CN107655589B - A kind of temperature, pressure combined measurement system and measurement method - Google Patents
A kind of temperature, pressure combined measurement system and measurement method Download PDFInfo
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Classifications
-
- 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
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Luminescent Compositions (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The present invention relates to temperature, pressure combined measurement system and measurement methods, the system includes that temperature, pressure probe, the fiber coupler connecting with temperature, pressure probe, the laser light source being connect by optical fiber with fiber coupler import, the spectroscope connected by optical fiber and fiber coupler outlet and the signal processing unit that spectroscope different light paths rear is arranged in, the surface of the temperature, pressure probe coat Zr3Y4O12: Eu mixes phosphorescent layer, the Zr with MFG3Y4O12: Eu mixes Zr in phosphorescent layer with MFG3Y4O12: the mass ratio of Eu and MFG is (800~2500): 1.Compared with prior art, the present invention has can be with non-contact method combined measurement temperature field and pressure field, it is high (500-1000 DEG C) to measure temperature, temperature and the high feature of pressure measurement accuracy, the temperature, pressure measurement under varying environment is adapted to according to the shape for changing temperature, pressure measurement probe, do not influence temperature field and pressure field, it is applied widely, suitable for measure aero-engine or ground gas turbine it is in running order under temperature.
Description
Technical field
The present invention relates to inorganic optical material technical fields, and in particular to a kind of temperature, pressure combined measurement system and measurement
Method.
Background technique
With the emergence and development of the industrial equipments such as gas turbine, aero-engine, modern engineering technology and scientific application
In measurement for temperature, pressure in high temperature and high pressure environment, it appears it is increasingly important.But these maximum conditions of high temperature and pressure have exceeded
The measurement range of traditional measurement method, it is necessary to carry out the research based on the new technologies such as novel distinct temperature and pressure sensor.
In existing temperature test technology, generally it is based primarily upon temperature and is put depending on resistance, pyroelectric effect (thermocouple), colour developing
It reflects, the intracorporal velocity of sound of gas, the spatial distribution of electromagnetic heat radiation of scattering or transmitting etc..In practical application, generally there are thermocouple, spoke
Penetrate the methods of thermometer.However, traditional thermocouple is under the harsh environment of high temperature and pressure, due to being the measurement using contact
Method, the rapid aging of meeting, service life greatly shorten.Radiation thermometer can by measuring part and the environment of high temperature and pressure every
It opens, but it is highly prone to measurement environment and measures the influence of body surface grey-body radiation emission ratio, measurement is highly prone to do
It disturbs.For existing pressure measurement, aperture usually is carried out in target surface, uses the method for mechanical pressure sensors.The party
Method destroys surface texture, not only breaks up test target pressure field structure, and for the gas turbine in high-speed motion, aviation
The working environments such as engine, installation are also highly prone to limit.
With the development of advanced aero engine, gas turbine technology, efficient turbine rate, the premise of long-life are being pursued
Under, aero-engine, gas turbine temperature and pressure are continuously improved.Temperature and pressure is accurately and efficiently measured, is extremely to have
Meaning.In the update of aero-engine and gas turbine, the research and development of high temperature and pressure measuring technology are played very
Important role.At present to the requirement of temperature and pressure sensor, mainly: broad quantum, precision are high, dynamic response is good, small-sized
Change, non-contact, anti-adverse environment ability is strong etc..
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of broad quantums, precision
Temperature, pressure combined measurement system and measurement method high, dynamic response is good.
The purpose of the present invention can be achieved through the following technical solutions: a kind of temperature, pressure combined measurement system, the survey
Amount system include temperature, pressure probe, the fiber coupler being connect with temperature, pressure probe, by optical fiber and fiber coupler into
The laser light source of mouth connection, the spectroscope connected by optical fiber and fiber coupler outlet and setting are in spectroscope different light paths
The surface of the signal processing unit at rear, the temperature, pressure probe coats Zr3Y4O12: Eu mixes phosphorescent layer with MFG, described
Zr3Y4O12: Eu mixes Zr in phosphorescent layer with MFG3Y4O12: the mass ratio of Eu and MFG is (800~2500): 1.
The system be used for measure aero-engine or ground gas turbine it is in running order under temperature and pressure.In work
Make under state, laser light source launches light-pulse generator, and under the action of light-pulse generator, temperature, pressure is measured on probe
Zr3Y4O12: Eu mixes phosphorescent layer with MFG and issues phosphorescent signal, which includes temperature information and pressure information, the mixing phosphorescence
Signal is divided into two ways of optical signals by spectroscope, and each signal processing unit of this two ways of optical signals receives and processes, and obtains phosphorescence
Attenuation curve is converted into phosphorescent lifetime using attenuation equation.According to the calibration curve of temperature phosphorescent lifetime and temperature relation
Obtain temperature information；According to the calibration curve of pressure phosphorescent lifetime and pressure dependence, the amendment of combination temperature information can get pressure
Force information.
Zr3Y4O12: Eu and MFG is effective luminescent material, has good optical property, wherein for Zr3Y4O12:
Eu, optical characteristics have certain connection to temperature and pressure.Its temperature measurement range can achieve 300~1000 DEG C at present,
The a wide range of covering from negative pressure to positive pressure also may be implemented in response for pressure.And for MFG, optical property is then only right
Temperature is sensitive, does not have any response to pressure change, temperature-measuring range can be arrived to -273~800 DEG C.According to the light of two kinds of materials
Characteristic is learned, the temperature and pressure information of its local environment can be very easily obtained.And it can when due to two kinds of material preparations
Particle of the diameter less than 5 microns is made, measurement spatial resolution will be very high.
According to its principle of luminosity of two kinds of materials, both materials are combined, temperature information is obtained using MFG, uses
Zr3Y4O12: Eu obtains temperature and pressure related information, and further uses the temperature information of MFG acquisition to Zr3Y4O12: Eu is obtained
Pressure and temp information be modified, obtain pressure information, be prepared into a kind of temperature, pressure combined measurement probe, be very feasible
's.And the temperature, pressure combined measurement probe has, and broad quantum, precision are high, dynamic response is good, minimize, is non-contact, anti-evil
The advantages that bad environment capacity is strong.
The Zr3Y4O12: it include ZrO in Eu2、Y2O3And Eu2O3, wherein Y2O3Molar fraction be 35%~45%,
Eu2O3Molar fraction be 0.1%~2%, the chemical formula of the MFG is 3.5MgO0.5MgF2·GeO2:Mn。
The Zr3Y4O12: the partial size of Eu is 40~100 μm, and the partial size of MFG is 5~15 μm.
The Zr3Y4O12: Eu mixes phosphorescent layer with MFG and is coated in temperature, pressure probe table by the method for plasma spraying
Face, the Zr3Y4O12: Eu mixed with MFG phosphorescent layer with a thickness of 5~50 μm, since phosphorescent layer is coated using plasma spray
Standby, in spraying process, particle melts at high temperature under high pressure, target surface is sprayed to molten condition, so the phosphorus of preparation
Photosphere thickness can achieve 5~50um.Zr3Y4O12: Eu is wet mixing with MFG mixing phosphor powder mixed method, and dry.Specifically
Are as follows: x parts of Zr are weighed by mixed proportion x3Y4O12: Eu and 1 part of MFG.Weighed MFG is put into isopropanol, the weight of isopropanol and MFG
Amount is than being 1000:1. by weighed Zr3Y4O12: Eu is put into suspension made of MFG and isopropanol, is stirred, whipping process
Until isopropanol all volatilization.The Zr that will be mixed3Y4O12: Eu is dried with MFG mixing phosphor powder, drying temperature
250 DEG C, time 2 h.By the Zr of synthesis3Y4O12: Eu is granulated with MFG mixing phosphor powder by craft or spray drying process,
PVA binder is added, dry, sieving, is suitable for the powder for carrying out plasma spraying to obtain good fluidity.
The temperature, pressure probe is cylindrical or disc-shaped, the material of the temperature, pressure probe are signle crystal alumina,
The other simple shapes such as rodlike that can be made into similar thermocouple, in favor of reducing probe size, and increase receptor area.
The spectroscope is in isosceles triangle, and spectroscopical bottom edge connect with optical fiber, two through being divided optical path respectively from
It is projected in a spectroscopical waist, the signal processing unit includes that processes temperature signal subelement and pressure signal processing are single
Member；
The processes temperature signal subelement include the temperature reflecting mirror being arranged in an optical path, temperature phosphorescence filter,
Temperature photomultiplier tube, temperature and resistance case and oscillograph；
The pressure signal processing subelement includes the baroreflex mirror being arranged in another optical path, the filter of pressure phosphorescence
Mirror, temperature photomultiplier tube, piezoresistive case and oscillograph.
The measuring system includes a signal projector, and the signal projector is connect with laser light source.
The alternative condition of optical filtering are as follows: for temperature phosphorescent signal, using the bandpass filter mirror of 620~670nm；For pressure
Power phosphorescent signal (Zr3Y4O12: Eu signal), using the bandpass filter mirror of 550~600nm.
The alternative condition of laser source wavelength are as follows: 380~410nm.
The power of laser light source is 0~15W.
The resistance adjustment range of resistance box is 100~1000 Ω.
In actual use, surface is deposited with Zr3Y4O12: Eu and the signle crystal alumina other end of MFG phosphorescent layer polish
Connection fiber coupler simultaneously connects optical fiber, and optical fiber is sequentially connected laser light source and signal projector all the way, and another way optical fiber is successively
Connect spectroscope, optical filtering, photomultiplier detector (i.e. PMT detector), resistance box, oscillograph.Wherein, the signal of light source
Transmitter is also connected with oscillograph, the also available light signal spectral line from oscillograph.Signal projector makes laser light source
Continuous light source become light-pulse generator, pulse width is 1~5ms, and the pulse period is 10~1000ms.
A method of temperature, pressure combined measurement is carried out using measuring system as described above, including the following steps:
(1) blasting treatment is carried out in temperature, pressure detecting probe surface, then by Zr by the way of plasma spraying3Y4O12:
Eu mixes phosphorescent layer with MFG coated in temperature, pressure detecting probe surface；
(2) each component is assembled in order, forms measuring system；
(3) control laser light source projects light-pulse generator, and temperature phosphor-decay curve and pressure phosphorescence are obtained in oscillograph
Attenuation curve, then temperature phosphor-decay curve utilizes attenuation equation using attenuation equation and pressure phosphor-decay curve, obtains
Temperature phosphorescent lifetime and pressure phosphorescent lifetime, to obtain temperature information and pressure information.
The pressure of the sandblasting is 0.1~0.7MPa, and shot blasting particles are the Al that partial size is 16~120 mesh2O3Particle；
The temperature of the plasma spraying control matrix is 200~600 DEG C, and the spacing of spray gun and matrix is 90~250mm,
Spray gun movement speed is 300~1000mm/s, and powder feed rate is 10~70g/min, and powder feeding air-flow is 0.5~1.2L/min, spray
Painting voltage be 100~180V, spraying current be 200~250A, argon gas flow velocity be 40~120L/min, hydrogen flow rate be 15~
45L/min。
The width of the light-pulse generator is 1~5ms, and the pulse period is 10~1000ms.
The concrete principle of the method for the present invention is as follows:
(1) controlling laser light 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, temperature, pressure measures the Zr on probe3Y4O12: Eu mixes phosphorescent layer hair with MFG
Phosphorescent signal out, the phosphorescent signal are divided into two ways of optical signals by spectroscope
(3) this two ways of optical signals is filtered by optical filtering, and temperature and pressure phosphorescent signal are filtered off respectively
(4) temperature is respectively received by photomultiplier detector with pressure phosphorescent signal.
(5) temperature phosphorescent signal is converted into current signal and is sent to resistance box by photomultiplier detector, and is passed through
Current signal is converted to voltage signal by resistance box, and voltage signal is amplified, and is shown on oscillograph, and temperature phosphor-decay is obtained
Curve；
(6) by utilizing attenuation equation to temperature phosphor-decay curve, temperature phosphorescent lifetime is obtained；
(7) temperature information is obtained according to the calibration curve of temperature phosphorescent lifetime and temperature relation.
(8) pressure phosphorescent signal is converted into current signal and is sent to resistance box by photomultiplier detector, and is passed through
Current signal is converted to voltage signal by resistance box, and voltage signal is amplified, and is shown on oscillograph, and pressure phosphor-decay is obtained
Curve；
(9) by utilizing attenuation equation to pressure phosphor-decay curve, pressure phosphorescent lifetime is obtained；
(10) according to the calibration curve of pressure phosphorescent lifetime and pressure dependence, the amendment of combination temperature information can get pressure
Force information.Wherein document M.D.Chambers, Clarke D R.Doped Oxides for High- can be used in attenuation equation
Temperature Luminescence and Lifetime Thermometry[J].Annual Review of
Materials Research, 1915,39 (1): 325-359 and document Allison S W, Gillies G T.Remote
thermometry with thermographic phosphors:Instrumentation and applications[J]
.Review of Scientific Instruments, 1997,68 (7): attenuation equation used in 2615-26.
Temperature, pressure measurement probe is installed on to the position for needing to measure temperature, pressure, laser light source is opened, adjusts light source
Power opens PMT detector, adjusts the resistance value of resistance box.Optical path is adjusted by adjusting spectroscope and reflecting mirror, enables PMT
Effectively receive signal, change oscillograph spectrum cumulative frequency 1-512 times, obtain two smooth phosphor-decay curves, use is soft
Part is fitted attenuation curve, obtains temperature phosphorescent lifetime (MFG signal) and temperature, pressure phosphorescent lifetime (Zr3Y4O12: Eu signal), it is right
Temperature value is obtained according to the calibration curve of MFG phosphorescent lifetime and temperature.Compare Zr3Y4O12: the mark of Eu phosphorescent lifetime and temperature, pressure
Determine curve, with reference to the temperature value that MFG is measured, obtains pressure value.
Compared with prior art, the beneficial effects of the present invention are embodied in following several respects:
(1) due to spraying Zr using surface plasma3Y4O12: Eu and the signle crystal alumina temperature, pressure of MFG phosphorescent layer join
Measurement probe is closed, temperature is measured and pressure limit is wide, can be used for measuring -273-1000 DEG C of high temperature, and -100kpa~2Mpa
Pressure.For resolution ratio up to μm rank, flexibility is good, can be according to the shape of change signle crystal alumina to adapt to the temperature under varying environment
Degree and pressure measurement, to not influence temperature field and pressure field, precision is high, applied widely；
(2) it can be used in the very severe test environment such as engine turbine, combustion chamber, long service life, stablize
Property it is good, measure it is simple and efficient, can be used for real-time measurement aero-engine, the temperature of ground gas turbine and pressure information, thus
The working condition of aero-engine or ground gas turbine is detected, it is economical and practical, it is convenient for industrialized production, there is application well
Prospect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of temperature, pressure combined measurement system of the present invention；
Fig. 2 a is temperature phosphor-decay curve in embodiment 1；
Fig. 2 b is the calibration curve of temperature phosphorescent lifetime and temperature relation in embodiment 1；
Fig. 3 a is pressure phosphor-decay curve in embodiment 1；
Fig. 3 b is the calibration curve of pressure phosphorescent lifetime and pressure dependence in embodiment 1.
Wherein, 1 is signal projector, and 2 be laser light source, and 3 be optical fiber, and 4 be temperature, pressure probe, and 5 be fiber coupler,
6 be Zr3Y4O12: Eu mixes phosphorescent layer with MFG, and 7 be spectroscope, and 8 be reflecting mirror, and 9 be temperature phosphorescence filter, and 10 be pressure phosphorescence
Filter, 11 be temperature photomultiplier tube, and 12 be pressure photoelectric multiplier tube, and 13 be temperature and resistance case, and 14 be piezoresistive case, and 15 are
Oscillograph.
Specific embodiment
It elaborates below to the embodiment of the present invention, the present embodiment carries out under the premise of the technical scheme of the present invention
Implement, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to following implementation
Example.
Embodiment 1
A kind of temperature, pressure combined measurement system, structure is as shown in Figure 1, include signal projector 1 and signal projector
Laser light source 2, temperature, pressure probe 4 and the temperature, pressure signal processing being used cooperatively with temperature, pressure probe 4 of 1 electrical connection
Unit, the processes temperature signal unit include spectroscope 7, reflecting mirror 8, temperature phosphorescence filter 9, pressure phosphorescence filter 10, temperature
Photomultiplier tube 11, the temperature and resistance case 13 being connect with temperature photomultiplier tube 11, pressure photoelectric multiplier tube 12 and pressure photoelectric
The piezoresistive case 14 that multiplier tube 12 connects and the oscillograph 15 for acquiring signal.The surface of temperature, pressure probe 4 is coated with
Zr3Y4O12: Eu mixes phosphorescent layer 6 with MFG, and is connected respectively with laser light source 2, spectroscope 7 by optical fiber 3；Fiber coupler 5
Integrated link optical fiber 3 and temperature, pressure probe 4.
Wherein, temperature, pressure probe 4 is that surface plasma sprays Zr3Y4O12: Eu mixes the monocrystalline oxygen of phosphorescent layer 6 with MFG
Change aluminium temperature, pressure combined measurement probe.Zr3Y4O12: Eu mixes Zr in phosphorescent layer 6 with MFG3Y4O12: the chemical formula of Eu is ZrO2+
45wt%Y2O3+ (0.1-2mol%) Eu2O3, the chemical formula of MFG is 3.5MgO0.5MgF2·GeO2: Mn, Zr3Y4O12: Eu with
MFG mix phosphorescent layer 6 with a thickness of 5 μm.
In the present embodiment, the shape of signle crystal alumina temperature, pressure combined measurement probe is cylindric, signle crystal alumina temperature
Spend pressure combined measurement probe the preparation method comprises the following steps: successively carrying out oil processing with acetone, alcohol to signle crystal alumina first, so
Use partial size for the Al of 120 mesh afterwards2O3Particle carries out blasting treatment to signle crystal alumina, and it is (coarse to obtain uniform surface roughness
The range of degree is 5 μm), plasma spraying method is then used, by Zr3Y4O12: Eu and MFG mixed-powder are sprayed on monocrystalline oxidation
On aluminium.
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, Zr3Y4O12: Euu powder diameter is 40 μm, is prepared using reversed coprecipitation.It is preparing
Zr3Y4O12: when Eu 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, Eu2O3Powder dissolution, to Y2O3, Eu2O3Powder 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 Eu (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 acquisition phosphorescence powder for 24 hours at 950 DEG C at 120 DEG C.
By Zr3Y4O12: Eu is (Zr with MFG mixing phosphor powder, mixed weight ratio3Y4O12: Eu): (MFG)=2000:1,
2000 parts of Zr are weighed by mixed proportion 20003Y4O12: Eu and 1 part of MFG.Weighed MFG is put into isopropanol, isopropanol and MFG
Weight ratio be 1000:1. by weighed Zr3Y4O12: Eu is put into suspension made of MFG and isopropanol, is stirred, and stirs
Process is until isopropanol all volatilization.The Zr that will be mixed3Y4O12: Eu is dried with MFG mixing phosphor powder, dry temperature
250 DEG C of degree, time 2 h.
By the Zr of synthesis3Y4O12: Eu is granulated with MFG mixing phosphor powder by craft or spray drying process, and it is viscous that PVA is added
Agent is tied, dry, sieving, is suitable for the powder for carrying out plasma spraying to obtain good fluidity.
In the present embodiment, for temperature phosphorescence filter 9, using the bandpass filter mirror of 620~670nm；For pressure phosphorescence
Filter 10, using the bandpass filter mirror of 550~600nm.
Laser source wavelength is 405nm.The power of laser light source is 15W.The resistance adjustment range of resistance box is 1000 Ω.
In actual use, surface is deposited with Zr3Y4O12: Eu mixes the signle crystal alumina other end of phosphorescent layer 6 with MFG
Polishing connection fiber coupler 5 simultaneously connects optical fiber 3, and optical fiber 3 is sequentially connected laser light source 2 and signal projector 1 all the way, another
Road optical fiber 3 connect spectroscope 7, two-way optical path is separated by spectroscope, be separately connected 620~670nm temperature phosphorescence filter 9 and
The pressure phosphorescence filter 10 of 550~600nm, all the way light be then sequentially connected temperature photomultiplier tube 11, temperature and resistance case 13 and
For acquiring the oscillograph 15 of signal, another way light is sequentially connected pressure photoelectric multiplier tube 12, piezoresistive case 14 and for adopting
Collect the oscillograph 15 of signal.Wherein, the signal projector 1 of light source is also connected with oscillograph 15, can also obtain from oscillograph 15
To light signal spectral line.Signal projector 1 controls the light-pulse generator that laser light source 2 launches the specific frequency of needs.
In the operating condition, signal projector 1 controls laser light source 2 and emits the present embodiment temperature, pressure combined measurement system
Light-pulse generator out, Zr under the action of light-pulse generator, on temperature, pressure probe 43Y4O12: Eu mixes the sending of phosphorescent layer 6 with MFG
Phosphorescent signal, the phosphorescent signal mirror 7 that is split divide for two-way, and two-way phosphorescent signal penetrates temperature phosphorescence filter 9 and pressure respectively
Phosphorescence filter 10 is received by respective photomultiplier tube respectively, and temperature and pressure phosphorescent signal are converted into electricity by photomultiplier tube
Stream signal is simultaneously sent to resistance box, and reconvert is shown on oscillograph 15 at voltage signal, obtains two smooth phosphorescence and declines
Subtract curve, attenuation curve is fitted using software, obtains temperature phosphorescent lifetime (MFG signal) and temperature, pressure phosphorescent lifetime
(Zr3Y4O12: Eu signal), the calibration curve for compareing MFG phosphorescent lifetime and temperature obtains temperature value.Compare Zr3Y4O12: Eu phosphorescence
The calibration curve in service life and temperature, pressure obtains pressure value with reference to the temperature value that MFG is measured.
Based on Zr3Y4O12: the test method of the temperature, pressure combined measurement system of Eu and MFG phosphorescent lifetime, this method tool
Body the following steps are included:
(1) controlling laser light source to launch pulse width by signal projector is 5ms, and the pulse period is the arteries and veins of 1000ms
Wash source off；
(2) Zr under the action of light-pulse generator, on temperature, pressure probe3Y4O12: Eu mixes phosphorescent layer with MFG and issues phosphorus
Optical signal, the phosphorescent signal are divided into two ways of optical signals by spectroscope
(3) this two ways of optical signals is filtered off by phosphorescence filter, temperature and pressure phosphorescent signal respectively
(4) temperature is respectively received by photomultiplier tube with pressure phosphorescent signal.
(5) temperature phosphorescent signal is converted into current signal and is sent to temperature and resistance case by temperature photomultiplier tube, and is led to
Current signal is converted to voltage signal by excess temperature resistance box, and voltage signal is amplified, and is shown on oscillograph, and temperature phosphorus is obtained
Optical attenuation curve, as shown in Figure 2 a；
(6) by utilizing attenuation equation to temperature phosphor-decay curve, temperature phosphorescent lifetime, τ=0.34245ms are obtained；
(7) temperature information is obtained according to the calibration curve of temperature phosphorescent lifetime and temperature relation, wherein calibration curve is as schemed
Shown in 2b, temperature is 500 DEG C.
(8) pressure phosphorescent signal is converted into current signal and is sent to piezoresistive case by pressure photoelectric multiplier tube, and is led to
Current signal is converted to voltage signal by excess pressure resistance box, and voltage signal is amplified, and is shown on oscillograph, and pressure phosphorus is obtained
Optical attenuation curve, as shown in Figure 3a,
(9) by utilizing attenuation equation to pressure phosphor-decay curve, acquisition pressure phosphorescent lifetime is 180 μ s；
(10) amendment of combination temperature information selects 500 DEG C of pressure phosphorescent lifetime and pressure relationship plot, according to pressure
The calibration curve of phosphorescent lifetime and pressure dependence can get pressure information as shown in Figure 3b, it may be determined that pressure is -20kpa.
The present embodiment temperature, pressure combined measurement system can be used for measuring aero-engine or ground gas turbine is in work
Make the temperature under state.
Embodiment 2:
The present embodiment is substantially the same manner as Example 1, the difference is that, the wavelength of laser ultraviolet source is 380nm, light source
Power is 3w.The resistance of resistance box 6 is set as 300 Ω.
Claims (10)
1. a kind of temperature, pressure combined measurement system, which is characterized in that the measuring system includes temperature, pressure probe and temperature pressure
The fiber coupler of force probe connection, passes through optical fiber and optical fiber at the laser light source connecting by optical fiber with fiber coupler import
The spectroscope of coupler outlet connection and the signal processing unit that spectroscope different light paths rear is set, the temperature, pressure
The surface of probe coats Zr3Y4O12: Eu mixes phosphorescent layer, the Zr with MFG3Y4O12: Eu is mixed in phosphorescent layer with MFG
Zr3Y4O12: the mass ratio of Eu and MFG is (800~2500): the chemical formula of 1, the MFG are 3.5MgO0.5MgF2·GeO2:
Mn obtains temperature information using MFG, uses Zr3Y4O12: Eu obtains temperature and pressure related information, and further uses MFG and obtain
The temperature information taken is to Zr3Y4O12: the pressure and temp information that Eu is obtained is modified, and obtains pressure information.
2. a kind of temperature, pressure combined measurement system according to claim 1, which is characterized in that the Zr3Y4O12: in Eu
Include ZrO2、Y2O3And Eu2O3, wherein Y2O3Molar fraction be 35%~45%, Eu2O3Molar fraction be 0.1%~
The chemical formula of 2%, the MFG are 3.5MgO0.5MgF2·GeO2:Mn。
3. a kind of temperature, pressure combined measurement system according to claim 2, which is characterized in that the Zr3Y4O12: Eu's
Partial size is 40~100 μm, and the partial size of MFG is 5~15 μm.
4. a kind of temperature, pressure combined measurement system according to claim 1, which is characterized in that the Zr3Y4O12: Eu with
MFG mixes phosphorescent layer and is coated in temperature, pressure detecting probe surface, the Zr by the method for plasma spraying3Y4O12: Eu and MFG is mixed
Close phosphorescent layer with a thickness of 5~50 μm.
5. a kind of temperature, pressure combined measurement system according to claim 1, which is characterized in that the temperature, pressure probe
Cylindrical or disc-shaped, the material of the temperature, pressure probe are signle crystal alumina.
6. a kind of temperature, pressure combined measurement system according to claim 1, which is characterized in that the spectroscope is in isosceles
Triangle, spectroscopical bottom edge are connect with optical fiber, and two through being divided optical path is projected from a spectroscopical waist respectively, described
Signal processing unit includes processes temperature signal subelement and pressure signal processing subelement；
The processes temperature signal subelement includes the reflecting mirror being arranged in an optical path, temperature phosphorescence filter, temperature photoelectricity
Multiplier tube, temperature and resistance case and oscillograph；
The pressure signal processing subelement includes the reflecting mirror being arranged in another optical path, pressure phosphorescence filter, temperature light
Electric multiplier tube, piezoresistive case and oscillograph.
7. a kind of temperature, pressure combined measurement system according to claim 1, which is characterized in that the measuring system includes
One signal projector, the signal projector are connect with laser light source.
8. a kind of method for carrying out temperature, pressure combined measurement using the measuring system as described in claim 1~7 is any, feature
It is, including the following steps:
(1) blasting treatment is carried out in temperature, pressure detecting probe surface, then by Zr by the way of plasma spraying3Y4O12: Eu with
MFG mixes phosphorescent layer and is coated in temperature, pressure detecting probe surface；
(2) each component is assembled in order, forms measuring system；
(3) control laser light source projects light-pulse generator, and temperature phosphor-decay curve and pressure phosphor-decay are obtained in oscillograph
Curve, then temperature phosphor-decay curve utilizes attenuation equation using attenuation equation and pressure phosphor-decay curve, obtains temperature
Phosphorescent lifetime and pressure phosphorescent lifetime, to obtain temperature information and pressure information.
9. a kind of temperature, pressure union measuring method according to claim 8, which is characterized in that the pressure of the sandblasting is
0.1~0.7MPa, shot blasting particles are the Al that partial size is 16~120 mesh2O3Particle；
The temperature of the plasma spraying control matrix is 200~600 DEG C, and the spacing of spray gun and matrix is 90~250mm, spray gun
Movement speed is 300~1000mm/s, and powder feed rate is 10~70g/min, and powder feeding air-flow is 0.5~1.2L/min, spraying electricity
Pressure is 100~180V, and spraying current is 200~250A, and argon gas flow velocity is 40~120L/min, and hydrogen flow rate is 15~45L/
min。
10. a kind of temperature, pressure union measuring method according to claim 8, which is characterized in that the light-pulse generator
Width is 1~5ms, and the pulse period is 10~1000ms.
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