CN110186587A - A kind of fluorescence temp measuring method - Google Patents
A kind of fluorescence temp measuring method Download PDFInfo
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- CN110186587A CN110186587A CN201910626850.5A CN201910626850A CN110186587A CN 110186587 A CN110186587 A CN 110186587A CN 201910626850 A CN201910626850 A CN 201910626850A CN 110186587 A CN110186587 A CN 110186587A
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- temperature
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- liquid
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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
- G01K11/006—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using measurement of the effect of a material on microwaves or longer electromagnetic waves, e.g. measuring temperature via microwaves emitted by the object
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- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The present invention relates to a kind of fluorescence temp measuring method, the method for the fluorescence intensity measurement temperature using liquid is mainly illustrated.Have fluorescent liquid to expand with heat and contract with cold, liquid-column height above liquid hopper changes therewith, under the irradiation of uniform exciting light, the total fluorescence intensity of fluid column changes corresponding to temperature or temperature change also can reflect as the variation of fluid column total fluorescence intensity and excitating light strength ratio.This method has many advantages, such as that safe and reliable, immune electromagnetic interference, signal can be wirelessly transferred, can visually observe and judge real time temperature.
Description
Technical field
The present invention relates to a kind of methods of optical-wireless measurement temperature, and in particular to a kind of fluorescence temp measuring method.
Background technique
Thermometry includes the types such as expansion type thermometric, electricity quantity type thermometric and photoelectricity, thermocolour thermometric, wherein expansion
Formula temperature measuring device have the advantages that it is simple and reliable, low in cost, usage mode be usually naked eyes direct-reading body expansion or line expansion
On the one hand there is the possibility of electric discharge, be unsuitable in fuel gas ring in corresponding indicating graduation but if being converted to electric signal output
Using such as mine, oil-gas pipeline in border；On the other hand there are electromagnetic interferences, are unsuitable for the temperature of strong-electromagnetic field environment such as transformer equipment
Degree measurement.
The present invention by expansion type thermometry in conjunction with fluorescence phenomenon, retain expansion type thermometry the advantages of while have
Have a typical advantages of optical measuring technique, including immune electromagnetic interference, can be with wireless measurement etc..
Summary of the invention
The object of the present invention is to provide a kind of optics temp measuring methods using fluorescence carrying temperature signal, with expansion type
The advantages of thermometric and optical measurement technology.Fluorescence temp measuring method of the invention is different from common fluorescence lifetime method using fluorescence
Temperature quenching mechanism thermometric, but expanding with heat and contract with cold using the liquid for generating fluorescence, make the liquid-column height above liquid hopper
Variation, to make the total fluorescence intensity of fluid column and the ratio of excitating light strength under stable and uniform shooting condition change, finally
The ratio value depends linearly on temperature value.This method not only can be by fluorescence wireless monitor temperature, but also can visually see
It examines liquid-column height and judges temperature level.This method can also be directly realized by the fluorescence type sensing of liquid level.
Technical solution of the present invention is as follows: a kind of fluorescence temp measuring method, it includes being based on fluorescent liquid material, in known temperature
The fluorescent intensity of the fluid column of lower record expansion, and compared with incident excitating light strength, fitting gained intensity ratio varies with temperature
Rule, obtain temperature sensing equation, will be measured under unknown temperatures intensity than substitute into sensing equation, learn dut temperature；It is special
Sign is that method and step is as follows:
Step 1: fluorescent liquid material is filled hopper, enter connection hopper with the liquid that environment temperature is increased and expanded
Vacuum glass capillary formed fluid column；
Step 2: measuring and recording the fluorescent intensity of fluid column in capillary, the temperature sensing curve of the fluorescent material is demarcated；Tool
Steps are as follows for body；
Setting changes environment temperature locating for solution to step 2-1. gradually in certain temperature range；
Step 2-2. measures and records the fluorescence intensity of solution at each temperature described in step 2-1；
Step 2-3. calculates the fluorescence intensity of solution and the intensity ratio of incident intensity；
Step 2-4. is fitted to obtain intensity described in step 2-3 than the relation function with temperature；
Step 3: the fluorescent liquid material is placed in unknown temperatures environment, the fluorescence of fluid column is inspired, the fluorescence for recording it is strong
Degree and incident intensity substitute by the obtained relation function of step 2-4, obtain temperature value to be measured.
The size of the height reflection temperature of the fluid column, can visually observe its height to determine temperature value, which is
Conventional expansion type thermometric mode.
When exciting light equably irradiates the entire capillary, including the space that do not filled by fluid column, the fluid column
Fluorescence is gone out by uniform excitation, the overall strength of fluorescence is proportional to liquid-column height.Used fluorescent liquid material is at this
Temperature quenching effect must not be significant in the temperature limit of scheme.
It is linear dependence between the total fluorescence intensity of the fluid column and the ratio of excitating light strength and temperature.Even if swashing
Luminous intensity fluctuation nor affects on this dependence.
No matter liquid level has irrelevant, described method that can also be only used for detecting the height of fluid column, that is, liquid level with temperature,
Regardless of whether the variation of liquid level is caused by temperature change.
Beneficial effects of the present invention: the method for mainly illustrating the fluorescence intensity measurement temperature using liquid has fluorescence
Liquid expand with heat and contract with cold, the liquid-column height above liquid hopper changes therewith, uniform exciting light irradiation under, fluid column
Total fluorescence intensity change or temperature change also can reflect as fluid column total fluorescence intensity and excitation light intensity corresponding to temperature
The variation of degree ratio.There is this method safe and reliable, immune electromagnetic interference, signal can be wirelessly transferred, can visually observe and sentence
The advantages that disconnected real time temperature.
Detailed description of the invention
Fig. 1 is the corresponding a kind of sensor-based system topology example schematic diagram of fluorescence temp measuring method of the invention.
In figure: 1. exciting light sources；2. capillary；3. fluid column；4. hopper；5. fiber optic bundle；6. collimated light path.
Specific embodiment
The present invention is made below with reference to specification and specific embodiment and further being elaborated, the embodiment is only used
In explaining the present invention, it is not intended to limit the scope of the present invention.Test method as used in the following examples is such as without special theory
It is bright, it is conventional method；Used material, reagent etc., unless otherwise specified, for the reagent and material commercially obtained
Material.
The technology of the present invention content part describes a kind of method using fluorescence intensity measurement temperature.Following instance is with Luo Dan
The alcoholic solution of bright base fluorescent dye is the fluorescent liquid material, test macro composition such as Fig. 1, mainly by exciting light sources
1, capillary 2, fluid column 3, hopper 4, fiber optic bundle 5, collimated light path 6.It is described in detail below: hydraulically full in hopper 4, reservoir
Vacuum glass capillary 2 is connected on slot 4, the liquid of thermal expansion enters capillary 2 and forms the fluid column 3 being partially filled with.Wherein hair
Tubule side is equipped with exciting light sources 1, the exciting light uniform irradiation capillary 2 that a wordline shape exciting light sources 1 issue.Capillary
Transmitted light, the fluorescence issued in transmitted light comprising part exciting light and fluid column 3 are collected with fiber optic bundle 5 in 2 other sides.Collimated light path 6
Transmitted light convergence is reconverted into directional light in the form of lens group, is then successively divided, filters by interferometric filter group, point
From fluorescence and exciting light respectively via photo-electric conversion element detected intensity, then export after scale operation, show.
Setting changes environment temperature locating for the solution, measurement and the known ring of record gradually in 0~40 DEG C of temperature range
The fluorescence intensity A of the solution, excitating light strength B at a temperature of border.
The ratio for calculating rhodamine alcoholic solution fluorescence intensity and excitating light strength, is fitted the intensity than the data with temperature
Relationship, corresponding relation function are the temperature sensing equation for demarcating this test macro.
Test macro is placed in unknown temperatures environment, measures its fluorescence and excitating light strength under the same testing conditions
Than substituting into the temperature sensing equation of calibration before to get temperature value to be measured is arrived.
The above embodiments are merely illustrative of the technical solutions of the present invention rather than limiting the scope of the invention.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (5)
1. a kind of fluorescence temp measuring method, it includes being based on fluorescent liquid material, and the glimmering of the fluid column of expansion is recorded under known temperature
Light light intensity, and compared with incident excitating light strength, fitting gained intensity obtains temperature sensing side than the rule varied with temperature
Journey will measure intensity than substituting into sensing equation, learn dut temperature under unknown temperatures；It is characterized in that method and step is as follows:
Step 1: fluorescent liquid material is filled hopper, enter connection hopper with the liquid that environment temperature is increased and expanded
Vacuum glass capillary formed fluid column；
Step 2: measuring and recording the fluorescent intensity of fluid column in capillary, the temperature sensing curve of the fluorescent material is demarcated；Tool
Steps are as follows for body；
Setting changes environment temperature locating for solution to step 2-1. gradually in certain temperature range；
Step 2-2. measures and records the fluorescence intensity of solution at each temperature described in step 2-1；
Step 2-3. calculates the fluorescence intensity of solution and the intensity ratio of incident intensity；
Step 2-4. is fitted to obtain intensity described in step 2-3 than the relation function with temperature；
Step 3: the fluorescent liquid material is placed in unknown temperatures environment, the fluorescence of fluid column is inspired, the fluorescence for recording it is strong
Degree and incident intensity substitute by the obtained relation function of step 2-4, obtain temperature value to be measured.
2. a kind of fluorescence temp measuring method according to claim 1, it is characterised in that: the height reflection temperature of the fluid column
Size.
3. a kind of fluorescence temp measuring method according to claim 1, it is characterised in that: when exciting light equably irradiates entire institute
The capillary stated, the fluid column go out fluorescence by uniform excitation, and the overall strength of fluorescence is proportional to liquid-column height.
4. a kind of fluorescence temp measuring method according to claim 1, it is characterised in that: the total fluorescence intensity of the fluid column and swash
It is linear dependence between the ratio and temperature of luminous intensity.
5. a kind of fluorescence temp measuring method according to claim 1, it is characterised in that: no matter liquid level have with temperature it is irrelevant,
The method can also be only used for the height of detection fluid column, that is, liquid level.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910626850.5A CN110186587B (en) | 2019-07-12 | 2019-07-12 | Fluorescence temperature measurement method |
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| CN201910626850.5A CN110186587B (en) | 2019-07-12 | 2019-07-12 | Fluorescence temperature measurement method |
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| CN110186587A true CN110186587A (en) | 2019-08-30 |
| CN110186587B CN110186587B (en) | 2021-02-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113379617A (en) * | 2021-04-29 | 2021-09-10 | 中国船舶重工集团公司第七一九研究所 | Post-processing method for fluid temperature field image in flow channel |
Citations (6)
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| SU1446493A1 (en) * | 1987-01-12 | 1988-12-23 | Уфимский авиационный институт им.Серго Орджоникидзе | Digital thermometer |
| CN1097249A (en) * | 1993-09-25 | 1995-01-11 | 王国璋 | Temperature detect switch (TDS) and special-purpose thermometer |
| CN1051636C (en) * | 1993-12-31 | 2000-04-19 | 王国璋 | Thermostatic device of temp. sensor thermometer |
| US20030048831A1 (en) * | 2000-03-09 | 2003-03-13 | Fabrice Lemoine | Optical device and method for the non-intrusive measuring of the temperature of a flowing liquid |
| CN101133307A (en) * | 2006-03-13 | 2008-02-27 | 陈东兵 | Over-temperature alarm display device |
| CN102410886A (en) * | 2011-08-30 | 2012-04-11 | 深圳大学 | Fiber temperature sensor and measuring system thereof and signal processing method of system |
-
2019
- 2019-07-12 CN CN201910626850.5A patent/CN110186587B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1446493A1 (en) * | 1987-01-12 | 1988-12-23 | Уфимский авиационный институт им.Серго Орджоникидзе | Digital thermometer |
| CN1097249A (en) * | 1993-09-25 | 1995-01-11 | 王国璋 | Temperature detect switch (TDS) and special-purpose thermometer |
| CN1051636C (en) * | 1993-12-31 | 2000-04-19 | 王国璋 | Thermostatic device of temp. sensor thermometer |
| US20030048831A1 (en) * | 2000-03-09 | 2003-03-13 | Fabrice Lemoine | Optical device and method for the non-intrusive measuring of the temperature of a flowing liquid |
| CN101133307A (en) * | 2006-03-13 | 2008-02-27 | 陈东兵 | Over-temperature alarm display device |
| CN102410886A (en) * | 2011-08-30 | 2012-04-11 | 深圳大学 | Fiber temperature sensor and measuring system thereof and signal processing method of system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113379617A (en) * | 2021-04-29 | 2021-09-10 | 中国船舶重工集团公司第七一九研究所 | Post-processing method for fluid temperature field image in flow channel |
| CN113379617B (en) * | 2021-04-29 | 2022-11-08 | 中国船舶重工集团公司第七一九研究所 | Post-processing method for fluid temperature field image in flow channel |
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