clamping groove is the same as that of the upper rectangular plate 1, and the rectangular clamping groove is used for being attached to the upper rectangular plate 1. A coreless optical fiber 11 is welded between two sections of single-mode optical fibers 10, the coreless optical fiber 11 is placed in a rectangular groove micro-channel 8 and used for detecting the change of the refractive index of a sample, and the single-mode optical fibers 10 at two ends are fixed in a columnar groove 4.
As shown in fig. 4, an integrated microchannel refractive index sensing system includes a double-layer rectangular plate microchannel refractive index sensor 12, a liquid pump 13, a broadband light source 14, and a spectrometer 15. The water inlet column 5 and the water outlet column 6 of the double-layer rectangular plate micro-channel refractive index sensor 12 are respectively connected with two ends of a liquid pump 13, so that a sample to be measured circularly flows, and the stability of measurement is ensured. The optical signal is sent by a broadband light source 14, a sample to be detected is injected into a micro-channel refractive index sensor 12 of a double-layer rectangular plate, a coreless optical fiber 11 is used for sensing the change of the refractive index of the sample, and a spectrometer 15 is used for monitoring and recording an output spectrum. When the concentration of the sample to be detected changes, the self-imaging peak of the output spectrum shifts, and the concentration of the sample can be obtained by measuring the wavelength inversion of the self-imaging peak-valley value of the output spectrum of the spectrometer under different samples to be detected.
Claims (4)
1. The utility model provides a refracting index sensor structure based on double-deck rectangular plate microchannel, includes double-deck rectangular plate and optic fibre sensing part, its characterized in that, double-deck rectangular plate is made by upper rectangular plate and lower floor's rectangular plate seamless bonding to fix optic fibre sensing part in double-deck rectangular plate, constitute refracting index sensor.
2. The structure of a refractive index sensor based on a micro flow channel having a double-layered rectangular plate as claimed in claim 1, wherein the upper surface of the upper rectangular plate has two columns, each having a through hole at the center thereof, extending through the entire rectangular plate as the inlet and outlet pillars for the sample, and the periphery of the rectangular plate is provided with a rounded corner structure.
3. The structure of a refractive index sensor based on a double-layered rectangular plate microchannel as set forth in claim 1, wherein the lower rectangular plate has a rectangular groove on its upper surface, the size of which is the same as that of the bottom of the upper rectangular plate, a rectangular groove microchannel is formed in the middle of the rectangular plate, two cylindrical grooves are formed on both sides of the rectangular groove microchannel, and four cylindrical holes are formed in the periphery of the lower rectangular plate.
4. The structure of a refractive index sensor based on a double-layered rectangular plate micro flow channel as claimed in claim 1, wherein the upper rectangular plate and the lower rectangular plate are joined together seamlessly by an adhesive, and wherein the micro flow channel is provided in a rectangular groove structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922373747.2U CN212083226U (en) | 2019-12-25 | 2019-12-25 | Refractive index sensor structure based on double-layer rectangular plate micro channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922373747.2U CN212083226U (en) | 2019-12-25 | 2019-12-25 | Refractive index sensor structure based on double-layer rectangular plate micro channel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212083226U true CN212083226U (en) | 2020-12-04 |
Family
ID=73566528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922373747.2U Active CN212083226U (en) | 2019-12-25 | 2019-12-25 | Refractive index sensor structure based on double-layer rectangular plate micro channel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212083226U (en) |
-
2019
- 2019-12-25 CN CN201922373747.2U patent/CN212083226U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102539361B (en) | Long-path optical fiber-microfluidic chip sensor for detecting absorbance and refraction index | |
| EP0901620A1 (en) | Optical detection apparatus for chemical analyses of small volumes of samples | |
| CN106053390A (en) | Surface detect cavity photonic crystal refractive index sensor containing absorption medium graphene | |
| CN102565000B (en) | Multimode interference biological chemical sensor based on silicon slot waveguides | |
| CN201984033U (en) | SPR (surface plasmon resonance) detector for liquid phase microfluidic analysis system | |
| CN103575698A (en) | Optical biochemical sensing chip of micro-ring resonant cavity embedded FP (Fabry-Pero) cavity | |
| CN103245641A (en) | Multi-channel planar waveguide evanescent wave biosensor | |
| CN106918579A (en) | Multichannel optical fiber type surface plasma resonance spectrometer | |
| CN101813622B (en) | Optical-waveguide two-channel interferometer array | |
| CN212083226U (en) | Refractive index sensor structure based on double-layer rectangular plate micro channel | |
| US6652810B1 (en) | Measuring chamber with luminescence-optical sensor elements | |
| CN108872110B (en) | High-refractive-index-sensitivity optical fiber micro-flow sensor and preparation method thereof | |
| Llobera et al. | Enhancement of the response of poly (dimethylsiloxane) hollow prisms through air mirrors for absorbance-based sensing | |
| CN107340004A (en) | A kind of two-parameter detecting system for surpassing surface based on medium | |
| CN111272700A (en) | Refractive index sensor structure based on double-layer rectangular plate micro-channel and preparation method thereof | |
| CN206772322U (en) | A kind of two-parameter detecting system for surpassing surface based on medium | |
| CN203385668U (en) | Slit waveguide series grating FP (Fabry-Perot) cavity optical biochemical sensor chip | |
| CN107525564A (en) | A kind of nanoliter level capacitance level transducer and preparation method | |
| CN113376095B (en) | Signal integrated optical micro-flow sensor | |
| CN106841121A (en) | A kind of SPR biochemical sensors based on ridge optical waveguide | |
| CN203705340U (en) | Optical biochemical sensor chip of FP cavity embedded into micro-ring resonator | |
| CN107543934B (en) | Packaging structure of silicon-based biological sensing chip | |
| CN109975245A (en) | Biosensor and preparation method thereof | |
| CN105548135B (en) | A kind of surface-enhanced Raman micro-fluidic chip and the detecting system comprising the chip | |
| CN108387551B (en) | Sensor based on guided mode resonance effect |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |