CN106568511A - Method for eliminating influence on spatial target radiation characteristic ground simulation measurement caused by stray radiations - Google Patents
Method for eliminating influence on spatial target radiation characteristic ground simulation measurement caused by stray radiations Download PDFInfo
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- 230000005855 radiation Effects 0.000 title claims abstract description 169
- 238000004088 simulation Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000005259 measurement Methods 0.000 title claims abstract description 18
- 238000012360 testing method Methods 0.000 claims abstract description 62
- 238000004364 calculation method Methods 0.000 claims abstract description 29
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 230000004907 flux Effects 0.000 claims description 9
- 238000012546 transfer Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 6
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- 239000000243 solution Substances 0.000 claims description 6
- 238000001931 thermography Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
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- 238000011156 evaluation Methods 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 claims description 3
- 238000005286 illumination Methods 0.000 claims description 3
- 230000000704 physical effect Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000001052 transient effect Effects 0.000 claims description 3
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- 238000002310 reflectometry Methods 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/007—Radiation pyrometry, e.g. infrared or optical thermometry for earth observation
Abstract
The present invention relates to a method for eliminating influence on spatial target radiation characteristic ground simulation measurement caused by stray radiations and belongs to the target radiation characteristic measurement field. According to the method of the invention, the calculation model of test environment radiation characteristics is built; components are added into or removed from the model; the reflectivity of a designated surface is set; influence on a target component caused by stray radiations is separated; and therefore, simulation measurement errors can be decreased. The correctness of the calculation model and calculation conditions can be verified through comparing a test result and a calculation result, and therefore, the credibility of the calculation result can be ensured.
Description
Technical field
The invention belongs to infrared radiation characteristics fields of measurement, and in particular to a kind of stray radiation of rejecting is radiated to extraterrestrial target
The method that characteristic ground simulation measurement affects.
Background technology
For the infrared signature in ground goal in research under spatial environmentss, space simulator need to be typically set up
To simulate vacuum, low temperature and the heat radiation environment in space, then measured target is placed in space simulator, using infrared
Radiation-measurment equipment is measured.When space simulator simulation heat radiation environment and target real space environment heat
When radiation environment is consistent, can with ground test result equivalent target real space radiation characteristic.To simulate vacuum environment,
Space simulator is a vacuum airtight container, and vacuum is less than 10-3Pa, cross-ventilation heat transfer can ignore.To simulate mesh
Target heat radiation environment, typically also has solar radiation simulator, terrestrial radiation simulator and low temperature heat sink, simulates respectively in container
The deep space background of solar radiation, terrestrial radiation and 4K.Additionally, also having radiation-measurment equipment and other subsidiaries to fill in container
Put.
Due to the fact that, the Target Infrared Radiation feature for obtaining is measured in space simulator and is difficult to equivalent target
In the radiation characteristic of real space environment.
Reason one：Solar radiation simulator in addition to irradiating measured target can also be irradiated to other surfaces in container, cause
Reflection, forms stray radiation, affects measurement result, different in real space from target.
Reason two：The radiation of the measuring apparatus and aided measurement device generation in space simulator and reflected light are to mesh
Target radiation feature has an impact
Reason three：From on infrared radiation measurement equipment cannot discrimination objective amount of radiation be stray radiation or required radiation
Amount.
The method of there is presently no can eliminate impact of the stray radiation to testing, and impact of the stray radiation to test is not
Can ignore.For room temperature target, more than 10%, for Low Temperature Target, stray radiation affects very for the impact of stray radiation
To reachable more than 50%.Therefore, need badly develop a kind of method for stray radiation being rejected on infrared radiation characteristics measurement impact, with
Solve the above problems.
The content of the invention
The technical problem to be solved in the present invention is that a kind of stray radiation of rejecting measures the method for affecting to infrared radiation characteristics,
To improve the equivalent precision of Target Infrared Radiation feature.
In order to realize this purpose, the present invention is adopted the technical scheme that：
It is a kind of to reject the method that stray radiation is affected on infrared radiation characteristics simulation test, the extraterrestrial target of the method application
Radiation characteristic injection ground simulation test system is space simulator, is comprised the following steps：
Step 1：The amount of radiation of target is measured by ground experiment
(1.1) determine trystate
In extraterrestrial target radiation characteristic injection ground simulation test system, according to the radiation environment of real space environment, setting
Each parameters of operating part in environment simulator；
(1.2) carry out test
When in extraterrestrial target radiation characteristic injection ground simulation test system, each part reaches test condition, using infra-red radiation
Measuring apparatus are measured to the infra-red radiation of target, obtain amount of radiation of the target in the direction；
Step 2：Effective radiation of the Theoretical Calculation target along test equipment observed direction
(2.1) 3-D geometric model of each target in extraterrestrial target radiation characteristic injection ground simulation test system is set up, so
Afterwards based on the scene geometric model set up, the three-dimensional computations grid data solved needed for equation of heat balance is divided on the whole；
(2.2) scene that file assembles analysis needed for module is generated by target and scene is defined to calculate grid, scene；
(2.3) with scene grid data, target operating condition parameter and thermal physical property parameter, solar irradiation simulator parameter, calculating
Then control parameter and output control parameter etc. consider solar irradiation simulator, earth irradiation simulation as |input paramete
Device, heat sink mutual heat transfer between turntable and measured target, solve module by the three-dimensional radiation heat exchange worked out non-with three-dimensional
Steady-state heat balance equation solution module carries out coupling solution, to calculate transient state temperature field distributed data；
With reference to physical parameter and experimental condition according to each part, according to radiation environment evaluation and heat transfer equation, theoretical meter
Calculation obtains Temperature Distribution and radiant heat flux situation of the target under given measuring condition；
(2.4) based on each target temperature field data for solving acquisition, in calculating output experimental situation, target is set in thermal imaging system
Infrared characteristic distribution under standing wave section；
According to radiant heat flux transmission situation in the Temperature Distribution and simulator of target, target is calculated along test equipment observation side
To effective radiation；
Net long wave radiation includes the heat radiation of target itself and the background radiation of reflection；
Step 3：Computation model and result of calculation reliability demonstration
The result of the test of contrast step 1 and radiant heat flux transmission situation, checking meter in simulator in the result of calculation of step 2
Calculate the correctness of model and design conditions：
As the error ＜ 10% of the result of calculation of the result of the test and step 2 of step 1, confirm that computation model meets and want
Ask, the heat radiation environment of space simulator simulation is consistent in the heat radiation environment of real space environment with target；
When error >=10% of the result of calculation of the result of the test and step 2 of step 1, computation model is changed, until by mistake
Difference is less than 10%；
Step 4：Calculate the influence value of stray radiation
In computation model, by addition or removing component, the impact that each part is radiated to target component is calculated respectively；
The reflectance of the other surfaces outside the measured target that solar irradiation simulator is irradiated to be set to 0 with it is true
Value, calculates impact of the unnecessary solar radiation to target component radiation value；
Step 5：Stray radiation impact is deducted from test radiation value
The test radiation value of step 1 is deducted into the influence value that step 4 calculates gained, realizes that reduction stray radiation is special to radiation
Property measurement affect effect, obtain target emanation amount closer to target real space environment radiation value.
Further, the method that a kind of rejecting stray radiation as above is affected on infrared radiation characteristics simulation test,
Space simulator is vacuum airtight container, and vacuum is less than 10-3Solar radiation simulation is set in pa, space simulator
Device, terrestrial radiation simulator and low temperature are heat sink, respectively the deep space background of solar simulating radiation, terrestrial radiation and 4K；Spatial environmentss
Radiation-measurment equipment is additionally provided with simulator.
Further, the method that a kind of rejecting stray radiation as above is affected on infrared radiation characteristics simulation test,
A diameter of 3m of vacuum airtight container, material are rustless steel, and the temperature remains within the normal range for temperature；The irradiation of solar irradiation simulator is a diameter of
1m, output illumination are 1430W/m2；A diameter of 2.5m of earth irradiation simulator, temperature keep 300K, and slin emissivity is
0.95；The material that low temperature is heat sink be copper, temperature keep 85K, emissivity is 0.95；The initial temperature of measured target is 300K.
Further, the method that a kind of rejecting stray radiation as above is affected on infrared radiation characteristics simulation test,
In step (1.2), infrared radiation measurement equipment is thermal imaging system, and waveband selection is medium wave, the one kind in long wave.
Further, the method that a kind of rejecting stray radiation as above is affected on infrared radiation characteristics simulation test,
In step (2.1), in extraterrestrial target radiation characteristic injection ground simulation test system, the 3-D geometric model of each target is by following
One or more foundation in modeling tool：UG、ProE、Solidworks.
Further, the method that a kind of rejecting stray radiation as above is affected on infrared radiation characteristics simulation test,
In step 3, by adjusting the size of grid in three-dimensional computations grid data, examining boundary condition, Adjustable calculation model and reality
The similarity of situation is changing computation model.
The beneficial effects of the present invention is：By the computation model for setting up experimental enviroment radiation characteristic, add in a model
Or removing component, the reflectance of designated surface is set, impact of the stray radiation to target component is isolated, so as to reduce mould
Intend measurement error.By comparative test result and result of calculation, the correctness of computation model and design conditions can be verified, it is ensured that
Result of calculation is credible.
Description of the drawings
Fig. 1 is to reduce stray radiation to measure the method flow for affecting to the ground simulation of extraterrestrial target radiation characteristic.
Fig. 2 is extraterrestrial target radiation characteristic injection ground simulation test system composition schematic diagram.
In figure：1 is Dewar vessel, and 2 is liquid nitrogen heat sink, and 3 is solar irradiation simulator, and 4 is earth irradiation simulator, and 5 are
Turntable, 6 are measurement guide rail, and 7 is measuring apparatus, and 8 is measured target.
Specific embodiment
Technical solution of the present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
The core concept of the present invention is to set up the radiant heat transfer sub-model of space simulator, by Theoretical Calculation target
In the amount of radiation of space simulator.By contrasting the calculated results and ground test result, the accuracy of model is verified.
According to the model after checking, influence value of the stray radiation to target is calculated, ground test result is deducted into the impact of stray radiation
Value, obtain target emanation amount closer to target real space environment radiation value.As shown in figure 1, comprising the following steps that：
Step 1：The amount of radiation of target is measured by ground experiment
(1.1) determine trystate
In extraterrestrial target radiation characteristic injection ground simulation test system, according to the radiation environment of real space environment, setting
Each parameters of operating part in environment simulator；
As shown in Fig. 2 space simulator is vacuum airtight container, vacuum is less than 10-3Pa, space simulator
Interior setting solar radiation simulator, terrestrial radiation simulator and low temperature are heat sink, difference solar simulating radiation, terrestrial radiation and 4K's
Deep space background；Radiation-measurment equipment is additionally provided with space simulator.
A diameter of 3m of vacuum airtight container, material are rustless steel, and the temperature remains within the normal range for temperature；The irradiation of solar irradiation simulator
A diameter of 1m, output illumination are 1430W/m2；A diameter of 2.5m of earth irradiation simulator, temperature keep 300K, surface emitting
Rate is 0.95；The material that low temperature is heat sink be copper, temperature keep 85K, emissivity is 0.95；The initial temperature of measured target is
300K。
(1.2) carry out test
When in extraterrestrial target radiation characteristic injection ground simulation test system, each part reaches test condition, using infra-red radiation
Measuring apparatus are measured to the infra-red radiation of target, obtain amount of radiation of the target in the direction；
In the present embodiment, infrared radiation measurement equipment is thermal imaging system, and waveband selection is medium wave, the one kind in long wave.
Step 2：Effective radiation of the Theoretical Calculation target along test equipment observed direction
(2.1) 3-D geometric model of each target in extraterrestrial target radiation characteristic injection ground simulation test system is set up, so
Afterwards based on the scene geometric model set up, the three-dimensional computations grid data solved needed for equation of heat balance is divided on the whole；
In the present embodiment, in extraterrestrial target radiation characteristic injection ground simulation test system each target 3-D geometric model
Set up by one or more in following modeling tool：UG、ProE、Solidworks.
(2.2) scene that file assembles analysis needed for module is generated by target and scene is defined to calculate grid, scene；
(2.3) with scene grid data, target operating condition parameter and thermal physical property parameter, solar irradiation simulator parameter, calculating
Then control parameter and output control parameter etc. consider solar irradiation simulator, earth irradiation simulation as |input paramete
Device, heat sink mutual heat transfer between turntable and measured target, solve module by the three-dimensional radiation heat exchange worked out non-with three-dimensional
Steady-state heat balance equation solution module carries out coupling solution, to calculate transient state temperature field distributed data；
With reference to physical parameter and experimental condition according to each part, according to radiation environment evaluation and heat transfer equation, theoretical meter
Calculation obtains Temperature Distribution and radiant heat flux situation of the target under given measuring condition；
(2.4) based on each target temperature field data for solving acquisition, in calculating output experimental situation, target is set in thermal imaging system
Infrared characteristic distribution under standing wave section；
According to radiant heat flux transmission situation in the Temperature Distribution and simulator of target, target is calculated along test equipment observation side
To effective radiation；
Net long wave radiation includes the heat radiation of target itself and the background radiation of reflection；
Step 3：Computation model and result of calculation reliability demonstration
The result of the test of contrast step 1 and radiant heat flux transmission situation, checking meter in simulator in the result of calculation of step 2
Calculate the correctness of model and design conditions：
As the error ＜ 10% of the result of calculation of the result of the test and step 2 of step 1, confirm that computation model meets and want
Ask, the heat radiation environment of space simulator simulation is consistent in the heat radiation environment of real space environment with target；
When error >=10% of the result of calculation of the result of the test and step 2 of step 1, by adjusting three-dimensional computations grid
The size of grid in data, examine the similarity of boundary condition, Adjustable calculation model and practical situation to change computation model, directly
10% is less than to error；
Step 4：Calculate the influence value of stray radiation
In computation model, by addition or removing component, the impact that each part is radiated to target component is calculated respectively；
The reflectance of the other surfaces outside the measured target that solar irradiation simulator is irradiated to be set to 0 with it is true
Value, calculates impact of the unnecessary solar radiation to target component radiation value；
Step 5：Stray radiation impact is deducted from test radiation value
The test radiation value of step 1 is deducted into the influence value that step 4 calculates gained, realizes that reduction stray radiation is special to radiation
Property measurement affect effect, obtain target emanation amount closer to target real space environment radiation value.
Claims (6)
1. it is a kind of to reject the method that stray radiation is affected on infrared radiation characteristics simulation test, the extraterrestrial target spoke of the method application
Characteristic injection ground simulation test system is penetrated for space simulator, it is characterised in that comprise the following steps：
Step 1：The amount of radiation of target is measured by ground experiment
(1.1) determine trystate
In extraterrestrial target radiation characteristic injection ground simulation test system, according to the radiation environment of real space environment, set environment
Each parameters of operating part in simulator；
(1.2) carry out test
When in extraterrestrial target radiation characteristic injection ground simulation test system, each part reaches test condition, using infrared radiation measurement
Equipment is measured to the infra-red radiation of target, obtains amount of radiation of the target in the direction；
Step 2：Effective radiation of the Theoretical Calculation target along test equipment observed direction
(2.1) 3-D geometric model of each target in extraterrestrial target radiation characteristic injection ground simulation test system, Ran Houji are set up
In the scene geometric model set up, the three-dimensional computations grid data solved needed for equation of heat balance is divided on the whole；
(2.2) scene that file assembles analysis needed for module is generated by target and scene is defined to calculate grid, scene；
(2.3) with scene grid data, target operating condition parameter and thermal physical property parameter, solar irradiation simulator parameter, calculating control
Then parameter and output control parameter etc. consider solar irradiation simulator, earth irradiation simulator, heat as |input paramete
Heavy, the mutual heat transfer between turntable and measured target, solves module with three-dimensional unstable state heat by the three-dimensional radiation heat exchange worked out
Equilibrium equation solves module and carries out coupling solution, to calculate transient state temperature field distributed data；
With reference to physical parameter and experimental condition according to each part, according to radiation environment evaluation and heat transfer equation, Theoretical Calculation is obtained
Temperature Distribution and radiant heat flux situation to target under given measuring condition；
(2.4) based on each target temperature field data for solving acquisition, in calculating output experimental situation, target sets ripple in thermal imaging system
Infrared characteristic distribution under section；
According to radiant heat flux transmission situation in the Temperature Distribution and simulator of target, target is calculated along test equipment observed direction
Effective radiation；
Net long wave radiation includes the heat radiation of target itself and the background radiation of reflection；
Step 3：Computation model and result of calculation reliability demonstration
The result of the test of contrast step 1 calculates mould with radiant heat flux transmission situation in simulator in the result of calculation of step 2, checking
The correctness of type and design conditions：
As the error ＜ 10% of the result of calculation of the result of the test and step 2 of step 1, confirm that computation model meets and require, it is empty
Between environment simulator simulation heat radiation environment it is consistent in the heat radiation environment of real space environment with target；
When error >=10% of the result of calculation of result of the test and the step 2 of step 1, change computation model, until error it is little
In 10%；
Step 4：Calculate the influence value of stray radiation
In computation model, by addition or removing component, the impact that each part is radiated to target component is calculated respectively；
The reflectance of the other surfaces outside the measured target that solar irradiation simulator is irradiated to is set to 0 and actual value,
Calculate impact of the unnecessary solar radiation to target component radiation value；
Step 5：Stray radiation impact is deducted from test radiation value
The test radiation value of step 1 is deducted into the influence value that step 4 calculates gained, realizes that reducing stray radiation surveys to radiation characteristic
Amount affect effect, obtain target emanation amount closer to target real space environment radiation value.
2. the method that a kind of rejecting stray radiation as claimed in claim 1 is affected on infrared radiation characteristics simulation test, which is special
Levy and be：Space simulator is vacuum airtight container, and vacuum is less than 10-3The sun is set in pa, space simulator
Radiation simulator, terrestrial radiation simulator and low temperature are heat sink, respectively the deep space background of solar simulating radiation, terrestrial radiation and 4K；
Radiation-measurment equipment is additionally provided with space simulator.
3. the method that a kind of rejecting stray radiation as claimed in claim 2 is affected on infrared radiation characteristics simulation test, which is special
Levy and be：A diameter of 3m of vacuum airtight container, material are rustless steel, and the temperature remains within the normal range for temperature；The irradiation of solar irradiation simulator
A diameter of 1m, output illumination are 1430W/m2；A diameter of 2.5m of earth irradiation simulator, temperature keep 300K, surface emitting
Rate is 0.95；The material that low temperature is heat sink be copper, temperature keep 85K, emissivity is 0.95；The initial temperature of measured target is
300K。
4. the method that a kind of rejecting stray radiation as claimed in claim 3 is affected on infrared radiation characteristics simulation test, which is special
Levy and be：In step (1.2), infrared radiation measurement equipment is thermal imaging system, and waveband selection is medium wave, the one kind in long wave.
5. the method that a kind of rejecting stray radiation as claimed in claim 4 is affected on infrared radiation characteristics simulation test, which is special
Levy and be：In step (2.1), in extraterrestrial target radiation characteristic injection ground simulation test system, the 3-D geometric model of each target leads to
One or more foundation crossed in following modeling tool：UG、ProE、Solidworks.
6. the method that a kind of rejecting stray radiation as claimed in claim 1 is affected on infrared radiation characteristics simulation test, which is special
Levy and be：In step 3, by adjusting the size of grid in three-dimensional computations grid data, examining boundary condition, Adjustable calculation model
Computation model is changed with the similarity of practical situation.
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| CN111487283A (en) * | 2020-06-29 | 2020-08-04 | 宁波瑞凌新能源科技有限公司 | Radiation refrigeration power measuring device and system |
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