CN112129804B - Measurement system for be used for high temperature material radiation characteristic - Google Patents
Measurement system for be used for high temperature material radiation characteristic Download PDFInfo
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- CN112129804B CN112129804B CN202010979668.0A CN202010979668A CN112129804B CN 112129804 B CN112129804 B CN 112129804B CN 202010979668 A CN202010979668 A CN 202010979668A CN 112129804 B CN112129804 B CN 112129804B
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- 239000000463 material Substances 0.000 title claims abstract description 102
- 230000005855 radiation Effects 0.000 title claims abstract description 57
- 238000005259 measurement Methods 0.000 title claims abstract description 37
- 238000010438 heat treatment Methods 0.000 claims abstract description 113
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 62
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 32
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 32
- 239000013307 optical fiber Substances 0.000 claims abstract description 31
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052724 xenon Inorganic materials 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 19
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000012360 testing method Methods 0.000 claims abstract description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000010453 quartz Substances 0.000 claims abstract description 11
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 230000003595 spectral effect Effects 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 238000001228 spectrum Methods 0.000 claims description 9
- 230000017525 heat dissipation Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 6
- PFNQVRZLDWYSCW-UHFFFAOYSA-N (fluoren-9-ylideneamino) n-naphthalen-1-ylcarbamate Chemical compound C12=CC=CC=C2C2=CC=CC=C2C1=NOC(=O)NC1=CC=CC2=CC=CC=C12 PFNQVRZLDWYSCW-UHFFFAOYSA-N 0.000 claims description 5
- 238000004093 laser heating Methods 0.000 claims description 5
- 238000002310 reflectometry Methods 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- -1 polytetrafluoroethylene Polymers 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 239000004809 Teflon Substances 0.000 claims 1
- 229920006362 Teflon® Polymers 0.000 claims 1
- 230000001276 controlling effect Effects 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 9
- 238000005457 optimization Methods 0.000 description 7
- 239000000843 powder Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 238000010248 power generation Methods 0.000 description 5
- 238000001028 reflection method Methods 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3563—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solids; Preparation of samples therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N2021/3595—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using FTIR
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- General Physics & Mathematics (AREA)
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- Spectroscopy & Molecular Physics (AREA)
- Radiation Pyrometers (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention discloses a measurement system for radiation characteristics of a high-temperature material, which comprises a shading box, a heating module and an absorptivity measurement module, wherein the shading box is arranged on the shading box; the heating module comprises a heating seat, a rack, a carbon dioxide laser, a reflecting mirror, a condensing mirror and a water cooling machine; the absorptivity measuring module comprises a xenon lamp, a collecting lens, an integrating sphere, a bicolor infrared thermometer, a quartz optical fiber, an optical fiber spectrometer and a calculating unit. The invention can also adopt another scheme, comprising a shading box, a nitrogen gas cylinder, an atmosphere chamber, a heating module and an emissivity measuring module; the shading box, the heating module and the above module are the same, and the emissivity measuring module comprises a bicolor infrared thermometer, a blackbody furnace, a rotating mirror bracket, a collimating mirror, a Fourier infrared spectrometer and a calculating unit. The invention can make the sample reach different temperatures through regulating and controlling the laser power, and can test the absorptivity of the material in the high temperature to solar radiation and mid-infrared wavelength range.
Description
Technical Field
The invention relates to the technical field of supercritical carbon dioxide solar thermal power generation, in particular to a measurement system for radiation characteristics of high-temperature materials.
Background
Solar thermal power generation is the primary means of solar heat utilization. The solar energy is converted into heat energy of a working medium through the heat collector, so that thermal cycle power generation is driven, and the conversion process of the solar energy is realized. Solar collectors are very important components in solar thermal power generation systems, which not only convert the radiant energy of the sun into thermal energy, but also have a great impact on the performance of the power generation and thermal storage systems. The solar heat collector mainly comprises a liquid heat collector, a gas heat collector and a solid particle heat collector, wherein the outlet temperature of the solid particle heat collector can reach more than 1000 ℃, the heat efficiency is high, and the solar heat collector has wide application prospect in supercritical CO 2 thermodynamic cycle. Because the solid particles directly absorb solar energy, both the ability of the particles to absorb solar energy and the ability of the particles to radiate outward directly affect the performance of the particle absorber. At present, the absorptivity and the infrared emissivity of an object to solar energy are tested, and the transmissivity and the reflectivity of the object are mostly measured through an ultraviolet-visible-near infrared spectrophotometer and a Fourier infrared spectrometer, so that the absorptivity and the emissivity are calculated. The temperature of the particles increases after absorbing solar energy, and therefore it is necessary to test the absorptivity and emissivity of the particles at high temperatures to evaluate the performance of the solid particle absorber.
Methods for measuring the absorptivity of materials mainly include an energy method and a reflection method. The reflection method is to test the reflectivity and the transmissivity of the material through an integrating sphere and obtain the absorptivity according to the conservation of energy. The energy method is to measure the radiation force of the material and the blackbody by a Fourier infrared spectrometer under the same temperature and working condition according to the definition of the emissivity, calculate the emissivity, and obtain the absorptivity according to kirchhoff's law. The two methods are characterized in that: the reflection method can theoretically measure the material at any temperature, but the integrating sphere needs to be correspondingly modified, so that the experimental difficulty is high. The energy method is used for testing the experiment system, the structure is simple, the principle is clear, but the radiation force distribution of the material is required to be within the testing range, otherwise, the spectrometer cannot detect the corresponding energy signal. The main points and the difficulties of the measurement of the spectral radiation characteristics of the high-temperature material are as follows:
(1) The measuring method comprises the following steps: the system needs to test the radiation characteristics of any different temperature within 0-1000 ℃, and is difficult to measure the absorptivity of the solar radiation wave band by an energy method, so that the absorptivity of the material in the ultraviolet, visible and near infrared rays needs to be indirectly measured through an integrating sphere, and the emissivity of the material in the middle infrared wave band is measured by the energy method.
(2) The heating mode is as follows: the material is mainly particles. The material is small in size, high in heating temperature and capable of avoiding interference caused by environmental temperature rise during heating. There is a need for precise heating of the material and for reduced ambient temperature rise.
(3) The temperature measurement mode is as follows: the test materials are mainly particles, the diameter is generally 0-10mm, the surface is spherical, and contact type measurement methods such as thermocouples and the like are difficult to implement.
(4) Background interference is reduced: the ultraviolet-visible band test is greatly influenced by visible light in the environment, while the middle-infrared band test is greatly influenced by water vapor and carbon dioxide, and background interference caused by the environment is required to be reduced through a light shielding box and inert atmosphere.
Disclosure of Invention
The invention aims at solving the technical problems related to the background technology, and provides a measuring system for the radiation characteristics of a high-temperature material so as to realize the measurement of solar band absorptivity and mid-infrared band emissivity of the material at different temperatures.
The invention adopts the following technical scheme for solving the technical problems:
a measurement system for radiation characteristics of high-temperature materials comprises a shading box, a heating module and an absorptivity measurement module;
The shading box is used for shielding an external light source so as to enable the interior of the shading box to be in a matt state;
the heating module comprises a heating seat, a rack, a carbon dioxide laser, a reflecting mirror, a condensing mirror and a water cooling machine, wherein the heating seat, the rack, the carbon dioxide laser, the reflecting mirror and the condensing mirror are all arranged in a light shielding box, and the water cooling machine is arranged outside the light shielding box;
The heating seat is made of a material with low heat conductivity coefficient and comprises a base and a heating table, wherein the base is provided with a through hole for laser to irradiate to the heating table; the heating table is fixed on the base and is used for placing an opaque material to be measured, so that laser passing through the through hole of the base can irradiate the material fixed on the heating table;
The base is fixed on the bench; a cavity is arranged in the rack, and a light inlet and a light outlet are arranged on the rack; the reflecting mirrors and the collecting mirrors are arranged in the cavity of the rack;
The carbon dioxide laser is used for emitting laser, so that the laser irradiates onto the reflecting mirror in the cavity of the bench from the light inlet of the bench;
The reflecting mirror is used for reflecting the laser emitted by the carbon dioxide laser to the collecting mirror;
The collecting lens is used for radiating laser reflected by the reflecting mirror to the bottom of the heating table from the light outlet of the bench through the through hole on the base after focusing the laser to improve the energy density so as to heat the material with the measurement on the heating table;
A fluid channel for heat dissipation is arranged in the base, and a water inlet and a water outlet which are connected with the fluid channel are arranged on the surface of the base;
The output port and the input port of the water cooling machine extend into the shading box through pipelines respectively and are correspondingly connected with the water inlet and the water outlet on the surface of the base, so as to radiate the substrate;
the absorption rate measurement module comprises a xenon lamp, a collecting lens, an integrating sphere, a bicolor infrared thermometer, a quartz optical fiber, an optical fiber spectrometer and a calculation unit, wherein the xenon lamp, the collecting lens, the integrating sphere and the bicolor infrared thermometer are arranged in a light shielding box, and the optical fiber spectrometer and the calculation unit are arranged outside the light shielding box;
The integrating sphere is provided with a light emitting hole, a light transmitting hole and a temperature measuring hole, and is fixedly connected with the heating table through the light emitting hole, and a material to be measured is placed in the integrating sphere;
The xenon lamp and the light-transmitting mirror are arranged outside the integrating sphere, and the xenon lamp is used for simulating sunlight, converging and shrinking light spots through the collecting mirror and then irradiating the sunlight onto a material to be measured through the light-transmitting hole on the integrating sphere;
The bicolor infrared thermometer is arranged outside the integrating sphere, is aligned with the material to be measured through the temperature measuring hole, and is used for measuring the temperature of the material to be measured and transmitting the temperature to the calculating unit;
One end of the quartz optical fiber is communicated with the inner cavity of the integrating sphere, and the other end of the quartz optical fiber passes through the light shielding box and is connected with the optical fiber spectrometer and is used for transmitting light which is diffusely reflected in the integrating sphere to the optical fiber spectrometer;
the optical fiber spectrometer is used for analyzing the spectrum information of the received light and transmitting the spectrum information to the computing unit;
The calculating unit is electrically connected with the bicolor infrared thermometer and the optical fiber spectrometer respectively and is used for calculating the absorptivity of the material to be measured to the solar wave band at the current temperature according to the received spectrum information.
As a further optimization scheme of the measurement system for the radiation characteristics of the high-temperature materials, the heating seat and the rack are made of 310s stainless steel, so that the heating seat is prevented from being damaged due to the fact that the laser heating temperature is too high.
As a further optimization scheme of the measuring system for the radiation characteristics of the high-temperature material, the inner wall of the shading box is coated with a coating for absorbing light so as to reduce the interference of external visible light.
As a further optimization scheme of the measurement system for the radiation characteristics of the high-temperature material, the polytetrafluoroethylene coating is coated on the heating table, so that incident light emitted by the xenon lamp is not absorbed by the heating cavity base, and the interference of the test is reduced.
The invention also discloses another measuring system for the radiation characteristics of the high-temperature material, which comprises a shading box, a nitrogen gas cylinder, an atmosphere chamber, a heating module and an emissivity measuring module;
The shading box is used for shielding an external light source so as to enable the interior of the shading box to be in a matt state; the nitrogen cylinder is arranged outside the shading box;
The atmosphere chamber is arranged in the light shielding box, a laser hole, a temperature measuring hole, a nitrogen hole, a radiation inlet and a radiation outlet are formed in the atmosphere chamber, sealed zinc selenide glass is arranged on the laser hole, sealed quartz glass is arranged on the temperature measuring hole, and the nitrogen hole penetrates out of the light shielding box through a pipeline and is communicated with the outlet of the nitrogen gas cylinder;
The heating module comprises a heating seat, a rack, a carbon dioxide laser, a reflecting mirror, a condensing mirror and a water cooling machine, wherein the carbon dioxide laser is arranged in a light shielding box and outside an atmosphere chamber, the heating seat, the rack, the reflecting mirror and the condensing mirror are all arranged in the atmosphere chamber, and the water cooling machine is arranged outside the light shielding box;
The heating seat is made of a material with low heat conductivity coefficient and comprises a base and a heating table, wherein the base is provided with a through hole for laser to irradiate to the heating table; the heating table is fixed on the base and is used for placing an opaque material to be measured, so that laser passing through the through hole of the base can irradiate the material fixed on the heating table;
The base is fixed on the bench; a cavity is arranged in the rack, and a light inlet and a light outlet are arranged on the rack; the reflecting mirrors and the collecting mirrors are arranged in the cavity of the rack;
The carbon dioxide laser is used for emitting laser, so that the laser sequentially passes through the laser hole of the atmosphere chamber and the light inlet of the rack and irradiates on the reflecting mirror in the cavity of the rack;
The reflecting mirror is used for reflecting the laser emitted by the carbon dioxide laser to the collecting mirror;
The collecting lens is used for radiating laser reflected by the reflecting mirror to the bottom of the heating table from the light outlet of the bench through the through hole on the base after focusing the laser to improve the energy density so as to heat the material with the measurement on the heating table;
A fluid channel for heat dissipation is arranged in the base, and a water inlet and a water outlet which are connected with the fluid channel are arranged on the surface of the base;
The output port and the input port of the water cooling machine extend into the shading box through pipelines respectively and are correspondingly connected with the water inlet and the water outlet on the surface of the base, so as to radiate the substrate;
the emissivity measurement module comprises a bicolor infrared thermometer, a blackbody furnace, a rotating mirror bracket, a collimating mirror, a Fourier infrared spectrometer and a calculation unit;
the bicolor infrared thermometer is arranged outside the atmosphere, is aligned to the material to be measured through the temperature measuring hole, and is used for measuring the temperature of the material to be measured and transmitting the temperature to the calculating unit;
the input end of the blackbody furnace is connected with the radiation inlet of the atmosphere chamber in a sealing way, and the input end of the Fourier infrared spectrometer is connected with the radiation outlet of the atmosphere chamber in a sealing way through a pipeline;
The collimating mirror is arranged in the atmosphere chamber through a rotating mirror bracket, and the rotating mirror bracket is used for adjusting the angle of the collimating mirror and introducing infrared radiation of a material to be measured or a blackbody furnace into the Fourier infrared spectrometer;
The Fourier infrared spectrometer is used for analyzing the introduced infrared radiation to obtain the middle infrared band spectral emissivity of the infrared radiation, and transmitting the middle infrared band spectral emissivity to the computing unit;
the computing unit is electrically connected with the carbon dioxide laser, the bicolor infrared thermometer, the blackbody furnace and the Fourier infrared spectrometer respectively and is used for obtaining the middle infrared band spectral emissivity of the blackbody furnace and the material to be measured at the same temperature, and further computing the emissivity of the material to be measured in the middle infrared band.
As a further optimization scheme of the measuring system for the radiation characteristics of the high-temperature materials, the heating seat and the rack are made of 310s stainless steel, so that the heating seat is prevented from being damaged due to the fact that the laser heating temperature is too high.
As a further optimization of the further measurement system for the radiation characteristics of the high-temperature material, the inner wall of the shading box is coated with a coating for absorbing light so as to reduce the interference of external visible light.
As a further optimization scheme of the measurement system for the radiation characteristics of the high-temperature materials, the heating table is coated with the polytetrafluoroethylene coating, so that incident light emitted by the xenon lamp is not absorbed by the heating cavity base, and the interference of the test is reduced.
As a further optimization scheme of the measuring system for the radiation characteristics of the high-temperature materials, the surface of the collimating mirror is provided with a gold-plated protective film, and the collimating mirror has high reflectivity to infrared radiation in the range of 2.5-25 mu m.
Compared with the prior art, the technical scheme provided by the invention has the following technical effects:
the invention can make the sample reach different temperatures through regulating and controlling the laser power, and can test the absorptivity of the material in the high temperature to solar radiation and mid-infrared wavelength range.
Drawings
FIG. 1 is a schematic diagram of a system (ultraviolet visible near infrared wavelength range) for measuring radiation characteristics of a high temperature material according to the present invention;
FIG. 2 is a schematic diagram of the structure of a measurement system (mid-infrared wavelength range) for the radiation characteristics of the high temperature material of the present invention;
In the figure, a 1-xenon lamp, a 2-collecting lens, a 3-integrating sphere, a 4-quartz optical fiber, a 5-optical fiber spectrometer, a 6-calculating unit, a 7-carbon dioxide laser, an 8-reflecting mirror, a 9-laser collecting lens, a 10-bench, an 11-heating seat, a 12-water cooler, a 13-material to be measured, a 14-bicolor infrared thermometer, a 15-light shielding box, a 16-Fourier infrared spectrometer, a 17-collimating mirror, an 18-blackbody furnace, a 19-rotating mirror holder, a 20-atmosphere chamber, a 21-laser port, a 22-temperature measuring port and a 23-nitrogen gas cylinder.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the accompanying drawings:
This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the components are exaggerated for clarity.
As shown in fig. 1, the invention discloses a measurement system for radiation characteristics of a high-temperature material, which comprises a light shielding box, a heating module and an absorptivity measurement module;
The shading box is used for shielding an external light source so as to enable the interior of the shading box to be in a matt state;
the heating module comprises a heating seat, a rack, a carbon dioxide laser, a reflecting mirror, a condensing mirror and a water cooling machine, wherein the heating seat, the rack, the carbon dioxide laser, the reflecting mirror and the condensing mirror are all arranged in a light shielding box, and the water cooling machine is arranged outside the light shielding box;
The heating seat is made of a material with low heat conductivity coefficient and comprises a base and a heating table, wherein the base is provided with a through hole for laser to irradiate to the heating table; the heating table is fixed on the base and is used for placing an opaque material to be measured, so that laser passing through the through hole of the base can irradiate the material fixed on the heating table;
The base is fixed on the bench; a cavity is arranged in the rack, and a light inlet and a light outlet are arranged on the rack; the reflecting mirrors and the collecting mirrors are arranged in the cavity of the rack;
The carbon dioxide laser is used for emitting laser, so that the laser irradiates onto the reflecting mirror in the cavity of the bench from the light inlet of the bench;
The reflecting mirror is used for reflecting the laser emitted by the carbon dioxide laser to the collecting mirror;
The collecting lens is used for radiating laser reflected by the reflecting mirror to the bottom of the heating table from the light outlet of the bench through the through hole on the base after focusing the laser to improve the energy density so as to heat the material with the measurement on the heating table;
A fluid channel for heat dissipation is arranged in the base, and a water inlet and a water outlet which are connected with the fluid channel are arranged on the surface of the base;
The output port and the input port of the water cooling machine extend into the shading box through pipelines respectively and are correspondingly connected with the water inlet and the water outlet on the surface of the base, so as to radiate the substrate;
the absorption rate measurement module comprises a xenon lamp, a collecting lens, an integrating sphere, a bicolor infrared thermometer, a quartz optical fiber, an optical fiber spectrometer and a calculation unit, wherein the xenon lamp, the collecting lens, the integrating sphere and the bicolor infrared thermometer are arranged in a light shielding box, and the optical fiber spectrometer and the calculation unit are arranged outside the light shielding box;
The integrating sphere is provided with a light emitting hole, a light transmitting hole and a temperature measuring hole, and is fixedly connected with the heating table through the light emitting hole, and a material to be measured is placed in the integrating sphere;
The xenon lamp and the light-transmitting mirror are arranged outside the integrating sphere, and the xenon lamp is used for simulating sunlight, converging and shrinking light spots through the collecting mirror and then irradiating the sunlight onto a material to be measured through the light-transmitting hole on the integrating sphere;
The bicolor infrared thermometer is arranged outside the integrating sphere, is aligned with the material to be measured through the temperature measuring hole, and is used for measuring the temperature of the material to be measured and transmitting the temperature to the calculating unit;
One end of the quartz optical fiber is communicated with the inner cavity of the integrating sphere, and the other end of the quartz optical fiber passes through the light shielding box and is connected with the optical fiber spectrometer and is used for transmitting light which is diffusely reflected in the integrating sphere to the optical fiber spectrometer;
the optical fiber spectrometer is used for analyzing the spectrum information of the received light and transmitting the spectrum information to the computing unit;
The calculating unit is electrically connected with the bicolor infrared thermometer and the optical fiber spectrometer respectively and is used for calculating the absorptivity of the material to be measured to the solar wave band at the current temperature according to the received spectrum information.
As shown in fig. 2, the invention also discloses another measurement system for radiation characteristics of high-temperature materials, which comprises a light shielding box, a nitrogen gas cylinder, an atmosphere chamber, a heating module and an emissivity measurement module;
The shading box is used for shielding an external light source so as to enable the interior of the shading box to be in a matt state; the nitrogen cylinder is arranged outside the shading box;
The atmosphere chamber is arranged in the light shielding box, a laser hole, a temperature measuring hole, a nitrogen hole, a radiation inlet and a radiation outlet are formed in the atmosphere chamber, sealed zinc selenide glass is arranged on the laser hole, sealed quartz glass is arranged on the temperature measuring hole, and the nitrogen hole penetrates out of the light shielding box through a pipeline and is communicated with the outlet of the nitrogen gas cylinder;
The heating module comprises a heating seat, a rack, a carbon dioxide laser, a reflecting mirror, a condensing mirror and a water cooling machine, wherein the carbon dioxide laser is arranged in a light shielding box and outside an atmosphere chamber, the heating seat, the rack, the reflecting mirror and the condensing mirror are all arranged in the atmosphere chamber, and the water cooling machine is arranged outside the light shielding box;
The heating seat is made of a material with low heat conductivity coefficient and comprises a base and a heating table, wherein the base is provided with a through hole for laser to irradiate to the heating table; the heating table is fixed on the base and is used for placing an opaque material to be measured, so that laser passing through the through hole of the base can irradiate the material fixed on the heating table;
The base is fixed on the bench; a cavity is arranged in the rack, and a light inlet and a light outlet are arranged on the rack; the reflecting mirrors and the collecting mirrors are arranged in the cavity of the rack;
The carbon dioxide laser is used for emitting laser, so that the laser sequentially passes through the laser hole of the atmosphere chamber and the light inlet of the rack and irradiates on the reflecting mirror in the cavity of the rack;
The reflecting mirror is used for reflecting the laser emitted by the carbon dioxide laser to the collecting mirror;
The collecting lens is used for radiating laser reflected by the reflecting mirror to the bottom of the heating table from the light outlet of the bench through the through hole on the base after focusing the laser to improve the energy density so as to heat the material with the measurement on the heating table;
A fluid channel for heat dissipation is arranged in the base, and a water inlet and a water outlet which are connected with the fluid channel are arranged on the surface of the base;
The output port and the input port of the water cooling machine extend into the shading box through pipelines respectively and are correspondingly connected with the water inlet and the water outlet on the surface of the base, so as to radiate the substrate;
the emissivity measurement module comprises a bicolor infrared thermometer, a blackbody furnace, a rotating mirror bracket, a collimating mirror, a Fourier infrared spectrometer and a calculation unit;
the bicolor infrared thermometer is arranged outside the atmosphere, is aligned to the material to be measured through the temperature measuring hole, and is used for measuring the temperature of the material to be measured and transmitting the temperature to the calculating unit;
the input end of the blackbody furnace is connected with the radiation inlet of the atmosphere chamber in a sealing way, and the input end of the Fourier infrared spectrometer is connected with the radiation outlet of the atmosphere chamber in a sealing way through a pipeline;
The collimating mirror is arranged in the atmosphere chamber through a rotating mirror bracket, and the rotating mirror bracket is used for adjusting the angle of the collimating mirror and introducing infrared radiation of a material to be measured or a blackbody furnace into the Fourier infrared spectrometer;
The Fourier infrared spectrometer is used for analyzing the introduced infrared radiation to obtain the middle infrared band spectral emissivity of the infrared radiation, and transmitting the middle infrared band spectral emissivity to the computing unit;
the computing unit is electrically connected with the carbon dioxide laser, the bicolor infrared thermometer, the blackbody furnace and the Fourier infrared spectrometer respectively and is used for obtaining the middle infrared band spectral emissivity of the blackbody furnace and the material to be measured at the same temperature, and further computing the emissivity of the material to be measured in the middle infrared band.
In the two systems, the heating module and the light shielding box are the same, and the heating seat and the rack are made of 310s stainless steel, so that the heating seat is prevented from being damaged due to the fact that the laser heating temperature is too high; the inner wall of the shading box is coated with a coating for absorbing light so as to reduce the interference of external visible light; and the heating table is coated with a polytetrafluoroethylene coating, so that incident light emitted by the xenon lamp is not absorbed by the heating cavity base, and the test interference is reduced.
The heating table may take different configurations when heating solids, powders, granules. When the particles are heated, the heating table is in a ring shape, the outer edge of the heating table is coaxially and fixedly connected with the end face with the smaller diameter of the base, the diameter of the central through hole of the heating table is smaller than that of the particles, and the particles are ensured to be fixed and the interference of laser passing through the particles to the test can be avoided; when the powder material is heated, the heating table adopts a powder pool which is coaxially and fixedly connected with the end face with the smaller diameter of the base, the bottom wall of the powder pool is made of zinc selenide material, and the zinc selenide has high transmittance to laser, so that the laser can irradiate the material to be measured in the powder pool through the bottom wall of the powder pool; when heating solid material, the heating platform is the ring form, and the outer fringe of heating platform links firmly with the less terminal surface of base diameter is coaxial, and the diameter of heating platform center through-hole is less than the diameter of solid, and the structure is similar to the structure that adopts when heating the granule, and the diameter of heating platform center through-hole is great.
By adjusting the power of the carbon dioxide laser, the heating temperature of the material to be measured can be adjusted.
The material to be measured is an opaque material in order to prevent interference of light emitted from the xenon lamp and the laser through the sample.
The computing unit can adopt a singlechip or a computer.
In addition, in the second scheme, the surface of the collimating mirror is provided with a gold-plated protective film, and the collimating mirror has high reflectivity to infrared radiation in the range of 2.5-25 mu m.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (9)
1. A measurement system for radiation characteristics of a high temperature material, comprising a light shielding box, a heating module and an absorptivity measurement module;
The shading box is used for shielding an external light source so as to enable the interior of the shading box to be in a matt state;
the heating module comprises a heating seat, a rack, a carbon dioxide laser, a reflecting mirror, a condensing mirror and a water cooling machine, wherein the heating seat, the rack, the carbon dioxide laser, the reflecting mirror and the condensing mirror are all arranged in a light shielding box, and the water cooling machine is arranged outside the light shielding box;
The heating seat is made of a material with low heat conductivity coefficient and comprises a base and a heating table, wherein the base is provided with a through hole for laser to irradiate to the heating table; the heating table is fixed on the base and is used for placing an opaque material to be measured, so that laser passing through the through hole of the base can irradiate the material fixed on the heating table;
The base is fixed on the bench; a cavity is arranged in the rack, and a light inlet and a light outlet are arranged on the rack; the reflecting mirrors and the collecting mirrors are arranged in the cavity of the rack;
The carbon dioxide laser is used for emitting laser, so that the laser irradiates onto the reflecting mirror in the cavity of the bench from the light inlet of the bench;
The reflecting mirror is used for reflecting the laser emitted by the carbon dioxide laser to the collecting mirror;
The collecting lens is used for radiating laser reflected by the reflecting mirror to the bottom of the heating table from the light outlet of the bench through the through hole on the base after focusing the laser to improve the energy density so as to heat the material with the measurement on the heating table;
A fluid channel for heat dissipation is arranged in the base, and a water inlet and a water outlet which are connected with the fluid channel are arranged on the surface of the base;
The output port and the input port of the water cooling machine extend into the shading box through pipelines respectively and are correspondingly connected with the water inlet and the water outlet on the surface of the base, so as to radiate the substrate;
the absorption rate measurement module comprises a xenon lamp, a collecting lens, an integrating sphere, a bicolor infrared thermometer, a quartz optical fiber, an optical fiber spectrometer and a calculation unit, wherein the xenon lamp, the collecting lens, the integrating sphere and the bicolor infrared thermometer are arranged in a light shielding box, and the optical fiber spectrometer and the calculation unit are arranged outside the light shielding box;
The integrating sphere is provided with a light emitting hole, a light transmitting hole and a temperature measuring hole, and is fixedly connected with the heating table through the light emitting hole, and a material to be measured is placed in the integrating sphere;
The xenon lamp and the light-transmitting mirror are arranged outside the integrating sphere, and the xenon lamp is used for simulating sunlight, converging and shrinking light spots through the collecting mirror and then irradiating the sunlight onto a material to be measured through the light-transmitting hole on the integrating sphere;
The bicolor infrared thermometer is arranged outside the integrating sphere, is aligned with the material to be measured through the temperature measuring hole, and is used for measuring the temperature of the material to be measured and transmitting the temperature to the calculating unit;
One end of the quartz optical fiber is communicated with the inner cavity of the integrating sphere, and the other end of the quartz optical fiber passes through the light shielding box and is connected with the optical fiber spectrometer and is used for transmitting light which is diffusely reflected in the integrating sphere to the optical fiber spectrometer;
the optical fiber spectrometer is used for analyzing the spectrum information of the received light and transmitting the spectrum information to the computing unit;
The calculating unit is electrically connected with the bicolor infrared thermometer and the optical fiber spectrometer respectively and is used for calculating the absorptivity of the material to be measured to the solar wave band at the current temperature according to the received spectrum information.
2. The measurement system for radiation characteristics of a high temperature material according to claim 1, wherein the heating base and the stage are made of 310s stainless steel, and damage to the heating base due to an excessive laser heating temperature is prevented.
3. The measurement system for radiation characteristics of a high temperature material according to claim 1, wherein the inner wall of the light shielding box is coated with a coating for absorbing light to reduce interference of external visible light.
4. The measurement system for the radiation characteristics of a high temperature material of claim 1, wherein the heating table is coated with a polytetrafluoroethylene coating such that incident light from the xenon lamp is not absorbed by the heating chamber base, reducing test interference.
5. The measuring system for the radiation characteristics of the high-temperature material is characterized by comprising a shading box, a nitrogen gas cylinder, an atmosphere chamber, a heating module and an emissivity measuring module;
The shading box is used for shielding an external light source so as to enable the interior of the shading box to be in a matt state; the nitrogen cylinder is arranged outside the shading box;
The atmosphere chamber is arranged in the light shielding box, a laser hole, a temperature measuring hole, a nitrogen hole, a radiation inlet and a radiation outlet are formed in the atmosphere chamber, sealed zinc selenide glass is arranged on the laser hole, sealed quartz glass is arranged on the temperature measuring hole, and the nitrogen hole penetrates out of the light shielding box through a pipeline and is communicated with the outlet of the nitrogen gas cylinder;
The heating module comprises a heating seat, a rack, a carbon dioxide laser, a reflecting mirror, a condensing mirror and a water cooling machine, wherein the carbon dioxide laser is arranged in a light shielding box and outside an atmosphere chamber, the heating seat, the rack, the reflecting mirror and the condensing mirror are all arranged in the atmosphere chamber, and the water cooling machine is arranged outside the light shielding box;
The heating seat is made of a material with low heat conductivity coefficient and comprises a base and a heating table, wherein the base is provided with a through hole for laser to irradiate to the heating table; the heating table is fixed on the base and is used for placing an opaque material to be measured, so that laser passing through the through hole of the base can irradiate the material fixed on the heating table;
The base is fixed on the bench; a cavity is arranged in the rack, and a light inlet and a light outlet are arranged on the rack; the reflecting mirrors and the collecting mirrors are arranged in the cavity of the rack;
The carbon dioxide laser is used for emitting laser, so that the laser sequentially passes through the laser hole of the atmosphere chamber and the light inlet of the rack and irradiates on the reflecting mirror in the cavity of the rack;
The reflecting mirror is used for reflecting the laser emitted by the carbon dioxide laser to the collecting mirror;
The collecting lens is used for radiating laser reflected by the reflecting mirror to the bottom of the heating table from the light outlet of the bench through the through hole on the base after focusing the laser to improve the energy density so as to heat the material with the measurement on the heating table;
A fluid channel for heat dissipation is arranged in the base, and a water inlet and a water outlet which are connected with the fluid channel are arranged on the surface of the base;
The output port and the input port of the water cooling machine extend into the shading box through pipelines respectively and are correspondingly connected with the water inlet and the water outlet on the surface of the base, so as to radiate the substrate;
the emissivity measurement module comprises a bicolor infrared thermometer, a blackbody furnace, a rotating mirror bracket, a collimating mirror, a Fourier infrared spectrometer and a calculation unit;
the bicolor infrared thermometer is arranged outside the atmosphere, is aligned to the material to be measured through the temperature measuring hole, and is used for measuring the temperature of the material to be measured and transmitting the temperature to the calculating unit;
the input end of the blackbody furnace is connected with the radiation inlet of the atmosphere chamber in a sealing way, and the input end of the Fourier infrared spectrometer is connected with the radiation outlet of the atmosphere chamber in a sealing way through a pipeline;
The collimating mirror is arranged in the atmosphere chamber through a rotating mirror bracket, and the rotating mirror bracket is used for adjusting the angle of the collimating mirror and introducing infrared radiation of a material to be measured or a blackbody furnace into the Fourier infrared spectrometer;
The Fourier infrared spectrometer is used for analyzing the introduced infrared radiation to obtain the middle infrared band spectral emissivity of the infrared radiation, and transmitting the middle infrared band spectral emissivity to the computing unit;
the computing unit is electrically connected with the carbon dioxide laser, the bicolor infrared thermometer, the blackbody furnace and the Fourier infrared spectrometer respectively and is used for obtaining the middle infrared band spectral emissivity of the blackbody furnace and the material to be measured at the same temperature, and further computing the emissivity of the material to be measured in the middle infrared band.
6. The measurement system for radiation characteristics of a high temperature material according to claim 5, wherein the heating base and the stage are made of 310s stainless steel, so as to prevent damage to the heating base caused by an excessive laser heating temperature.
7. The measurement system for radiation characteristics of a high temperature material according to claim 5, wherein the inner wall of the light shielding box is coated with a coating for absorbing light to reduce interference of external visible light.
8. The system of claim 5, wherein the heating table is coated with a teflon coating such that incident light from the xenon lamp is not absorbed by the heating chamber base, reducing test interference.
9. The system for measuring radiation characteristics of high temperature material according to claim 5, wherein the collimator lens surface is provided with a gold-plated protective film having a high reflectivity for infrared radiation in the range of 2.5 μm to 25 μm.
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| CN113607663B (en) * | 2021-07-06 | 2024-07-23 | 武汉理工大学 | Diffuse reflection type multipurpose multivariable coupling in-situ optical absorption testing device and method |
| CN114113219B (en) * | 2021-12-03 | 2023-11-17 | 哈尔滨工业大学 | Method and system for detecting damage of infrared coating |
| CN115452755B (en) * | 2022-09-16 | 2024-06-21 | 中国科学院沈阳自动化研究所 | High-temperature high-pressure gas infrared spectrum radiation and absorption characteristic measurement method |
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