CN105466808B - A kind of liquid refractivity fibre optical sensor based on image analysis and surface plasma body resonant vibration - Google Patents
A kind of liquid refractivity fibre optical sensor based on image analysis and surface plasma body resonant vibration Download PDFInfo
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- CN105466808B CN105466808B CN201610031029.5A CN201610031029A CN105466808B CN 105466808 B CN105466808 B CN 105466808B CN 201610031029 A CN201610031029 A CN 201610031029A CN 105466808 B CN105466808 B CN 105466808B
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Abstract
A kind of liquid refractivity fibre optical sensor based on image analysis and surface plasma body resonant vibration, it is characterised in that：It is made of the first single mode optical fiber, spr sensor, liquid tank, liquid capping, the second single mode optical fiber, photoswitch, third single mode optical fiber, LED light source, CCD camera, reflecting grating, beam expander, image storage hard disk, data connecting line and computer；It is separately connected the first single mode optical fiber and the second single mode optical fiber at the both ends of spr sensor, the another port of first single mode optical fiber is connected to beam expander, beam expander emergent ray can be vertically mapped in reflecting grating, before reflecting grating is mounted on CCD camera, the another port and third single mode optical fiber one end of second single mode optical fiber are connected on the both sides of photoswitch respectively, the third single mode optical fiber other end is connected with LED light source, and image storage hard disk is connect with computer with data connecting line.High sensitivity of the present invention, easy to use, cost is relatively low, can be applied to detect various environmental index and physiological health parameter.
Description
Technical field
A kind of liquid refractivity fibre optical sensor based on image analysis and surface plasma body resonant vibration, belongs to Fibre Optical Sensor
Technical field.
Background technology
With the development of present measuring technique, fibre optical sensor is compared with traditional electric transducer, due to having not by electromagnetism
Interference, high sensitivity, small, light-weight, reusability is strong, the advantages that various structure and materials can be embedded to and gradually by people
Paid attention to.In recent years, people have been developed that various fibre optical sensors for the survey to physical quantitys such as temperature, pressure, strains
Amount, in practical applications, the measurement of liquid solution concentration, ingredient also have a considerable meaning, it is various based on surface etc. from
Daughter resonance optical fiber sensor is also gradually proposed by people.Heretofore described one kind be based on image analysis and surface etc. from
The liquid refractivity fibre optical sensor of daughter resonance, basic principle are to be based on light in various concentration solution by surface etc.
There is different wavelength after gas ions resonance optical fiber, to which diffraction generates different spectrum.
Surface plasma body resonant vibration (SPR) is a kind of optical physics phenomenon.When Ray Of Light is incident in certain angle
To prism end face, surface plasma-wave will be generated at the interface of prism and metallic film (Au or Ag).Work as surface plasma wave
When being matched with incident ray propagation constant, free electron in metal film is caused to generate resonance, i.e. surface etc. under the excitation of light
Ion resonance, so as to cause transmitted light wavelength change, and the propagation of surface plasma wave largely with surrounding medium
Refractive index is related, so surface plasma resonance sensor can be made into high precision refraction meter.The solution of various concentration has
There are different refractive index, optical fiber just to will produce different degrees of wavelength change by the solution of various concentration, allow and passed through SPR light
By diffraction grating, the transmitted ray of different wave length just will produce different spectrum, taken the photograph in this way by CCD light after fiber sensor
As respective change will occur for the rgb pixel point quantity in image that head takes, passed through by demarcating LED light source light in advance
Rgb pixel point situation of change after various strength solutions, so that it may be made one for measure solution concentration based on computer
The liquid refractivity and solution concentration fibre optical sensor used.
Invention content
The purpose of the present invention is to provide a kind of utilization image analysis and surface plasmas that can be used on computers
The liquid refractivity fibre optical sensor of resonance body.The device can be by passing through the SPR sensorgram in different solutions concentration
The quick measurement to solution concentration is realized in the difraction spectrum image analysis of the LED light source of device.The device have it is simple in structure, be easy to
It operates, detect the features such as quick.
The invention is realized by the following technical scheme：
A kind of liquid refractivity fibre optical sensor based on image analysis and surface plasma body resonant vibration, it is characterised in that：
By the first single mode optical fiber (1), spr sensor (2), liquid tank (3), liquid capping (4), the second single mode optical fiber (5), photoswitch
(6), third single mode optical fiber (7), LED light source (8), CCD camera (9), reflecting grating (10), beam expander (11), image storage
Hard disk (12), data connecting line (13) and computer (14) composition；It is single it to be separately connected first at the both ends of spr sensor (2)
The another port of first single mode optical fiber (1) is connected to beam expander (11), beam expander by mode fiber (1) and the second single mode optical fiber (5)
(11) emergent ray can be vertically mapped in reflecting grating (10), before reflecting grating (10) is mounted on CCD camera (9), the
The another port and third single mode optical fiber (7) one end of two single mode optical fibers (5) are connected on the both sides of photoswitch (6), third single mode respectively
Optical fiber (7) other end is connected with LED light source (8), and spr sensor (2) is mounted in liquid tank (7), and liquid capping (8) can cover
Liquid tank (7), the first single mode optical fiber (1), the second single mode optical fiber (5), photoswitch (6), third single mode optical fiber (7), LED light source
(8), CCD camera (9), reflecting grating (10), beam expander (11) are embedded in image storage hard disk (12), liquid tank (3), liquid
Body capping (4) is in image storage hard disk (12) surface, image storage hard disk (12) and computer (14) data connecting line (13)
Connection.
A kind of liquid refractivity fibre optical sensor based on image analysis and surface plasma body resonant vibration, feature
It is：First single mode optical fiber (1), spr sensor (2), the second single mode optical fiber (5), third single mode optical fiber (7) core diameter be
400μm。
A kind of liquid refractivity fibre optical sensor based on image analysis and surface plasma body resonant vibration, feature
It is：The fibre core material of first single mode optical fiber (1), spr sensor (2), the second single mode optical fiber (5) and third single mode optical fiber (7)
Matter is PCS polymer.
A kind of liquid refractivity fibre optical sensor based on image analysis and surface plasma body resonant vibration, feature
It is：The fiber lengths of spr sensor (2) are 10mm, and optical fiber surface is silver-plated, silver film thickness 20-100nm.
A kind of liquid refractivity fibre optical sensor based on image analysis and surface plasma body resonant vibration, feature
It is：0.67 μm~0.83 μm of the grating constant of reflecting grating (10).
A kind of liquid refractivity fibre optical sensor based on image analysis and surface plasma body resonant vibration, feature
It is：Reflecting grating (10) surface carries out curing process with 184 silicon rubber of Slygard, and it is small to stand 48 after solidification at room temperature
When, then it is connect again with the first single mode optical fiber (1).
The present invention operation principle be：LED light source (8) emits beam and is coupled into third single mode optical fiber (7) first, passes through
After photoswitch (6) and the second single mode optical fiber (5) SPR is penetrated using the spr sensor (2) being immersed in solution to be measured, light
Sensor (2) enters the first single mode optical fiber (1) afterwards, and beam expander (11) can expand the emergent ray of the first single mode optical fiber (1) simultaneously
It is allowed to vertically penetrate and be irradiated in reflecting grating (10), the difraction spectrum image that reflecting grating (10) generates will be by CCD camera (9)
Shooting, the diffraction image taken are transferred to the concentration that computer (13) can be obtained by solution to be measured by processing.Surface etc.
Ion resonance body (SPR) is a kind of optical physics phenomenon.When Ray Of Light is incident on prism end face in certain angle, in rib
The interface of mirror and metallic film (Au or Ag) will generate surface plasma-wave.When surface plasma wave and incident ray are propagated often
When number matching, free electron in metal film is caused to generate resonance, i.e. surface plasma resonance under the excitation of light, so as to cause
Transmitted light wavelength change, and the propagation of surface plasma wave is largely related with the refractive index of surrounding medium, so table
Surface plasma resonance sensor can be made into high precision refraction meter.The solution of various concentration has different refractive index, light
Fibre just will produce different degrees of wavelength change by the solution of various concentration, allow the light after having passed through SPR fibre optical sensors
By diffraction grating, the transmitted ray of different wave length just will produce different spectrum, the image taken in this way by CCD camera
In rgb pixel point quantity respective change will occur, after demarcating LED light source light in advance by various strength solutions
Rgb pixel point situation of change, so that it may a liquid refractivity used based on computer for measuring solution concentration is made
With solution concentration fibre optical sensor.
The beneficial effects of the invention are as follows：A kind of liquid refractivity based on image analysis and surface plasma body resonant vibration
Fibre optical sensor, on image transmitting hard disk, when use, need to only connect data transmission hard disk the sensor integrative installation technology
To computer, opens and solution to be measured is instilled into the i.e. measurable solution concentration of groove after lid cleans, close the lid when not in use i.e.
Dustproof and waterproof, very easy to use, accuracy of detection is also very high.
Description of the drawings
Fig. 1 is a kind of liquid refractivity Fibre Optical Sensor based on image analysis and surface plasma body resonant vibration of the present invention
Device；
Fig. 2 is the corresponding gray-scale intensity distribution curve for the difraction spectrum that the mobile phone camera of the present invention takes；
Fig. 3 is the glycerin solution concentration measured and respective indices of refraction relationship of the present invention.
Specific implementation mode
Below in conjunction with the accompanying drawings and embodiment the invention will be further described：
Referring to attached drawing 1, a kind of liquid refractivity fibre optical sensor based on image analysis and surface plasma body resonant vibration,
It is characterized in that：By the first single mode optical fiber (1), spr sensor (2), liquid tank (3), liquid capping (4), the second single mode optical fiber
(5), photoswitch (6), third single mode optical fiber (7), LED light source (8), CCD camera (9), reflecting grating (10), beam expander
(11), image storage hard disk (12), data connecting line (13) and computer (14) composition；At the both ends of spr sensor (2) point
The first single mode optical fiber (1) and the second single mode optical fiber (5) are not connected, and the another port of the first single mode optical fiber (1) is connected to and is expanded
The emergent ray of device (11), beam expander (11) can be vertically mapped in reflecting grating (10), and reflecting grating (10) is taken the photograph mounted on CCD
Before head (9), the another port and third single mode optical fiber (7) one end of the second single mode optical fiber (5) are connected on the two of photoswitch (6) respectively
Side, third single mode optical fiber (7) other end are connected with LED light source (8), and spr sensor (2) is mounted in liquid tank (7), liquid tank
Cover (8) can Covering Liguid slot (7), the first single mode optical fiber (1), the second single mode optical fiber (5), photoswitch (6), third single mode optical fiber
(7), LED light source (8), CCD camera (9), reflecting grating (10), beam expander (11) are embedded in image storage hard disk (12),
On image storage hard disk (12) surface, image storage hard disk (12) uses number with computer (14) for liquid tank (3), liquid capping (4)
It is connected according to connecting line (13).
LED light source (8) emits beam is coupled into third single mode optical fiber (7) first, by photoswitch (6) and the second single mode
Using the spr sensor (2) being immersed in solution to be measured after optical fiber (5), the silver film thickness of spr sensor (2) is 50nm, light
Line enters the first single mode optical fiber (1) afterwards through spr sensor (2), and beam expander (11) can be by the emergent light of the first single mode optical fiber (1)
Line, which expands and is allowed to vertically penetrate, is irradiated to reflecting grating (10), and the grating constant of reflecting grating (10) is 0.83 μm of reflecting grating
(10) the difraction spectrum image generated will be shot by CCD camera (9), after the diffraction image taken is transferred to computer (13)
It can be obtained by the concentration of solution to be measured through processing.
Claims (6)
1. a kind of liquid refractivity fibre optical sensor based on image analysis and surface plasma body resonant vibration, it is characterised in that：By
First single mode optical fiber (1), spr sensor (2), liquid tank (3), liquid capping (4), the second single mode optical fiber (5), photoswitch (6),
Third single mode optical fiber (7), LED light source (8), CCD camera (9), reflecting grating (10), beam expander (11), image storage hard disk
(12), data connecting line (13) and computer (14) composition；It is separately connected the first single-mode optics at the both ends of spr sensor (2)
Fine (1) and the second single mode optical fiber (5), beam expander (11), beam expander (11) are connected to by the another port of the first single mode optical fiber (1)
Emergent ray can vertically be mapped in reflecting grating (10), before reflecting grating (10) is mounted on CCD camera (9), second is single
The another port and third single mode optical fiber (7) one end of mode fiber (5) are connected on the both sides of photoswitch (6), third single mode optical fiber respectively
(7) other end is connected with LED light source (8), and spr sensor (2) is mounted in liquid tank (3), and liquid capping (4) can Covering Liguid
Slot (3), the first single mode optical fiber (1), the second single mode optical fiber (5), photoswitch (6), third single mode optical fiber (7), LED light source (8),
CCD camera (9), reflecting grating (10), beam expander (11) are embedded in image storage hard disk (12), liquid tank (3), liquid tank
(4) are covered on image storage hard disk (12) surface, image storage hard disk (12) is connect with computer (14) with data connecting line (13)；
LED light source (8) emits beam is coupled into third single mode optical fiber (7) first, by photoswitch (6) and the second single mode optical fiber
(5) enter the first single mode afterwards through spr sensor (2) using the spr sensor (2) being immersed in solution to be measured, light after
The emergent ray of first single mode optical fiber (1) can be expanded and be allowed to vertical irradiation to reflecting grating by optical fiber (1), beam expander (11)
(10) on, the difraction spectrum image that reflecting grating (10) generates will be shot by CCD camera (9), and the diffraction image taken passes
The defeated concentration that can be obtained by solution to be measured by processing to computer (14)；
There is the solution of various concentration different refractive index, optical fiber just will produce different degrees of wave by the solution of various concentration
Long variation, allows the light after having passed through spr sensor (2) by reflecting grating (10), the transmitted ray of different wave length will produce
Different spectrum is given birth to, respective change will occur for the rgb pixel point quantity in the image taken in this way by CCD camera (9).
2. according to claim 1 a kind of based on the liquid refractivity optical fiber of image analysis and surface plasma body resonant vibration biography
Sensor, it is characterised in that：First single mode optical fiber (1), spr sensor (2), the second single mode optical fiber (5), third single mode optical fiber (7)
Core diameter be 400 μm.
3. according to claim 1 a kind of based on the liquid refractivity optical fiber of image analysis and surface plasma body resonant vibration biography
Sensor, it is characterised in that：First single mode optical fiber (1), spr sensor (2), the second single mode optical fiber (5) and third single mode optical fiber
(7) fibre core material is PCS polymer.
4. according to claim 1 a kind of based on the liquid refractivity optical fiber of image analysis and surface plasma body resonant vibration biography
Sensor, it is characterised in that：The fiber lengths of spr sensor (2) are 10mm, and optical fiber surface is silver-plated, silver film thickness 20-100nm.
5. according to claim 1 a kind of based on the liquid refractivity optical fiber of image analysis and surface plasma body resonant vibration biography
Sensor, it is characterised in that：The grating constant of reflecting grating (10) is 0.67 μm~0.83 μm.
6. according to claim 1 a kind of based on the liquid refractivity optical fiber of image analysis and surface plasma body resonant vibration biography
Sensor, it is characterised in that：Reflecting grating (10) surface carries out curing process with Slygard184 silicon rubber, after solidification at room temperature
48 hours are stood, is then connect again with the first single mode optical fiber (1).
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| CN201610031029.5A CN105466808B (en) | 2016-01-13 | 2016-01-13 | A kind of liquid refractivity fibre optical sensor based on image analysis and surface plasma body resonant vibration |
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| CN201610031029.5A CN105466808B (en) | 2016-01-13 | 2016-01-13 | A kind of liquid refractivity fibre optical sensor based on image analysis and surface plasma body resonant vibration |
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| CN105466808B true CN105466808B (en) | 2018-08-03 |
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| CN106442418A (en) * | 2016-09-06 | 2017-02-22 | 大连理工大学 | Low-cost spectroscopic imaging system based on surface plasma resonance |
| CN109316169A (en) * | 2018-11-03 | 2019-02-12 | 复旦大学 | A kind of health detector and its detection method based on mobile intelligent terminal |
| CN113341708B (en) * | 2021-05-14 | 2022-05-20 | 华中科技大学 | Method and system for measuring plasma parameters of femtosecond laser induced gas ionization |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002350335A (en) * | 2001-05-28 | 2002-12-04 | Tama Tlo Kk | Refractive index sensor, sensor system and optical fiber |
| CN104614345A (en) * | 2015-01-21 | 2015-05-13 | 大连理工大学 | Portable optical fiber SPR (Surface Plasma Resonance) image sensor |
| CN204789331U (en) * | 2015-07-24 | 2015-11-18 | 大连理工大学 | Optic fibre surface plasma resonance image sensor based on smart mobile phone monitoring platform |
| CN205483905U (en) * | 2016-01-13 | 2016-08-17 | 中国计量学院 | Liquid refracting index optical fiber sensor based on image analysis and resonance of surperficial plasma |
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2016
- 2016-01-13 CN CN201610031029.5A patent/CN105466808B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002350335A (en) * | 2001-05-28 | 2002-12-04 | Tama Tlo Kk | Refractive index sensor, sensor system and optical fiber |
| CN104614345A (en) * | 2015-01-21 | 2015-05-13 | 大连理工大学 | Portable optical fiber SPR (Surface Plasma Resonance) image sensor |
| CN204789331U (en) * | 2015-07-24 | 2015-11-18 | 大连理工大学 | Optic fibre surface plasma resonance image sensor based on smart mobile phone monitoring platform |
| CN205483905U (en) * | 2016-01-13 | 2016-08-17 | 中国计量学院 | Liquid refracting index optical fiber sensor based on image analysis and resonance of surperficial plasma |
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