CN104165706B - The making of PbSe quantum dot liquid-core optical fibre temperature sensor and temperature checking method - Google Patents
The making of PbSe quantum dot liquid-core optical fibre temperature sensor and temperature checking method Download PDFInfo
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- CN104165706B CN104165706B CN201410405996.4A CN201410405996A CN104165706B CN 104165706 B CN104165706 B CN 104165706B CN 201410405996 A CN201410405996 A CN 201410405996A CN 104165706 B CN104165706 B CN 104165706B
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Abstract
The invention discloses making and the temperature checking method of a kind of PbSe quantum dot liquid-core optical fibre temperature sensor.Manufacture method is divided into the colloid PbSe quantum dot of selected sizes, prepare colloid PbSe quantum dot solution, colloid PbSe quantum dot temperature sensitive fluorescence material solution is injected separately in the hollow optic fibre that model is identical with trichloro ethylene solution and is packaged, complete the making of colloid PbSe quantum dot liquid-core optical fibre sensing element, build five steps such as colloid PbSe quantum dot liquid-core optical fibre temperature sensor.Temperature checking method is divided into making colloid PbSe liquid-core optical fibre temperature sensor, demarcates colloid PbSe quantum dot liquid-core optical fibre temperature sensor, and application colloid PbSe quantum dot liquid-core optical fibre temperature sensor carries out three steps such as achieving multipoint temperature detection.Device designed by the present invention can realize the temperature detection of multiple spot, and the fluorescent material low cost that used, length in service life, high quantum production rate, designed temperature sensor cost of manufacture is low, simple in construction, good stability.
Description
Technical field
The present invention relates to temperature detection and fibre optic temperature sensor field, relate to a kind of colloid PbSe quantum dot liquid-core optical fibre
Structure design, making and the method for achieving multipoint temperature detection of temperature sensor.
Background technology
Along with the rise of Fiber Optic Pyrometer, fibre optic temperature sensor is studied widely and is applied.Optical fiber has not
The advantages such as charged, volume is little, light weight, flexible, radiation resistance is good.It is as transmission material simultaneously, has operating frequency
The advantages such as width, dynamic range are big.Fibre optic temperature sensor, compared with traditional temperature sensor, has plurality of advantages: light wave is not
Produce electromagnetic interference, easily received by various sensitive detection parts, photoelectricity or electro-optic conversion, easily and the hyundai electronics of high development can be carried out
Device matches.It is widely used in inflammable, explosive, space is strictly limited and the adverse circumstances such as strong electromagnetic
Under.
It is glimmering that fibre optic temperature sensor is broadly divided into distributed optical fiber temperature sensor, fiber-optical grating temperature sensor, optical fiber
Light temperature sensor, Interference optical-fiber temperature sensors etc., and wherein optical fiber fluorescence temperature sensor is that research is the most alive at present
The novel optical fiber temperature sensor jumped.At present, optical fiber fluorescence temperature sensor mainly uses rare earth material or organic material conduct
Fluorescent material, not only cost is high, its wave-length coverage cannot meet some detectors and connect simultaneously by such environmental effects service life
Receipts scope.Colloidal semiconductor quanta point material is a kind of novel fluorescent material, uses with traditional fiber fluorescence temperature sensor
Fluorescent material compare, have that length in service life, low cost, fluorescence quantum yield be high, the emission spectrum of size adjustable etc. exclusive
Advantage, can be as novel light-converting material.Colloid lead selenide (PbSe) quantum dot has the strongest quantum near infrared region
Confinement and high quantum production rate (> 85%), and its photoluminescent property is directly related with temperature.Therefore, colloid PbSe quantum dot conduct
The fluorescence transition material of fibre optic temperature sensor demonstrates good application prospect.
Based on above-mentioned background, the method for sensing of development of new, design has low cost, life-span length, quantum yield height, sends out
Penetrate the colloid PbSe quanta point optical fiber fluorescence temperature sensor part of the advantages such as spectrum field width, contribute to promoting temperature detection technology
Development further.Through searching, make colloid PbSe quantum dot wick-containing based on colloid PbSe quantum dot liquid-core optical fibre sensing element
Fibre optic temperature sensor, and the method realizing temperature detection at home and abroad there are no relevant report.
Summary of the invention
In order to overcome fluorescent material life-span that optical fiber fluorescence temperature sensor exists by such environmental effects, cost intensive,
The shortcomings such as low quantum yield, wavelength domain are narrow, the present invention provide a kind of PbSe quantum dot liquid-core optical fibre temperature sensor making and
Temperature checking method, the method use colloid PbSe quantum dot as the temperature sensitive fluorescence material in optical fiber, utilize its size,
The one_to_one corresponding of the photoluminescent property of temperature-independent and the colloid PbSe quantum dot emission spectral intensity of specific dimensions and temperature
Relation, uses series of process method, makes based on colloid PbSe quantum dot liquid-core optical fibre temperature-sensing element (device), and builds colloid
PbSe quantum dot liquid-core optical fibre temperature sensor.In colloid PbSe quantum dot liquid-core optical fibre temperature sensor, by temperature-independent
Multiple spot liquid-core optical fibre sensing element output optical signal, be converted to the signal of telecommunication by photoelectric device, via amplifier amplify, A/
After D transducer, single-chip microcomputer collection and data process, it is transferred to display display reading, it is achieved the multiple spot detection of temperature.The present invention
The temperature detection range of constructed colloid PbSe quantum dot liquid-core optical fibre temperature sensor is 0 DEG C～90 DEG C, and resolution is 0.1
℃。
The present invention adopts the following technical scheme that realization, and accompanying drawings is as follows:
1, the manufacture method of PbSe quantum dot liquid-core optical fibre temperature sensor, it is characterised in that use colloid PbSe quantum
Point, as temperature sensitive fluorescence material, makes the colloid PbSe quantum dot wick-containing light of a kind of multiple temperature-sensing element (device) tandem compound
Fine temperature-sensing element (device), and design a kind of fibre optic temperature sensor being applicable to achieving multipoint temperature detection based on this kind of sensing element,
The manufacture method of PbSe quantum dot liquid-core optical fibre temperature sensor is as follows:
The first step, the colloid PbSe quantum dot of selected sizes: choose photodetector, it is desirable to colloid PbSe quantum dot
The optical signal of liquid-core optical fibre sensing element output, i.e. the emission spectrum centre wavelength of colloid PbSe quantum dot, falls in photodetection
The central area of device response spectrum；After absorption spectrum the first exciton absorption peak center wavelength of selected colloid PbSe quantum dot, root
According to formula 1,
Calculating corresponding colloid PbSe quantum dot size, in formula 1, λ is the absorption spectrum first of colloid PbSe quantum dot
Exciton absorption peak center wavelength, D is the size of colloid PbSe quantum dot；Tuned by size, colloid PbSe quantum dot emission light
Spectrum centre wavelength scope is to 900～2200nm；
Second step, prepare colloid PbSe quantum dot solution: according to the size of the colloid PbSe quantum dot obtained by the first step,
Prepare the colloid PbSe quantum dot solution of corresponding size, and it is mixed respectively at trichloro ethylene solution, generate colloid
PbSe quantum dot and trichloro ethylene mixed solution, i.e. colloid PbSe quantum dot temperature sensitive fluorescence material solution, its concentration according to
Actual requirement determines；
3rd step, colloid PbSe quantum dot temperature sensitive fluorescence material solution and trichloro ethylene solution are injected separately into model
In identical hollow optic fibre, and it is packaged: choose that multistage optical fiber model is identical but hollow optic fibre that length is different, fiber lengths
Determine according to actual needs；The colloid PbSe quantum dot of preparation is passed through with trichloro ethylene mixed solution and trichloro ethylene solution
Hydraulic pressure injection method is injected separately in each section of optical fiber, and the types of agents injected in optical fiber determines according to actual requirement；By every section
The port of optical fiber is by without shadow glue, i.e. Ultraviolet Rays glue is packaged, and the thickness without shadow glue is 50 μm～100 μ
m；
4th step, complete the making of colloid PbSe quantum dot liquid-core optical fibre sensing element: will use between every two sections of optical fiber
The device that is of coupled connections is attached, with inject colloid PbSe quantum dot temperature sensitive fluorescence material optical fiber, inject trichloro ethylene molten
The mode of the optical fiber of liquid is attached, and allows and injects the fiber segment ratio of the little colloid PbSe quantum dot temperature sensitive fluorescence material of size
Inject the fiber segment of larger-size colloid PbSe quantum dot temperature sensitive fluorescence material closer to optics selection system (4), extremely
This completes the making of achieving multipoint temperature detection liquid-core optical fibre sensing element；
5th step, structure colloid PbSe quantum dot liquid-core optical fibre temperature sensor: build by laser instrument (1), collimation coupling
Colloid PbSe quantum dot liquid-core optical fibre sensing element (3) of lens (2), multiple spot detection, optics selection system (4), signal conversion
The colloid PbSe quantum dot liquid-core optical fibre temperature that processing system (5), Single-chip Controlling acquisition system (6), display (7) form passes
Sensor；Wherein optics selection system (4) includes the near infrared light identical with the centre wavelength of colloid PbSe quantum dot emission spectrum
Optical filter, it is made up of the different optical filter of many groups, can pass through the position of driven by motor optical filter, to realize colloid PbSe quantum
The purpose of the peak wavelength selection of the different emission spectrum of point；Signal conversion processes system (5) includes receiving colloid PbSe quantum dot
The detector of emission spectrum wavelength, amplifier and A/D converter；Single-chip computer control system (6) includes motor, and it passes through single-chip microcomputer
Motor is sent instruction, thus controls the conversion of optical filter.
2, described multiple colloid PbSe quantum dot liquid-core optical fibre temperature-sensing element (device)s use sizes colloid respectively
PbSe quantum dot is as temperature sensitive fluorescence material, and the centre wavelength of sizes colloid PbSe quantum dot emission spectrum needs to protect
Hold certain intervals, it is to avoid the overlap of spectral signal occurs, affects the precision of temperature detection.
3, selected glue without shadow can pass through near infrared light and visible ray, and plays the effect of sealing；Selected three
Vinyl chloride solution plays the effect of total reflection, and does not absorb visible ray and near infrared light.
4, the concentration by injecting colloid PbSe quantum dot adjusts in colloid PbSe quantum dot liquid-core optical fibre sensing element
The emissive porwer of PbSe quantum dot, thus the output voltage of control system.
5, the temperature checking method of a kind of PbSe quantum dot liquid-core optical fibre temperature sensor, it is characterised in that propose one
Achieving multipoint temperature detection method based on colloid PbSe liquid-core optical fibre temperature sensor, concrete detection method is as follows:
The first step, making colloid PbSe liquid-core optical fibre temperature sensor；
Second step, demarcation colloid PbSe quantum dot liquid-core optical fibre temperature sensor: first choose one section and be injected with colloid
The fiber segment of PbSe quantum dot is demarcated, and heats it, and system can export a magnitude of voltage, uses platinum resistance temperature simultaneously
Temperature after the fiber segment heating of degree sensor measurement colloid PbSe quantum dot, completes the collection of one group of data；Use the method,
Multi collect data, choose one of which data as standard value, then use Digital filting, draw formula 2,
T (DEG C)=aU (V)+b
Wherein T is testee temperature, and U is the voltage of detecting system output, and a, b are constant；By measure temperature and
Magnitude of voltage, calculates a, the b in formula 2, according to value and the formula 2 of a, b, carries out colloid PbSe quantum dot liquid-core optical fibre sensitivity unit
The demarcation of this section of optical fiber in part；Then remaining fiber segment injecting other sized colloidal PbSe quantum dot is repeated above-mentioned calibrated
Journey, carries out numerical fitting respectively, draws the value organizing a, b more, bring formula 2 into, it is achieved colloid PbSe quantum dot liquid-core optical fibre temperature
The demarcation of sensor；
3rd step, application colloid PbSe quantum dot liquid-core optical fibre temperature sensor carry out achieving multipoint temperature detection: colloid PbSe
Containing multiple portions being filled with colloid PbSe quantum dot and trichloro ethylene mixed solution in quantum dot liquid-core optical fibre sensing element (3)
Point, these parts being positioned on different measured object regions, measured object region from left to right number consecutively is I, II ..., wherein
The physical quantities that can measure temperature is determined by the quantity of colloid PbSe quantum dot in optical fiber with trichloro ethylene mixed solution；Measure
The temperature of region I, opens laser instrument (1), penetrates beam of laser, and laser is entered into multiple spot detected by collimation, coupled lens (2)
Colloid PbSe quantum dot liquid-core optical fibre sensing element (3) in, multiple spot detection colloid PbSe quantum dot liquid-core optical fibre sensitivity unit
Part (3) is excited given off infrared light via optics selection system (4), signal conversion processes system (5), Single-chip Controlling
After system (6), display (7) exports reading；Now, the optical filter in optics selection system (4) filters out and wick-containing light
The wavelength that in fine sensing element, the centre wavelength of colloid PbSe quantum dot emission spectrum is inconsistent；Finally, application formula 2 calculates
Go out the real time temperature of region I；When measuring the temperature of region II, Single-chip Controlling acquisition system (6) sends instruction to motor, electricity
Machine drives optical filter to rotate, and the colloid PbSe quantum dot of the centre wavelength and detection region II fiber segment that are rotated into emission spectrum is sent out
Penetrate the optical filter that the centre wavelength of spectrum is consistent, re-use said method and measure the temperature of region II, realize according to said method
The detection of multi-zone temperature.
6, described colloid PbSe quantum dot the most still has temperature size-dependent, as the colloid PbSe chosen
Quantum dot size is certain, and the intensity of its emission spectrum and temperature have relation one to one, and both are linear, therefore light
After signal is converted to the signal of telecommunication by detector, temperature is the most linear with system output voltage.
Compared with prior art, the invention has the beneficial effects as follows:
1, the making of PbSe quantum dot liquid-core optical fibre temperature sensor of the present invention and temperature checking method, used
Fluorescent material low cost, length in service life, high quantum production rate；
2, the making of PbSe quantum dot liquid-core optical fibre temperature sensor of the present invention and temperature checking method, designed
System can realize the detection of multi-point temp；
3, the making of PbSe quantum dot liquid-core optical fibre temperature sensor of the present invention and temperature checking method, designed
System cost of manufacture is low, simple in construction, good stability.
Accompanying drawing explanation
Fig. 1 is the liquid-core optical fibre sensing element manufacture method flow chart of the present invention；
Fig. 2 is the colloid PbSe quantum dot liquid-core optical fibre sensing element schematic diagram of 2 detections of the present invention；
Fig. 3 is that 3.41nm colloid PbSe quantum dot solution absorption spectrum and the spectral radiation curves figure of the present invention are (in room temperature
Under record) and electron microscope picture；
Fig. 4 is that 4.06nm colloid PbSe quantum dot solution absorption spectrum and the spectral radiation curves figure of the present invention are (in room temperature
Under record) and electron microscope picture；
Fig. 5 is the temperature sensor schematic diagram of the present invention；
Fig. 6 is the temperature checking method flow chart of the present invention；
Fig. 7 is that (after the optical filter selection) of the 3.41nm colloid PbSe quantum dot liquid-core optical fibre sensing element of the present invention is launched
Intensity and temperature relation figure (in figure, the temperature curve in upper right corner expression figure is arranged in order from bottom to top)；
Fig. 8 is that (after the optical filter selection) of the 4.06nm colloid PbSe quantum dot liquid-core optical fibre sensing element of the present invention is launched
Intensity and temperature relation figure (in figure, the temperature curve in upper right corner expression figure is arranged in order from bottom to top)；
Fig. 9 is the voltage of the temperature sensor of the present invention, testee temperature and 3.41nm colloid PbSe quantum dot wick-containing
(after optical filter selection) fitting a straight line figure of optical fiber sensing element；
The voltage of the temperature sensor of Figure 10 present invention, testee temperature and 4.06nm colloid PbSe quantum dot wick-containing light
Fine (after optical filter selection) fitting a straight line figure；
The two point form temperature sensor overhaul flow chart of Figure 11 present invention.
In figure: 1. laser instrument；2. collimation coupled lens；3. colloid PbSe quantum dot liquid-core optical fibre sensing element；4. optics
Selection system；5. signal conversion processes system；6. Single-chip Controlling acquisition system；7. display；A. three filter vinyl solutions it are filled with
Optical fiber；B. optical-fiber coupling connector；C. the light of specific dimensions 1 colloid PbSe quantum temperature sensitive fluorescence material solution it is filled with
Fine；D. the optical fiber of specific dimensions 2 colloid PbSe quantum temperature sensitive fluorescence material solution it is filled with.
Detailed description of the invention
Further illustrate detailed content and the detailed description of the invention thereof of the present invention below in conjunction with the accompanying drawings, but the protection of the present invention
Scope is not limited to following embodiment.
The embodiment of the present invention is to two point form colloid PbSe quantum dot liquid-core optical fibre temperature sensor and 2 temperature detection thereof
Method is illustrated.
One, Fig. 1 and Fig. 2 is combined, the liquid-core optical fibre sensing element of colloid 2 temperature of PbSe quantum dot of the present invention
Manufacture method and the manufacture method of two point form colloid PbSe quantum dot liquid-core optical fibre temperature sensor as follows:
The first step, the size of selected 2 kinds of colloid PbSe quantum dots.The present invention chooses In0.53Ga0.47As/InP PIN photoelectricity
Diode is as detector, and it can receive wavelength is 1000nm～1650nm.Owing to 2 are detected by the present embodiment, therefore
Choose colloid PbSe quantum dot and the colloid PbSe quantum dot of 1387nm that emission center wavelength is 1193nm, in conjunction with Fig. 3 and Tu
4, it is received spectrum the first exciton absorption peak center wavelength and is respectively λ=1104nm and λ=1313nm.Calculate respectively according to formula 1
The dimension D drawing colloid PbSe quantum dot is 3.41nm and 4.06nm.
Second step, prepare the colloid PbSe quantum dot solution of a size of 3.41nm and 4.06nm, its colloid PbSe quantum dot
As shown in Figure 3 and Figure 4.The ODE of the PbO (4.000mmol) of 0.892g, the OA (8.000mmol) and 12.848g of 2.600g is filled
Entering there-necked flask, in the environment of nitrogen is protected, mixed solution is heated to 170 DEG C, until PbO all dissolves, solution fades to nothing
Color, configuration quality ratio is the Se-TBP solution of 10% afterwards, takes out in the reaction solution that 6.4g is injected into rapidly quickly stirring, temperature
Degree declines rapidly and is maintained at 140 DEG C, allows colloid PbSe Quantum Dots Growth 4 minutes at this temperature, injects the most rapidly
The room-temperature toluene solution of amount, puts out reaction, finally uses chloroform-methanol extraction, and deposits with acetone, by colloid PbSe quantum
Point purification, makes colloid PbSe quantum dot solution.Choosing concentration is 7.2 × 1015QDs/cm3 (a size of 3.41nm) and 7.8 ×
1015QDs/cm3 (a size of 4.06nm) colloid PbSe quantum dot solution mixes with trichloro ethylene respectively, i.e. colloid PbSe measures
Son point temperature sensitive fluorescence material solution.
3rd step, colloid PbSe quantum dot temperature sensitive fluorescence material solution and trichloro ethylene solution are injected separately into type
In number identical hollow optic fibre, and it is packaged.Choosing five sections of internal diameters and external diameter is respectively 100 μm, the optical fiber of 200 μm, it is long
Degree 60cm, 60cm, 20cm, 40cm, 20cm respectively.Mixed solution is injected into the light of two 20cm by the method using hydraulic pressure to inject
In fibre, then using same method to be filled in remaining optical fiber by trichloro ethylene solution, all fiber ports use without shadow
Glue is packaged, and the package thickness without shadow glue is 51 μm.
4th step, complete the making of colloid PbSe quantum dot liquid-core optical fibre sensing element: by the device that is of coupled connections with 60cm
Optical fiber, 20cm optical fiber (the colloid PbSe quantum dot of a size of 4.06nm), 40cm optical fiber, 20cm optical fiber be (a size of 3.41nm's
Colloid PbSe quantum dot), the mode of 60cm optical fiber be attached, complete the system of the liquid-core optical fibre sensing element of 2 temperature detection
Make.
5th step, combine Fig. 5, build two point form colloid PbSe quantum dot liquid-core optical fibre temperature sensor.Two point form colloid
The structure of PbSe quantum dot liquid-core optical fibre temperature sensor includes: wavelength be 532nm laser instrument, collimating lens, coupled lens, two
Point type colloid PbSe quantum dot liquid-core optical fibre sensing element, centre wavelength be 1193nm (scope is 1095～1291nm) and
1387nm (scope is 1287nm～1487nm) rotary type optical filter, In0.53Ga0.47As/InP PIN photodiode, amplification
Device, A/D converter, single-chip microcomputer, motor, display.
Two, combining Fig. 5 and Fig. 6, the present invention constructs based on two point form colloid PbSe quantum dot liquid-core optical fibre temperature sensing
Device, its temperature checking method is as follows:
The first step, structure two point form colloid PbSe quantum dot liquid-core optical fibre temperature sensor.
Second step, demarcation two point form colloid PbSe quantum dot liquid-core optical fibre temperature sensor.In conjunction with Fig. 7 and Fig. 8, due to
3.41nm and 4.06nm colloid PbSe quantum dot has temperature size-dependent (after having been injected into optical fiber), its emission spectrum
Intensity is linear with temperature.The scaling method of two point form colloid PbSe quantum dot liquid-core optical fibre temperature sensor is as follows: right
It is injected with two sections of region heating of optical fiber of colloid PbSe quantum dot, respectively obtains the output voltage of two sections, use platinum resistance temperature
The temperature after the fiber segment heating of colloid PbSe quantum dot measured by sensor (1/6B level), completes the measurement of one group of data.Respectively
Gather 7 groups of data, use Digital filting, obtain formula 3, formula 4, the data gathered as shown in table 1, table 2, two point form glue
Two sections of colloid PbSe quantum dot numerical fitting curves such as Fig. 9 and Figure 10 institute of body PbSe quantum dot liquid-core optical fibre temperature sensor
Show.Wherein in formula 3, the span of U is 1.21～2.27V, and in formula 4, the span of U is 1.20～2.30V.Two point form
Colloid PbSe quantum dot liquid-core optical fibre calibration of sensor completes.
T (DEG C)=-85.0U (V)+193.13 formula 3
T (DEG C)=-90.9U (V)+208.17 formula 4
Table 1 demarcate two point form colloid PbSe quantum dot liquid-core optical fibre temperature sensor tables of data (a size of 3.41nm's
Colloid PbSe quantum dot)
| Temperature (DEG C) | 10.2 | 23.2 | 30.0 | 40.8 | 50.9 | 61.0 | 88.9 |
| Voltage (V) | 2.15 | 2.00 | 1.88 | 1.75 | 1.62 | 1.48 | 1.16 |
Table 2 demarcate two point form colloid PbSe quantum dot liquid-core optical fibre temperature sensor tables of data (a size of 4.06nm's
Colloid PbSe quantum dot)
| Temperature (DEG C) | 9.40 | 22.8 | 31.6 | 40.6 | 50.5 | 59.6 | 90.8 |
| Voltage (V) | 2.16 | 2.00 | 1.96 | 1.89 | 1.75 | 1.64 | 1.27 |
3rd step, combining Figure 11, application two point form colloid PbSe quantum dot liquid-core optical fibre temperature sensor carries out at 2
Temperature detection.When the position being full of 3.41nm and 4.06nm colloid PbSe quantum dot in optical fiber being heated any in atmosphere simultaneously
Between.Opening wavelength is that laser launched by 532nm laser instrument, and laser enters into two point form colloid PbSe quantum by collimation coupled lens
Point liquid-core optical fibre sensing element in, use single-chip microcomputer to motor send instruction, first by centre wavelength be 1193nm optical filter rotate
To the position of reception optical signal, the optical signal after filtration is via In0.53Ga0.47As/InP PIN photodiode is converted to telecommunications
Number, after amplifier amplification, A/D converter, single-chip microcomputer it is acquired and data process, be transferred in display present reading
Number, this temperature is the temperature of heating at 3.41nm.Re-use single-chip microcomputer and send instruction to motor, be 1387nm filter by centre wavelength
Mating plate rotates to receive the position of optical signal, and the optical signal after filtration is via In0.53Ga0.47As/InP PIN photodiode turns
Being changed to the signal of telecommunication, after amplifier amplification, A/D converter, single-chip microcomputer collection and data process, and are transferred in display present
Reading, this temperature is the temperature of heating at 4.06nm.So far the detection of 2 temperature is achieved.
Three, test result
In order to verify two point form (a size of 3.41nm and 4.06nm) the colloid PbSe quantum dot liquid-core optical fibre temperature of the present invention
Degree sensor feasibility, simultaneously use the present invention build two point form colloid PbSe quantum dot liquid-core optical fibre temperature sensor,
2 heating regions are measured by platinum resistance temperature sensor (1/6B level), and wherein region I is injected with 4.06nm in using optical fiber
The sensing location of Colloidal Quantum Dots measures, and region II uses the sensing location being injected with 3.41nm Colloidal Quantum Dots in optical fiber
Measuring, and contrast with platinum resistance temperature sensor (1/6B level) respectively, measurement result is as shown in table 3.
Table 3 temperature measurement result contrast table
| Heating region I | 1 | 2 | 3 | 4 | 5 | 6 |
| Platinum resistance measured value (DEG C) | 3.25 | 15.50 | 38.20 | 59.93 | 73.25 | 82.76 |
| Native system measured value (DEG C) | 3.2 | 15.6 | 38.1 | 59.9 | 73.2 | 82.8 |
| Deviation (DEG C) | 0.05 | -0.10 | 0.10 | 0.03 | 0.05 | -0.04 |
| Heating region II | 1 | 2 | 3 | 4 | 5 | 6 |
| Platinum resistance measured value (DEG C) | 3.68 | 16.04 | 41.00 | 62.44 | 76.21 | 88.65 |
| Native system measured value (DEG C) | 3.6 | 16.0 | 41.1 | 62.5 | 76.2 | 88.6 |
| Deviation (DEG C) | 0.08 | 0.04 | -0.10 | -0.06 | 0.01 | 0.05 |
Draw according to above-mentioned data, two point form (a size of 3.41nm and 4.06nm) colloid PbSe quantum dot liquid-core optical fibre temperature
Degree sensor is less than ± 0.1 DEG C relative to platinum resistance temperature sensor, deviation, it was demonstrated that method of the present invention is feasible.
Claims (6)
- The manufacture method of 1.PbSe quantum dot liquid-core optical fibre temperature sensor, it is characterised in that use colloid PbSe quantum dot to make For temperature sensitive fluorescence material, the colloid PbSe quantum dot liquid-core optical fibre making a kind of multiple temperature-sensing element (device) tandem compound is quick Sensing unit, and design a kind of fibre optic temperature sensor being applicable to achieving multipoint temperature detection, PbSe quantum based on this kind of sensing element The manufacture method of some liquid-core optical fibre temperature sensor is as follows:The first step, the colloid PbSe quantum dot of selected sizes: choose photodetector, it is desirable to colloid PbSe quantum dot wick-containing The optical signal of optical fiber sensing element output, i.e. the emission spectrum centre wavelength of colloid PbSe quantum dot, fall and ring at photodetector Answer the central area of spectrum；After absorption spectrum the first exciton absorption peak center wavelength of selected colloid PbSe quantum dot, according to public affairs Formula 1,Calculating corresponding colloid PbSe quantum dot size, in formula 1, λ is absorption spectrum first exciton of colloid PbSe quantum dot Absworption peak centre wavelength, D is the size of colloid PbSe quantum dot；Tuned by size, in colloid PbSe quantum dot emission spectrum Heart wave-length coverage is to 900～2200nm；Second step, prepare colloid PbSe quantum dot solution: according to the size of the colloid PbSe quantum dot obtained by the first step, preparation The colloid PbSe quantum dot solution of corresponding size, and it is mixed respectively at trichloro ethylene solution, generate colloid PbSe amount Son point and trichloro ethylene mixed solution, i.e. colloid PbSe quantum dot temperature sensitive fluorescence material solution, its concentration range is 4.5 × 1015QDs/cm3～2.5 × 1016QDs/cm3；3rd step, that with trichloro ethylene solution, colloid PbSe quantum dot temperature sensitive fluorescence material solution is injected separately into model is identical Hollow optic fibre in, and be packaged: choose that multistage optical fiber model is identical but hollow optic fibre that length is different；Colloid by preparation PbSe quantum dot is injected separately into each section of light with trichloro ethylene mixed solution and trichloro ethylene solution by hydraulic pressure injection method In fibre；By the port of every section of optical fiber by without shadow glue, i.e. Ultraviolet Rays glue is packaged, without the thickness of shadow glue It is 50 μm～100 μm；4th step, complete the making of colloid PbSe quantum dot liquid-core optical fibre sensing element: coupling between every two sections of optical fiber, will be used Adapter is attached, to inject the optical fiber of colloid PbSe quantum dot temperature sensitive fluorescence material, to inject trichloro ethylene solution The mode of optical fiber is attached, and allows the fiber segment ratio injecting the little colloid PbSe quantum dot temperature sensitive fluorescence material of size inject The fiber segment of larger-size colloid PbSe quantum dot temperature sensitive fluorescence material is closer to optics selection system (4), the completeest Become the making of achieving multipoint temperature detection liquid-core optical fibre sensing element；5th step, structure colloid PbSe quantum dot liquid-core optical fibre temperature sensor: build by laser instrument (1), collimation coupled lens (2), colloid PbSe quantum dot liquid-core optical fibre sensing element (3), optics selection system (4), signal conversion processes system (5), list The colloid PbSe quantum dot liquid-core optical fibre temperature sensor that sheet machine controls acquisition system (6), display (7) forms；Wherein optics Selection system (4) includes the near infrared light optical filter identical with the centre wavelength of colloid PbSe quantum dot emission spectrum, and it is by many Group different optical filter composition, can be by the position of driven by motor optical filter, to realize colloid PbSe quantum dot difference is launched light The purpose of the peak wavelength selection of spectrum；Signal conversion processes system (5) includes receiving colloid PbSe quantum dot emission spectral wavelength Detector, amplifier and A/D converter；Single-chip Controlling acquisition system (6) includes motor, and motor is sent out by it by single-chip microcomputer Go out instruction, thus control the conversion of optical filter.
- The manufacture method of PbSe quantum dot liquid-core optical fibre temperature sensor the most according to claim 1, it is characterised in that institute The multiple colloid PbSe quantum dot liquid-core optical fibre sensing elements stated use sizes colloid PbSe quantum dot as temperature respectively Sensitive fluorescence material, the centre wavelength of sizes colloid PbSe quantum dot emission spectrum needs to keep certain intervals, it is to avoid send out The overlap of third contact of a total solar or lunar eclipse spectrum signal, affects the precision of temperature detection.
- The manufacture method of PbSe quantum dot liquid-core optical fibre temperature sensor the most according to claim 1, it is characterised in that institute The glue without shadow chosen can pass through near infrared light and visible ray, and plays the effect of sealing；Selected trichloro ethylene solution rises To the effect of total reflection, and do not absorb visible ray and near infrared light.
- The manufacture method of PbSe quantum dot liquid-core optical fibre temperature sensor the most according to claim 1, it is characterised in that logical Cross and inject the concentration of colloid PbSe quantum dot and adjust sending out of PbSe quantum dot in colloid PbSe quantum dot liquid-core optical fibre sensing element Penetrate intensity, thus the output voltage of control system.
- 5. the temperature checking method of a PbSe quantum dot liquid-core optical fibre temperature sensor, it is characterised in that propose a kind of based on The achieving multipoint temperature detection method of colloid PbSe liquid-core optical fibre temperature sensor, concrete detection method is as follows:The first step, making colloid PbSe liquid-core optical fibre temperature sensor；Second step, demarcation colloid PbSe quantum dot liquid-core optical fibre temperature sensor: first choose one section and be injected with colloid PbSe amount The fiber segment of son point is demarcated, and heats it, and system can export a magnitude of voltage, uses platinum resistance temperature sensing simultaneously The temperature after the fiber segment heating of colloid PbSe quantum dot measured by device, completes the collection of one group of data；Use the method, repeatedly adopt Collection data, choose one of which data as standard value, then use Digital filting, draw formula 2,T (DEG C)=aU (V)+bWherein T is testee temperature, and U is the voltage of detecting system output, and a, b are constant；By the temperature measured and voltage Value, calculates a, the b in formula 2, according to value and the formula 2 of a, b, carries out in colloid PbSe quantum dot liquid-core optical fibre sensing element The demarcation of this section of optical fiber；Then remaining fiber segment injecting other sized colloidal PbSe quantum dot is repeated above-mentioned calibration process, Carry out numerical fitting respectively, draw the value organizing a, b more, bring formula 2 into, it is achieved colloid PbSe quantum dot liquid-core optical fibre temperature sensing The demarcation of device；3rd step, application colloid PbSe quantum dot liquid-core optical fibre temperature sensor carry out achieving multipoint temperature detection: colloid PbSe quantum Containing multiple parts being filled with colloid PbSe quantum dot and trichloro ethylene mixed solution in some liquid-core optical fibre sensing element (3), These parts being positioned on different measured object regions, measured object region from left to right number consecutively is I, II ..., Qi Zhongneng The physical quantities enough measuring temperature is determined by the quantity of colloid PbSe quantum dot in optical fiber with trichloro ethylene mixed solution；Measurement region The temperature of territory I, opens laser instrument (1), penetrates beam of laser, and laser enters into multiple spot detection by collimation coupled lens (2) In colloid PbSe quantum dot liquid-core optical fibre sensing element (3), the colloid PbSe quantum dot liquid-core optical fibre sensing element of multiple spot detection (3) the given off infrared light that is excited is adopted via optics selection system (4), signal conversion processes system (5), Single-chip Controlling After collecting system (6), display (7) exports reading；Now, the optical filter in optics selection system (4) filters out and wick-containing The wavelength that in optical fiber sensing element, the centre wavelength of colloid PbSe quantum dot emission spectrum is inconsistent；Finally, application formula 2 calculates Draw the real time temperature of region I；When measuring the temperature of region II, Single-chip Controlling acquisition system (6) sends instruction to motor, Driven by motor optical filter rotates, and is rotated into the centre wavelength of emission spectrum and the colloid PbSe quantum dot of detection region II fiber segment The optical filter that the centre wavelength of emission spectrum is consistent, re-uses said method and measures the temperature of region II, real according to said method The detection of existing multi-zone temperature.
- The temperature checking method of a kind of PbSe quantum dot liquid-core optical fibre temperature sensor the most according to claim 5, it is special Levying and be, described colloid PbSe quantum dot the most still has temperature size-dependent, when the colloid PbSe amount chosen Sub-spot size is certain, and the intensity of its emission spectrum and temperature have relation one to one, and both are linear, therefore light letter After number being converted to the signal of telecommunication by detector, temperature is the most linear with system output voltage.
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| CN106768406B (en) * | 2016-11-24 | 2019-03-26 | 哈尔滨工业大学 | A kind of cell temperature measuring system |
| CN108169428B (en) * | 2017-12-29 | 2020-11-27 | 华南师范大学 | Formaldehyde gas, humidity and temperature integrated monitoring equipment |
| CN109990915B (en) * | 2017-12-29 | 2020-09-22 | Tcl科技集团股份有限公司 | Temperature measuring method |
| CN110220612B (en) * | 2019-05-29 | 2020-12-01 | 华南师范大学 | Temperature sensor of hollow microstructure optical fiber and preparation method thereof |
| CN110702264B (en) * | 2019-10-31 | 2024-09-17 | 浙江光塔安全科技有限公司 | Detection system for quantum dot optical fiber illumination |
| CN113295383B (en) * | 2021-04-29 | 2022-12-20 | 深圳市格莱特通信技术有限公司 | Bootstrap fiber connector |
| CN113174652A (en) * | 2021-04-30 | 2021-07-27 | 安徽大学 | Method for coaxially printing quantum dot hydrogel optical fiber and multi-parameter sensing application |
| CN113551800A (en) * | 2021-07-06 | 2021-10-26 | 安徽大学 | Method for manufacturing quantum dot optical fiber sensing probe based on ink-jet printing technology |
| CN116380032B (en) * | 2023-02-07 | 2023-08-18 | 中国船舶集团有限公司第七〇七研究所 | Optical fiber gyro and temperature self-compensation method thereof |
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