CN105890795A - Temperature field single spectrum detection method - Google Patents
Temperature field single spectrum detection method Download PDFInfo
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- CN105890795A CN105890795A CN201610216602.XA CN201610216602A CN105890795A CN 105890795 A CN105890795 A CN 105890795A CN 201610216602 A CN201610216602 A CN 201610216602A CN 105890795 A CN105890795 A CN 105890795A
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- temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/20—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using thermoluminescent materials
Abstract
The present invention relates to the fluorescence temperature measurement field, in particular to a temperature field single spectrum detection method. The core parts of the present invention are that a plurality of temperature sensitive fluorescent materials having different intrinsic luminescent characteristics form a plurality of point temperature sensors, excitation light irradiates to the temperature detection points, and the fluorescence emitted by the different fluorescent materials is converged or beam combined, then enters a spectrograph and is superposed and recorded in a same emission spectrum; the spectrum carries the temperature information of the detection points, the non-interfering temperature-sensitive fluorescence characteristics of the fluorescent materials are selected from the spectrum, and the real-time temperatures of the fluorescent materials at the detection points are analyzed based on the temperature-sensitive functions of the fluorescence characteristics. The real-time temperature field information can be used to monitor a heat flux process and analyze the temperature uniformity of a tested surface.
Description
Technical field
The present invention relates to fluorescence field of temperature measurement, be specifically related to a kind of method obtaining temperature distribution information by single fluorescence spectral measuring.
Background technology
Fluorescence thermometry have immune electromagnetic interference, noncontact, can the long-range typical advantages such as measurement.Common fluorescence thermometry has fluorescence intensity ratio (fluorescence intensity ratio, FIR) method and fluorescence lifetime (fluorescence lifetime, FL) method two kinds, the former uses thermal coupling dual intensity level to the transition luminescence strength ratio of same lower energy level as transducing signal；The latter's physical mechanism based on temperature quenching fluorescence.FIR method can expand to the situation of broadband spectral, selected two wavelength or wave band on bands of a spectrum, the ratio of the fluorescence intensity of they correspondences also has corresponding temperature sensing function (strength ratio temp measuring method based on broadband fluorescence spectrum, application number: 201510570466.X).Additionally, bands of a spectrum or the position of spectral line and full width at half maximum can also be as temperature sensor signals: the general regular underground heat broadening of spectral peak full width at half maximum；Peak wavelength or bands of a spectrum center of gravity are with temperature frequency displacement (a kind of broadband fluorescence spectroscopic temperature measurement method, application number: 201510570556.9).
The sensing technology that temperature distributing measuring in the present invention is used can be based on but be not limited to the combination of above-mentioned any means, but the different transducing signals being subordinate to different fluorescent material being applied in combination should distinguishable, do not interfere with each other.
Summary of the invention
The method that present invention aim at providing a kind of single spectrum detection temperature field, the method has only to a spectrogrph just can obtain the real time temperature distributed intelligence of different detecting location in single measurement simultaneously.While saving measurement equipment cost, the Rapid Variable Design in temperature field can be detected.Measurement result may be used for monitoring heat flux process, temperature homogeneity.
Technical solution of the present invention is as follows: the method in a kind of single spectrum detection temperature field, it is characterized in that: the multiple point-like temperature sensitive fluorescence materials using temperature sensitivity intrinsic luminescence feature to differ are laid in tested region, constitute the some temperature sensor of multiple fluorescence type, excitation light irradiation is on each temperature sensing point, the fluorescence that the different fluorescent material of each point sends is concentrated or enters spectrogrph after closing bundle, superposition record is on same emission spectrum, this spectrum carries the temperature information of each sensing point, from spectrally choosing the non-interfering temperature sensitive fluorescent characteristics of each fluorescent material, temperature sensitive Function Solution based on each fluorescent characteristics separates out the real time temperature of sensing point residing for each fluorescent material.
The fluorescence of each sensing point of the present invention is recorded simultaneously on same fluorescence emission spectrum, and each fluorescent characteristics does not interfere with each other.
Intrinsic luminescence feature of the present invention includes but not limited to that bands of a spectrum center of gravity wavelength, spectral peak wavelength, fluorescence intensity ratio, spectral peak full width at half maximum, total light intensity of arbitrary fluorescent material luminescence are not belonging to described intrinsic characteristics.
The temperature information of sensing point of the present invention is obtained in real time by the temperature sensing function of corresponding fluorescent material, and the temperature sensing function of each fluorescent material is demarcated the most in advance.
Temperature sensitive fluorescence material of the present invention is that point-like thermally contacts with described each sensing point, and described fluorescent material includes but not limited to rare earth ion doped luminescent material, transient metal doped luminescent material, semiconductors coupling luminescent material, luminous organic material；The spatial resolution of Temperature Distribution depends on size and the spacing distance of each point of used phosphor shots.
The essence of the present invention is that each respective luminescence feature of temperature sensitive fluorescence material can be distinguished in the same spectrum of single measurement, the temperature of the different position to be measured of luminescence feature correspondence of different fluorescent materials.
Beneficial effects of the present invention a: spectrogrph can be used to obtain temperature distribution information by single fluorescence spectral measuring, therefore there is real-time, quick, the advantage of low cost.May be used for the detection in real time in temperature field and control, such as monitoring the temperature homogeneity of heat flux process, accurate device.
Accompanying drawing explanation
Fig. 1 is the test system schematic (only using two some temperature sensing of A, B as example) of the present invention.
Fig. 2 is the exemplary spectroscopy in the fluorescence sense temperature field of the present invention.In figure, A, B instruction belongs to the fluorescence of A, B point in test system.Spectra all rises in each point temperature, but records under the constant control condition of A, B point temperature difference.
Fig. 3 is the result in the single spectrum detection temperature field of the present invention, have recorded example points A, the change of B Temperature Distribution.Two some temperature sensing functions of A, B are indicated on figure, the temperature characterisitic of the prior each fluorescent material of each self-calibration obtain.
Detailed description of the invention
The technology of the present invention content part describes a kind of method obtaining temperature distribution information by single fluorescence spectral measuring.Comprise the following steps that (as a example by two kinds of temperature-sensitive material sensings of different iridescent):
Step one: using the powder of temperature sensitive blue fluorescent material A and temperature sensitive red fluorescence material B as a temperature sensor, it is known that the temperature characterisitic of each of which, they are thermally contacted with sensing point A, B respectively.Test system is as shown in Figure 1.Point temperature sensor is all used for temperature sensor signal with fluorescence intensity, and the wavelength of fluorescence each taken is the most overlapping, and from spectrally reading the intensity at each wavelength of fluorescence, that is each fluorescent characteristics for sensing does not interfere with each other.
Step 2: on excitation light irradiation to each sensing point, excitation source can difference can also obtain from same light source beam splitting.Each fluorescent material sends fluorescence, is input to a spectrogrph, the single spectrum once recorded contains the luminescence of each fluorescent material after being assembled or close bundle by the fluorescence of each point.Exemplary spectroscopy such as Fig. 2,3 spectrum in figure have recorded 3 groups of Temperature Distribution.
Step 3: spectroscopic data processes, asks for the temperature information that the fluorescence of different fluorescent material carries respectively.Example such as Fig. 3, respectively with fluorescence intensity ratioR =I (510nm)/I (470nm) andR =I (610nm)/I (570nm) is temperature sensitive blue fluorescent material A and the temperature sensor signal of temperature sensitive red fluorescence material B, strength vs. temperature sensing function according to each fluorescent material known to sign in figure, can obtain the temperature information of the different sensing points that fluorescence spectrum is carried.Figure illustrates totally 14 groups of temperature profile datas.
Sensing point temperature distribution information can also can be obtained equally by the relation of the emission band center of gravity of other temperature sensing functions, such as A, B with temperature.Utilizable temperature sensor signal be not limited to referred herein to fluorescence intensity ratio, this two classes fluorescent characteristics of bands of a spectrum center of gravity.
Step 4: when needed, deals with temperature profile data again, such as calculus of differences, can obtain the monitoring signal of thermal equilibrium state.
Claims (5)
1. the method in a single spectrum detection temperature field, it is characterized in that: use multiple temperature sensitive fluorescence materials that intrinsic luminescence feature differs, each fluorescent material is attached to different sensing points, excitation light irradiation is on each sensing point, the fluorescence that each sensing point sends is concentrated or closes entrance spectrogrph after bundle, record fluorescence emission spectrum, the each fluorescent characteristics being spectrally subordinate to different sensing point carries the temperature information of each sensing point respectively, and the temperature sensing function that each fluorescent characteristics numerical value substitutes into each fluorescent material respectively i.e. obtains real time temperature distribution.
The method in a kind of single spectrum the most according to claim 1 detection temperature field, it is characterised in that: the fluorescence of described each sensing point is recorded simultaneously on same fluorescence emission spectrum, and each fluorescent characteristics does not interfere with each other.
The method in a kind of single spectrum the most according to claim 1 detection temperature field, it is characterised in that: described intrinsic luminescence feature includes but not limited to bands of a spectrum center of gravity wavelength, spectral peak wavelength, fluorescence intensity ratio, spectral peak full width at half maximum.
The method in a kind of single spectrum the most according to claim 1 detection temperature field, it is characterised in that: the temperature information of described sensing point is obtained in real time by the temperature sensing function of corresponding fluorescent material, and the temperature sensing function of each fluorescent material is demarcated the most in advance.
The method in a kind of single spectrum the most according to claim 1 detection temperature field, it is characterized in that: described temperature sensitive fluorescence material is that point-like thermally contacts with described each sensing point, and described fluorescent material includes but not limited to rare earth ion doped luminescent material, transient metal doped luminescent material, semiconductors coupling luminescent material, luminous organic material.
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| CN110207843A (en) * | 2019-07-12 | 2019-09-06 | 南昌航空大学 | A method of discoloration display and detection temperature |
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| SU1006939A1 (en) * | 1981-06-03 | 1983-03-23 | Одесский Ордена Трудового Красного Знамени Государственный Университет Им.И.И.Мечникова | Device for measuring temperature |
| JPS649328A (en) * | 1987-07-01 | 1989-01-12 | Japan Atomic Energy Res Inst | Measurement of temperature of fluid using fluorescence |
| US6122429A (en) * | 1995-03-02 | 2000-09-19 | Northwestern University | Rare earth doped barium titanate thin film optical working medium for optical devices |
| JP4983355B2 (en) * | 2007-04-10 | 2012-07-25 | 株式会社デンソー | Temperature measuring method or electronic device temperature measuring apparatus |
| WO2012144895A1 (en) * | 2011-04-20 | 2012-10-26 | Rijksuniversiteit Groningen | Measuring a spatio-temporal temperature profile of an object |
| CN102584873B (en) * | 2012-02-15 | 2015-07-15 | 浙江大学 | Double rare earth metal-organic framework material for temperature detection and synthesis method thereof |
| CN103575422B (en) * | 2013-11-13 | 2016-01-20 | 清华大学 | A kind of based on the thermometry of trivalent rare earth iron-based oxide as temperature sensing material |
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