CN106568526B - Temperature measurement system and its test method and application based on YSZ:Re fluorescence lifetime measurement - Google Patents
Temperature measurement system and its test method and application based on YSZ:Re fluorescence lifetime measurement Download PDFInfo
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- CN106568526B CN106568526B CN201610910520.5A CN201610910520A CN106568526B CN 106568526 B CN106568526 B CN 106568526B CN 201610910520 A CN201610910520 A CN 201610910520A CN 106568526 B CN106568526 B CN 106568526B
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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Abstract
The present invention relates to temperature measurement systems and its test method and application based on YSZ:Re fluorescence lifetime measurement, temperature measurement system includes signal projector, the UV-LED ultraviolet source being electrically connected with signal projector, temperature measurement probe and the processes temperature signal unit being used cooperatively with temperature measurement probe, the processes temperature signal unit includes optical filtering, photomultiplier detector, the resistance box and oscillograph being sequentially connected electrically with photomultiplier detector, the surface of the temperature measurement probe is coated with YSZ:Re fluorescence coating, and by optical fiber respectively with UV-LED ultraviolet source, optical filtering is connected；The temperature measurement system be used for measure aero-engine or ground gas turbine it is in running order under temperature.Compared with prior art, the present invention has measurement temperature 500-1200 DEG C high, and the accurate high feature of temperature adapts to the temperature under varying environment according to the shape for changing temperature measurement probe and measures, do not influence temperature field, temperature accuracy is high, applied widely.
Description
Technical field
The invention belongs to inorganic optical material technical fields, are related to a kind of temperature survey based on YSZ:Re fluorescence lifetime measurement
Amount system and its test method and application.
Background technique
In the prior art, it is known that the method for measuring aero-engine, gas turbine and other high temperature application temperature,
Its measuring principle is based primarily upon temperature depending on resistance, pyroelectric effect (thermocouple), colour developing projection, the intracorporal velocity of sound of gas, scattering
Or the spatial distribution etc. of the electromagnetic heat radiation of transmitting.Temperature measurement for aero-engine, gas turbine must endure as pole
High temperature.In practical applications, traditional thermocouple is under such exacting terms, and the rapid aging of meeting, service life is significantly
Shorten.Radiation thermometer can separate the environment of measuring part and high temperature and pressure, but due to far measuring distance, measurement essence
Degree will receive intrinsic limitation.
With advanced aero engine, the development of ground gas turbine technology, efficient turbine rate is being pursued, before the long-life
It puts, aero-engine, gas turbine temperature are continuously improved, and engine temperature is whether just to characterize aeroengine operation status
The important parameter that one of normal most important parameter and pilot and maintenance personnel must grasp, so accurately and efficiently examining
Testing temperature is very significant.In aero-engine update, the research and development of high temperature test technology are played very heavy
The effect wanted.
In order to complete these tasks, it is necessary to propose high requirement to the accuracy and long-term reliability of temperature measurement.Mesh
Before, desired measurement accuracy is not achieved in available pyrometer.In addition, structure is complicated for existing pyrometer, volume is larger, makes
Used time must be difficult to apply in aero-engine and gas turbine equipped with strong cooling system.
YSZ:Re (lanthanide series rare-earth elements such as Re=Eu, Dy) is effective luminescent material, has good optical property, is surveyed
Amount temperature range is 500-1200 DEG C, has certain thermal conductivity.Studies have shown that the YSZ:Re coating layer thickness of spraying is thinner,
The temperature error measured is smaller.YSZ:Re has excellent corrosion resistance.The coating on alumina rod surface can be prevented partially
The infra-red radiation of engine interior enters fluorescence signal acquisition system, reduces the shadow that infra-red radiation measures fluorescence signal under high temperature
It rings.
The method of existing preparation YSZ:Re (lanthanide series rare-earth elements such as Re=Eu, Dy) fluoresent coating mainly has electron-beam
Physical vapor deposition (EB-PVD) and plasma spraying (APS).The adhesive layer structure of EB-PVD method preparation is uniform, comprehensive performance
Good, thickness control is accurate, but deposition efficiency is low, and equipment is expensive, and at high cost and sample size cannot be too big.Compared to EB-PVD
Method, APS method deposition efficiency is high, and preparation cost is low.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide kind of a measuring accuracy height, economical
Practicability is good, long service life, the stable temperature measurement system and its test side based on YSZ:Re fluorescence lifetime measurement of performance
Method and application, it is low to measurement temperature in aero-engine and the application progress temperature measurement of other high temperature etc. in the prior art to solve
Defect.
The purpose of the present invention can be achieved through the following technical solutions:
Based on the temperature measurement system of YSZ:Re fluorescence lifetime measurement, the temperature measurement system include signal projector, with
UV-LED ultraviolet source, temperature measurement probe and the temperature being used cooperatively with temperature measurement probe of signal projector electrical connection
Signal processing unit, the processes temperature signal unit include optical filtering, photomultiplier detector and photomultiplier detector
The resistance box and oscillograph being sequentially connected electrically, the surface of the temperature measurement probe is coated with YSZ:Re fluorescence coating, and passes through
Optical fiber is connected with UV-LED ultraviolet source, optical filtering respectively；
In the operating condition, signal projector control UV-LED ultraviolet source launches light-pulse generator, in pulse
Under the action of light source, the YSZ:Re fluorescence coating in temperature measurement probe issues fluorescence signal, which passes through optical filtering quilt
Photomultiplier detector receives, and fluorescence signal is converted into current signal and is sent to resistance box by photomultiplier detector,
Reconvert is shown on oscillograph at voltage signal, is obtained fluorescence decay spectrum, is converted into the fluorescence longevity using attenuation equation
Life, can be obtained temperature information further according to the standard curve of fluorescence lifetime and temperature relation.
The temperature measurement probe is the signle crystal alumina temperature measurement spy that surface plasma sprays YSZ:Re fluorescence coating
Needle.
The shape of the signle crystal alumina temperature measurement probe is cylindric or disc-shaped.
The signle crystal alumina temperature measurement probe can be made into other simple shapes such as rodlike of similar thermocouple,
In favor of reducing probe size, and increase receptor area.
The chemical formula of YSZ:Re is ZrO in the YSZ:Re fluorescence coating2+ 7wt%Y2O3+ (0.1-2mol%) Re2O3,
In, Re is lanthanide series rare-earth elements.
The Re preferred Eu or Dy.
The YSZ:Re fluorescence coating with a thickness of 5-50 μm.
The signle crystal alumina temperature measurement probe the preparation method comprises the following steps: signle crystal alumina is successively used first acetone,
Alcohol carries out oil processing, and blasting treatment is carried out on signle crystal alumina, obtains uniform surface roughness, then using etc. from
Sub- spraying method, by YSZ:Re powder spray on signle crystal alumina.
The partial size of the YSZ:Re powder is 40-100 μm, is prepared using reversed coprecipitation or collosol and gel liquid phase method
It forms.
When preparing YSZ:Re powder, raw material is selected to have zirconium source (Zr (NO3)4·xH2O, x=3) or ZrOCl2·
8H2O), Y2O3, Re2O3It (include Eu2O3,Dy2O3Equal lanthanide rare earth oxides), nitric acid and ammonium hydroxide.
The specific steps of the reversed coprecipitation are as follows:
First using nitric acid under heating conditions by Y2O3, Re2O3Powder dissolution, to Y2O3, Re2O3Powder is completely dissolved
Afterwards, heating temperature is improved to decompose extra nitric acid and volatilize completely, then by Zr (NO3)4·xH2O or ZrOCl2·8H2O
Y (NO is poured into deionized water3)3With Re (NO3)3Mixed solution in, magnetic agitation fills each ingredient in a liquid
Divide uniformly mixing, then mixed solution is poured slowly into dilute ammonia solution, it is dilute in order to guarantee each cation while precipitate
The pH value control of ammonium hydroxide is 9, and filtering will be precipitated completely afterwards for 24 hours by standing after precipitating, and clean 3-4 using deionization hydrate alcohol
Time, then drying for 24 hours, finally calcines at 950 DEG C and obtains fluorescent powder for 24 hours at 120 DEG C.
The specific steps of collosol and gel liquid phase method are as follows:
First using nitric acid under heating conditions by Y2O3, Re2O3Powder dissolution, to Y2O3, Re2O3Powder is completely dissolved
Afterwards, it improves heating temperature to decompose extra nitric acid and volatilize completely, a certain amount of chelating agent is then added in mixed solution
The molar ratio of the metal ion of citric acid, citric acid and chelating is 2:1, is configured to solution A；By Zr (NO3)4·xH2O or
ZrOCl2·8H2O is dissolved in deionized water, and dispersing agent polyethylene glycol (wherein, the additional amount of dispersing agent polyethylene glycol is added
Are as follows: the dispersing agent of 1g is added in the final fluorescent powder of every synthesis 5g), it is configured to B solution；Solution A is poured slowly into B solution
In, the colloidal sol of yellow transparent is then thermally formed in 80 DEG C of water-bath, colloidal sol is dry at 120 DEG C to obtain yellow gel, finally
It is calcined at 950 DEG C and equally obtains fluorescent powder for 24 hours；Obtain fluorescent powder.
The YSZ:Re powder of synthesis is granulated by craft or spray drying process, PVA binder is added, dry, sieving,
It is suitable for the powder for carrying out plasma spraying to obtain good fluidity.
The condition of the blasting treatment are as follows: blasting pressure 0.1-0.7MPa, shot blasting particles are that partial size is 16-120 mesh
Al2O3Particle；
The plasma spraying method are as follows: the temperature for controlling matrix is 200-600 DEG C, and the spacing of spray gun and matrix is
90-250mm, spray gun movement speed are 300-1000mm/s, and powder feed rate 10-70g/min, powder feeding air-flow is 0.5-1.2L/
Min, spray voltage 100-180V, spraying current 200-250A, argon gas flow velocity are 40-120L/min, hydrogen flow rate 15-
45L/min。
The test method of temperature measurement system based on YSZ:Re fluorescence lifetime measurement, this method specifically include following step
It is rapid:
(1) controlling UV-LED ultraviolet source to launch pulse width by signal projector is 1-5ms, and the pulse period is
The light-pulse generator of 10-1000ms；
(2) under the action of light-pulse generator, the YSZ:Re fluorescence coating in temperature measurement probe issues fluorescence signal, the fluorescence
Signal is received by optical filtering by photomultiplier detector；
(3) fluorescence signal is converted into current signal and is sent to resistance box by photomultiplier detector, and passes through resistance
Current signal is converted to voltage signal by case, and voltage signal is amplified, and is shown on oscillograph, and fluorescence decay spectrum is obtained；
(4) by utilizing attenuation equation to fluorescence decay spectrum, fluorescence lifetime is obtained；
(5) temperature information is obtained according to the standard curve of fluorescence lifetime and temperature relation.
The fluorescence lifetime curve obtained in step (5) as a preferred technical solution, is the superposition of 1-512 curve.
The application of temperature measurement system based on YSZ:Re fluorescence lifetime measurement, the system for measure aero-engine or
Temperature under ground gas turbine is in running order.
In the present invention, the alternative condition of the optical filtering are as follows: when Re be Eu when, using 570nm high pass optical filtering and
The low pass optical filtering of 625nm；When Re is Dy, using the high pass optical filtering of 550nm and the low pass optical filtering of 600nm.
The alternative condition of the UV-LED ultraviolet source wavelength are as follows: when Re is Eu, UV-LED ultraviolet source wavelength is
532,405 or 385nm；When Re is Dy, UV-LED ultraviolet source wavelength is 355,385 or 405nm.
The power of the UV-LED ultraviolet source is 0-10W.
The resistance adjustment range of the resistance box is 100-2000 Ω.
In actual use, surface is deposited with to the signle crystal alumina other end polishing connection optical fiber coupling of YSZ:Re fluorescence coating
Clutch simultaneously connects optical fiber, and optical fiber is sequentially connected UV-LED ultraviolet source and signal projector all the way, and another way optical fiber is sequentially connected
Optical filtering, photomultiplier detector (i.e. PMT detector), resistance box, oscillograph.Wherein, the signal projector of light source also with
Oscillograph is connected, the also available light signal spectral line from oscillograph.Signal projector makes the company of UV-LED ultraviolet source
Continuous light source becomes light-pulse generator, pulse width 1-5ms, pulse period 10-1000ms.
Temperature measurement probe is installed on to the position for needing to measure temperature, opens UV-LED ultraviolet source, adjusts light source function
Rate opens PMT detector, adjusts the resistance value of resistance box, changes oscillograph spectrum cumulative frequency 1-512 times, obtains smooth
Fluorescence decay curve is fitted attenuation curve using software, obtains fluorescence lifetime, compares the standard of YSZ:Re fluorescence lifetime and temperature
Curve obtains temperature value.
Compared with prior art, the invention has the characteristics that:
1) due to the signle crystal alumina temperature measurement probe using surface plasma spraying YSZ:Re fluorescence coating, temperature is measured
Range is wide, can be used for measuring 500-1200 DEG C of high temperature, and flexibility is good, can be according to the shape of change signle crystal alumina to adapt to not
With the temperature measurement under environment, to not influence temperature field, temperature accuracy is high, applied widely；
2) can be used in the very severe test environment such as engine turbine, combustion chamber, long service life, stability
Good, measurement is simple and efficient, can be used for real-time measurement aero-engine, the temperature of ground gas turbine, to detect aeroplane engine
The working condition of machine or ground gas turbine, it is economical and practical, it is convenient for industrialized production, has a good application prospect.
Detailed description of the invention
Fig. 1 is temperature measurement system structural schematic diagram of the present invention；
Fig. 2 is temperature measurement probe structural schematic diagram of the present invention；
Fig. 3 is that the back scattering of plasma spraying YSZ:Re fluorescence coating cross section scans micro- spectrogram；
Fig. 4 is YSZ:Re fluorescence lifetime canonical plotting under different temperatures；
Description of symbols in figure:
1-signal projector, 2-UV-LED ultraviolet sources, 3-temperature measurement probes, 4-optical filterings, 5-photomultiplier transits
Pipe detector, 6-resistance boxes, 7-oscillographs, 8-YSZ:Re fluorescence coatings, 9-optical fiber, 10-fiber couplers.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
As shown in Figs. 1-2, the temperature measurement system based on YSZ:Re fluorescence lifetime measurement, the temperature measurement system include letter
Number transmitter 1, the UV-LED ultraviolet source 2 being electrically connected with signal projector 1, temperature measurement probe 3 and measuring with temperature are visited
The processes temperature signal unit that needle 3 is used cooperatively, the processes temperature signal unit include optical filtering 4, photomultiplier detector
5, the resistance box 6 and oscillograph 7 being sequentially connected electrically with photomultiplier detector 5, the surface of temperature measurement probe 3 is coated with
YSZ:Re fluorescence coating 8, and be connected respectively with UV-LED ultraviolet source 2, optical filtering 4 by optical fiber 9；
Wherein, temperature measurement probe 3 is the signle crystal alumina temperature measurement spy that surface plasma sprays YSZ:Re fluorescence coating 8
Needle.The chemical formula of YSZ:Re is ZrO in YSZ:Re fluorescence coating 82+ 7wt%Y2O3+ (0.1-2mol%) Re2O3, wherein Re Eu.
YSZ:Re fluorescence coating 8 with a thickness of 5 μm.
In the present embodiment, the shape of signle crystal alumina temperature measurement probe is cylindric, signle crystal alumina temperature measurement spy
Needle the preparation method comprises the following steps: successively carry out oil processing with acetone, alcohol to signle crystal alumina first, then use partial size for 120
Purpose Al2O3Particle carries out blasting treatment to signle crystal alumina, obtains uniform surface roughness (range of roughness is 5 μm),
Then plasma spraying method is used, by YSZ:Re powder spray on signle crystal alumina.
Wherein, the condition of blasting treatment are as follows: blasting pressure 0.5MPa.
Plasma spraying method carries out heating fusing or semi-molten to ceramic particle by high-temperature plasma line, then
It is quickly sprayed into matrix surface and forms the coating with layer structure.It must be 4 times to substrate preheating before spraying.Design parameter
Are as follows: the temperature for controlling matrix is 200 DEG C, and the spacing of spray gun and matrix is 150mm, and spray gun movement speed is 300mm/s, powder feeding speed
Degree is 40g/min, and powder feeding air-flow is 0.8L/min, spray voltage 110V, spraying current 220A, and argon gas flow velocity is 60L/
Min, hydrogen flow rate 25L/min.
In the present embodiment, YSZ:Re powder diameter is 40 μm, is prepared using reversed coprecipitation.In preparation YSZ:Re
When powder, raw material is selected to have zirconium source (Zr (NO3)4·3H2O or ZrOCl2·8H2O), Y2O3, Eu2O3, nitric acid and ammonium hydroxide.
The specific steps of reversed coprecipitation are as follows:
First using nitric acid under heating conditions by Y2O3, Re2O3Powder dissolution, to Y2O3, Re2O3Powder is completely dissolved
Afterwards, heating temperature is improved to decompose extra nitric acid and volatilize completely, then by Zr (NO3)4·3H2O or ZrOCl2·8H2O
Y (NO is poured into deionized water3)3With Re (NO3)3Mixed solution in, magnetic agitation fills each ingredient in a liquid
Divide uniformly mixing, then mixed solution is poured slowly into dilute ammonia solution, it is dilute in order to guarantee each cation while precipitate
The pH value control of ammonium hydroxide is 9, and filtering will be precipitated completely afterwards for 24 hours by standing after precipitating, and clean 3-4 using deionization hydrate alcohol
Time, then drying for 24 hours, finally calcines at 950 DEG C and obtains fluorescent powder for 24 hours at 120 DEG C.
The YSZ:Re powder of synthesis is granulated by craft or spray drying process, PVA binder is added, dry, sieving,
It is suitable for the powder for carrying out plasma spraying to obtain good fluidity.
In the present embodiment, optical filtering 4 selects the high pass optical filtering of 570nm and the low pass optical filtering of 625nm.UV-LED is ultraviolet
The wavelength of light source 2 is 405nm, light source power 8w.The resistance of resistance box 6 is set as 2000 Ω.
In actual use, surface is deposited with to the signle crystal alumina other end polishing connection optical fiber of YSZ:Re fluorescence coating 8
Coupler 10 simultaneously connects optical fiber 9, and optical fiber 9 is sequentially connected UV-LED ultraviolet source 2 and signal projector 1, another way optical fiber 9 all the way
It is sequentially connected the high pass optical filtering of 570nm, the low pass optical filtering of 625nm, photomultiplier detector 5 (i.e. PMT detector), electricity
Hinder case 6, oscillograph 7.Wherein, the signal projector 1 of light source is also connected with oscillograph 7, the also available light source from oscillograph 7
Signal spectrum.Signal projector 1 makes the continuous light source of UV-LED ultraviolet source 2 become light-pulse generator.
In the operating condition, signal projector 1 controls UV-LED ultraviolet source 2 and launches the present embodiment temperature measurement system
Light-pulse generator, under the action of light-pulse generator, the YSZ:Re fluorescence coating 8 in temperature measurement probe 3 issues fluorescence signal, the fluorescence
Signal is received by optical filtering 4 by photomultiplier detector 5, and fluorescence signal is converted into electric current by photomultiplier detector 5
Signal is simultaneously sent to resistance box 6, and reconvert is shown on oscillograph 7 at voltage signal, obtains fluorescence decay spectrum, utilizes
Attenuation equation is converted into fluorescence lifetime, can be obtained temperature information further according to the standard curve of fluorescence lifetime and temperature relation.
The test method of temperature measurement system based on YSZ:Re fluorescence lifetime measurement, this method specifically include following step
It is rapid:
(1) controlling UV-LED ultraviolet source 2 to launch pulse width by signal projector 1 is 2ms, and the pulse period is
The light-pulse generator of 100ms；
(2) under the action of light-pulse generator, the YSZ:Re fluorescence coating 8 in temperature measurement probe 3 issues fluorescence signal, this is glimmering
Optical signal is received by optical filtering 4 by photomultiplier detector 5；
(3) fluorescence signal is converted into current signal and is sent to resistance box 6 by photomultiplier detector 5, and passes through electricity
Current signal is converted to voltage signal by resistance case 6, and voltage signal is amplified, is shown on oscillograph 7, obtains fluorescence decay light
Spectrum；
(4) by utilizing attenuation equation to fluorescence decay spectrum, fluorescence lifetime is obtained；
(5) temperature information is obtained according to the standard curve of fluorescence lifetime and temperature relation.
The fluorescence lifetime curve obtained in step (5) is the superposition of 1-512 curve.
The present embodiment temperature measurement system can be used for measuring aero-engine or ground gas turbine it is in running order under
Temperature.
Embodiment 2
First with reversed coprecipitation method preparation YSZ:Dy powder (partial size is 60 μm), then signle crystal alumina is carried out
Cleaning, blasting treatment.10 μm of YSZ:Dy fluorescence coating 8 is prepared by plasma spraying technology.Spray parameters: spraying current is
400A, voltage 150V, Ar flow are 45L/min, H2Flow is 45L/min, and spray gun and matrix distance are 150mm, powder sending quantity
For 5g/min.The signle crystal alumina for spraying upper YSZ:Dy fluorescence coating 8 is connected into optical fiber 9, and is divided into two outputs.One and wavelength
It is connected for UV-LED ultraviolet source 2, the signal projector 1 of 355nm, signal projector 1 makes continuous light source become light-pulse generator, arteries and veins
Rushing width is 1ms, pulse period 100ms.Low pass optical filtering, the resistance box of one connection 550nm high pass optical filtering, 600nm
6, oscillograph 7, and signal projector 1 is connected into the channel of oscillograph 7.Resistance box 6 is set as 2000 Ω, 7 cumulative frequency of oscillograph
512 times.Light source power is 10w.
In the present embodiment, optical filtering 4 is the high pass optical filtering of 550nm and the low pass optical filtering of 600nm, UV-LED ultraviolet light
The wavelength in source 2 is 405nm.Remaining is the same as embodiment 1.
Fig. 3 is that the back scattering of 8 cross section of the present embodiment plasma spraying YSZ:Dy fluorescence coating scans micro- spectrogram.
Embodiment 3
First with collosol and gel liquid phase method preparation YSZ:Eu powder (partial size is 80 μm), then signle crystal alumina is carried out
Cleaning, blasting treatment.10 μm of YSZ:Eu fluorescence coating 8 is prepared by plasma spraying technology.Spray parameters: spraying current is
400A, voltage 150V, Ar flow are 60L/min, H2Flow is 20L/min, and spray gun and matrix distance are 150mm, powder sending quantity
For 5g/min.The signle crystal alumina for spraying upper YSZ:Eu fluorescence coating 8 is connected into optical fiber 9, and is divided into two outputs.One and wavelength
It is connected for UV-LED ultraviolet source 2, the signal projector 1 of 385nm, signal projector 1 makes continuous light source become light-pulse generator, arteries and veins
Rushing width is 1ms, pulse period 100ms.Low pass optical filtering, the resistance box of one connection 570nm high pass optical filtering, 625nm
6, oscillograph 7, and signal projector 1 is connected into the channel of oscillograph 7.Resistance box 6 is set as 1000 Ω, 7 cumulative frequency of oscillograph
512 times.Light source power is 10w.
The present embodiment prepares the specific steps of YSZ:Eu powder using collosol and gel liquid phase method are as follows:
First using nitric acid under heating conditions by Y2O3, Eu2O3Powder dissolution, to Y2O3, Eu2O3Powder is completely dissolved
Afterwards, it improves heating temperature to decompose extra nitric acid and volatilize completely, a certain amount of chelating agent is then added in mixed solution
The molar ratio of the metal ion of citric acid, citric acid and chelating is 2:1, is configured to solution A；By Zr (NO3)4·3H2O or
ZrOCl2·8H2O is dissolved in deionized water, and dispersing agent polyethylene glycol (wherein, the additional amount of dispersing agent polyethylene glycol is added
For the final fluorescent powder of every synthesis 5g, the dispersing agent of 1g is added), it is configured to B solution；Solution A is poured slowly into B solution
In, the colloidal sol of yellow transparent is then thermally formed in 80 DEG C of water-bath, colloidal sol is dry at 120 DEG C to obtain yellow gel, finally
It is calcined at 950 DEG C and equally obtains fluorescent powder for 24 hours；Obtain fluorescent powder.
The YSZ:Eu powder of synthesis is granulated by craft or spray drying process, PVA binder is added, dry, sieving,
It is suitable for the powder for carrying out plasma spraying to obtain good fluidity.
In the present embodiment, the wavelength of UV-LED ultraviolet source 2 is 385nm.Remaining is the same as embodiment 1.
Fig. 4 is embodiment 2, YSZ:Dy powder, the fluorescence lifetime of YSZ:Eu powder at different temperatures made from embodiment 3
Canonical plotting.Fluorescence lifetime thermometric has measurement temperature high, fast response time, and using simple, application environment is changeable, high temperature
The features such as spending measurement accuracy.
Embodiment 4
In the present embodiment, temperature measurement probe 3 is the signle crystal alumina temperature that surface plasma sprays YSZ:Re fluorescence coating 8
Measure probe.YSZ:Re fluorescence coating 8 with a thickness of 50 μm.Re is Eu.
In the present embodiment, the shape of signle crystal alumina temperature measurement probe is disc-shaped, and the measurement of signle crystal alumina temperature is visited
Needle the preparation method comprises the following steps: successively carry out oil processing with acetone, alcohol to signle crystal alumina first, then use partial size for 16 mesh
Al2O3Particle carries out blasting treatment to signle crystal alumina, obtains uniform surface roughness (range of roughness is 15 μm),
Then plasma spraying method is used, YSZ:Re powder (partial size is 100 μm) is sprayed on signle crystal alumina.
Wherein, the condition of blasting treatment are as follows: blasting pressure 0.7MPa.
Plasma spraying method carries out heating fusing or semi-molten to ceramic particle by high-temperature plasma line, then
It is quickly sprayed into matrix surface and forms the coating with layer structure.It must be 2 times to substrate preheating before spraying.Design parameter
Are as follows: the temperature for controlling matrix is 600 DEG C, and the spacing of spray gun and matrix is 250mm, and spray gun movement speed is 1000mm/s, powder feeding
Speed is 70g/min, and powder feeding air-flow is 1.2L/min, spray voltage 180V, spraying current 250A, and argon gas flow velocity is
120L/min, hydrogen flow rate 45L/min.
In the present embodiment, the wavelength of UV-LED ultraviolet source 2 is 532nm, light source power 10w.The resistance of resistance box 6 is set
For 100 Ω.
Remaining is the same as embodiment 1.
Embodiment 5
In the present embodiment, temperature measurement probe 3 is the signle crystal alumina temperature that surface plasma sprays YSZ:Re fluorescence coating 8
Measure probe.YSZ:Re fluorescence coating 8 with a thickness of 40 μm.Re is Dy.
In the present embodiment, the shape of signle crystal alumina temperature measurement probe is rodlike, the signle crystal alumina of similar thermocouple
Temperature measurement probe the preparation method comprises the following steps: successively carry out oil processing with acetone, alcohol to signle crystal alumina first, then use
Partial size is the Al of 80 mesh2O3Particle carries out blasting treatment to signle crystal alumina, obtains the uniform surface roughness (model of roughness
Enclose is 1 μm), plasma spraying method is then used, YSZ:Re powder (partial size is 50 μm) is sprayed on signle crystal alumina i.e.
It can.
Wherein, the condition of blasting treatment are as follows: blasting pressure 0.1MPa.
Plasma spraying method carries out heating fusing or semi-molten to ceramic particle by high-temperature plasma line, then
It is quickly sprayed into matrix surface and forms the coating with layer structure.It must be 3 times to substrate preheating before spraying.Design parameter
Are as follows: the temperature for controlling matrix is 320 DEG C, and the spacing of spray gun and matrix is 90mm, and spray gun movement speed is 300mm/s, powder feeding speed
Degree is 10g/min, and powder feeding air-flow is 0.5L/min, spray voltage 100V, spraying current 200A, and argon gas flow velocity is 40L/
Min, hydrogen flow rate 15L/min.
In the present embodiment, the wavelength of UV-LED ultraviolet source 2 is 385nm, light source power 2w.The resistance of resistance box 6 is set
For 800 Ω.
Remaining is the same as embodiment 1.
Embodiment 6:
The present embodiment is substantially the same manner as Example 5, the difference is that, the wavelength of UV-LED ultraviolet source 2 is 355nm,
Light source power is 4w.The resistance of resistance box 6 is set as 300 Ω.
The above description of the embodiments is intended to facilitate ordinary skill in the art to understand and use the invention.
Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein general
Principle is applied in other embodiments without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments, ability
Field technique personnel announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be of the invention
Within protection scope.
Claims (7)
1. the temperature measurement system based on YSZ:Re fluorescence lifetime measurement, which is characterized in that the temperature measurement system includes signal
Transmitter, the UV-LED ultraviolet source being electrically connected with signal projector, temperature measurement probe and with temperature measurement probe cooperate
The processes temperature signal unit used, the processes temperature signal unit include optical filtering, photomultiplier detector and photoelectricity times
Increase resistance box and oscillograph that pipe detector is sequentially connected electrically, the surface of the temperature measurement probe is coated with YSZ:Re fluorescence
Layer, and be connected respectively with UV-LED ultraviolet source, optical filtering by optical fiber；
The optical filtering includes the high pass optical filtering of 570nm and the low pass optical filtering of 625nm；
In the operating condition, signal projector control UV-LED ultraviolet source launches light-pulse generator, in light-pulse generator
Under the action of, the YSZ:Re fluorescence coating in temperature measurement probe issues fluorescence signal, and the fluorescence signal is by optical filtering by photoelectricity
Multiplier detectors receive, and fluorescence signal is converted into current signal and is sent to resistance box by photomultiplier detector, then is turned
It changes voltage signal into, and is shown on oscillograph, obtain fluorescence decay spectrum, be converted into fluorescence lifetime using attenuation equation, then
It can be obtained temperature information according to the standard curve of fluorescence lifetime and temperature relation；
The temperature measurement probe is the signle crystal alumina temperature measurement probe that surface plasma sprays YSZ:Re fluorescence coating；
The YSZ:Re fluorescence coating with a thickness of 5-50 μm；
The plasma spraying method are as follows: the temperature for controlling matrix is 200-600 DEG C, and the spacing of spray gun and matrix is 90-
250mm, spray gun movement speed are 300-1000mm/s, and powder feed rate 10-70g/min, powder feeding air-flow is 0.5-1.2L/min,
Spray voltage is 100-180V, and spraying current 200-250A, argon gas flow velocity is 40-120L/min, hydrogen flow rate 15-45L/
min；
The signle crystal alumina temperature measurement probe the preparation method comprises the following steps: carry out blasting treatment first on signle crystal alumina,
Roughness is obtained, plasma spraying method is then used, by YSZ:Re powder spray on signle crystal alumina.
2. the temperature measurement system according to claim 1 based on YSZ:Re fluorescence lifetime measurement, which is characterized in that described
Signle crystal alumina temperature measurement probe shape be cylindric or disc-shaped.
3. the temperature measurement system according to claim 1 based on YSZ:Re fluorescence lifetime measurement, which is characterized in that described
YSZ:Re fluorescence coating in YSZ:Re chemical formula be ZrO2+ 7wt%Y2O3+ (0.1-2mol%) Re2O3, wherein Re is group of the lanthanides
Rare earth element.
4. the temperature measurement system according to claim 1 based on YSZ:Re fluorescence lifetime measurement, which is characterized in that described
YSZ:Re powder partial size be 40-100 μm, prepared using reversed coprecipitation or collosol and gel liquid phase method.
5. the temperature measurement system according to claim 1 based on YSZ:Re fluorescence lifetime measurement, which is characterized in that described
Blasting treatment condition are as follows: blasting pressure 0.1-0.7MPa, shot blasting particles are the Al that partial size is 16-120 mesh2O3Particle.
6. the test method of the temperature measurement system as described in claim 1 based on YSZ:Re fluorescence lifetime measurement, feature
Be, this method specifically includes the following steps:
(1) controlling UV-LED ultraviolet source to launch pulse width by signal projector is 1-5ms, pulse period 10-
The light-pulse generator of 1000ms；
(2) under the action of light-pulse generator, the YSZ:Re fluorescence coating in temperature measurement probe issues fluorescence signal, the fluorescence signal
It is received by optical filtering by photomultiplier detector；
(3) fluorescence signal is converted into current signal and is sent to resistance box by photomultiplier detector, and will by resistance box
Current signal is converted to voltage signal, and voltage signal is amplified, and is shown on oscillograph, obtains fluorescence decay spectrum；
(4) by utilizing attenuation equation to fluorescence decay spectrum, fluorescence lifetime is obtained；
(5) temperature information is obtained according to the standard curve of fluorescence lifetime and temperature relation.
7. the application of the temperature measurement system as described in claim 1 based on YSZ:Re fluorescence lifetime measurement, which is characterized in that
The system be used for measure aero-engine or ground gas turbine it is in running order under temperature.
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