CN105659831B - High precision heat shield isothermal heat flow meter - Google Patents
High precision heat shield isothermal heat flow meterInfo
- Publication number
- CN105659831B CN105659831B CN200610056219.9A CN200610056219A CN105659831B CN 105659831 B CN105659831 B CN 105659831B CN 200610056219 A CN200610056219 A CN 200610056219A CN 105659831 B CN105659831 B CN 105659831B
- Authority
- CN
- China
- Prior art keywords
- heat
- heat shielding
- sensitive area
- flow meter
- shielding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 239000000758 substrate Substances 0.000 claims description 6
- 239000004411 aluminium Substances 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims description 5
- 229920001721 polyimide Polymers 0.000 claims description 5
- 239000004642 Polyimide Substances 0.000 claims description 3
- 230000001815 facial effect Effects 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 2
- 239000004809 Teflon Substances 0.000 claims 1
- 229920006362 Teflon® Polymers 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract description 13
- 238000005259 measurement Methods 0.000 abstract description 11
- 239000012530 fluid Substances 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 abstract description 5
- 229910001006 Constantan Inorganic materials 0.000 description 7
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 229920002379 silicone rubber Polymers 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000011481 absorbance measurement Methods 0.000 description 1
- 238000005269 aluminizing Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Abstract
In a kind of spacecraft heat balance test, measure the isothermal heat-flow meter of high accuracy heat shielding of spacecraft little infrared heat flow that outer surface absorbs. The present invention adopts thermal resistance to do temp-controlling element raising heat shielding temperature-controlled precision; Utilize low heat conductivity support bar connection sensitive area and heat shielding, make thermal resistance between the two larger; Background electric heater is set, stable background hot-fluid is provided, make within heat-flow meter is operated in the range that hot-fluid calibrated error is less. By the improvement of this three aspect, make the certainty of measurement of absorption type heat flowmeter that 2% can be better than.<pb pnum="1" />
Description
Technical field
The present invention relates to a kind of spacecraft heat balance test heat-flow measurement equipment, particularly spacecraft appearanceThe measurement device of little infrared heat flow that face absorbs.
Background technology
In spacecraft heat balance test, infrared heat flow simulation is the normal a kind of space heat flux simulation adoptingMethod. Determine that a key factor of infrared heat flow simulation precision is the measurement essence of infra-red radiation heat-flow meterDegree. Existing infra-red radiation heat-flow meter has black-film formula heat-flow meter and absorption type heat flowmeter two class. Black-film formula heatThe certainty of measurement of flowmeter is subject to the impact of infrared radiation source temperature and spacecraft surface temperature larger. When the hot-fluid of measuringDensity is compared with little and satellite surface temperature is higher right, and the measure error of black-film formula heat-flow meter clearly.
Absorption type heat flowmeter uses more. Paper " the infrared simulation development of absorption type heat flowmeter " (" ringMould technology " the 4th phase in 1991) in describe a kind of absorption type heat flowmeter, this heat-flow meter comprises heat shieldingWith sensitive area two parts. Sensitive area front is and the identical coating of satellite surface, and the back side is installed and demarcatedHeater. Heat shielding is cup-shaped, and the sensitive area back side and side are surrounded completely, sensitive area corner silicon rubberBe fixed in heat shielding. Temp controlling heater is installed in heat shielding bottom. Sensitive area fills a pair of copper-constantan thermocouple,Heat shielding fills two pairs of similar thermocouples, wherein a pair of and heat shielding temp controlling heater one is used from and controls heat shielding temperatureDegree, another is to then for measuring heat shielding temperature. Although this heat-flow meter avoids sensitive area ir-absorbanceMeasurement and value error, but its weak point is: (1) with thermocouple as temperature-control senser,Easily be subject to the interference of electronic equipment in electronic equipment on heat balance test Air China sky device and pilot system, leadCause screen temperature unstable, heat-flow measurement precise decreasing. (2) sensitive area and heat shielding directly overlap, the two itContact thermal resistance is large not, makes the easy heating screen impact of sensitive area temperature. These 2 deficiencies have impact on this kind of heatThe certainty of measurement of flowmeter is especially still larger at the little heat flow density time error of measurement. Be 20W/m at hot-fluid2Time, error can reach more than 50.
Summary of the invention
Technology of the present invention is dealt with problems and is: the deficiency that overcomes existing absorption type heat flowmeter, provides a kind of highThe absorption type heat flowmeter of precision. The heat shielding temperature of this absorption type heat flowmeter is more stable, sensitive area and heat shielding itBetween thermal resistance larger, certainty of measurement to low heat flow density effectively can be improved.
Technical solution of the present invention is: the isothermal heat-flow meter of high accuracy heat shielding comprises sensitive area and heat shieldingTwo parts, sensitive area face-coating is and the identical coating in spacecraft surface, and background electricity is installed at the back sideHeater. Heat shielding is cup-shaped, and make with highly heat-conductive material, screen inner surface is pasted thermal isolation film, screen outer surfaceTemp controlling heater is installed in bottom. Sensitive area is contained in heat shielding by the support bar of four low thermal conductivities, quickThe outer surface in sense face is concordant with heat shielding end face. The sensitive area back side and side surround by heat shielding completely. Heat shielding andSensitive area fills respectively a pair of copper constantan temperature thermocouple, for measuring the temperature of heat shielding and sensitive area.A temperature control thermal resistance is installed in the bottom of heat shielding, and thermal resistance adopts three-wire system.
Principle of the present invention is: the error of absorption type heat flowmeter depends primarily on the temperature stabilization journey of heat shieldingThermal resistance size between degree, heat shielding and sensitive area. Heat shielding temperature is more stable, between heat shielding and sensitive areaThermal resistance is larger, and the precision of absorption type heat flowmeter is just higher. Error main source when measuring little heat flow densityIn the calibrated error of heat-flow meter. Calibrated error reduces with the increase of heat flow density. Adopt three-wire system resistanceAs temperature-control senser, antijamming capability is stronger than thermocouple, can at complicated satellite and testing equipment electricityIn magnetic environment, the control signal of stable output is given screen temperature controller, and the ability that makes heat shielding maintain constant temperature is able toStrengthen. Between sensitive area and heat shielding, be connected then increase contact heat therebetween by low heat conductivity support barResistance, causes heat shielding to reduce to the heat transfer of sensitive area. Background electric heater for sensitive area provide one constantBackground hot-fluid, makes within absorption type heat flowmeter can be operated in the range that calibrated error is relatively little. OnThe improvement of stating three aspects has increased substantially the certainty of measurement of absorption type heat flowmeter.
The present invention's advantage is compared with prior art: the present invention does temperature control unit owing to have employed thermal resistancePart, significantly improve heat shielding temperature-controlled precision, and the ability that heat shielding maintains constant temperature is stronger; Employing low heat conductivity props upStrut connection sensitive area and heat shielding, make thermal resistance between the two larger, heat shielding reduces to the heat transfer of sensitive area;By increasing background electric heater, provide stable background hot-fluid, make heat-flow meter be operated in one and demarcate mistakeWithin poor less range. By the improvement of above three aspects, the certainty of measurement of this absorption type heat flowmeter2% can be better than.
Accompanying drawing explanation
Fig. 1 is the profile of the isothermal heat-flow meter of high accuracy heat shielding of the present invention;
Fig. 2 is heat-flow meter sensitive area figure of the present invention;
Fig. 3 is heat-flow meter heat shielding profile of the present invention.
Detailed description of the invention
As shown in Figure 1, sensitive area 1 is arranged on the middle part of heat shielding 3 by the support bar 2 of 4 low heat conductivities,The outer surface of sensitive area is concordant with heat shielding end face; Gap one deck between sensitive area and heat shielding end face is two-sidedThe polyimide film 4 of aluminizing seals; Heat shielding base plate is installed 3 polyimides bearings 5.
As shown in Figure 2, sensitive area 1 is by coating 11, substrate 12, background electric heater 13 and thermometric warmGalvanic couple 14 forms. Coating 11 is spacecraft coating for surfaces; Substrate 12 is aluminium sheets; Background electric heater13 is Kapton type constantan paper tinsel heating plates; Temperature thermocouple 14 is a pair of copper-constantan thermocouples.In the spraying of substrate 12 front or stickup coating, then temperature thermocouple 14 is embedded in substrate back milling in advanceIn the narrow groove that goes out, fixing head, fills and leads up narrow groove with silicon rubber, and background electric heater 13 is sticky with silicon rubberBe attached on substrate.
As shown in Figure 3, heat shielding 3 is by thermal isolation film 31, aluminium cup 32, temperature control electric heater 33, temperature control platinum electricityResistance 34 and temperature thermocouple 35, appearance facial mask 36 and base plate 37 form. Thermal isolation film 31 is gold-plated polyesterFilm, with silicon rubber or pressure sensitive adhesive tape stickup; Temperature control electric heater 33 is that Kapton type constantan paper tinsel addsBacking, pastes on aluminium cup bottom outer surface with silicon rubber; Temperature control RTD 34 is three-wire system, thermometric heatGalvanic couple 35 is a pair of copper-constantan thermocouples, and both is all embedded in and mills out in advance on aluminium cup bottom interior surfaceIn narrow groove, stationary heat galvanic couple and RTD head, then fill and lead up narrow groove with silicon rubber. Appearance facial mask 36Be polyimide film, paste with pressure sensitive adhesive tape. Base plate 37 is fiberglass thin plate, is attached to constantan with silicon rubberOutside paper tinsel heating plate.
Wherein, low heat conductivity support bar 2 can be polyimides sleeve pipe, also can be polytetrafluoroethylene (PTFE) coverPipe. Three-wire system RTD 34 is standard platinum resistances.
Claims (3)
1. the isothermal heat-flow meter of high accuracy heat shielding, comprises (3) two of sensitive area (1) and heat shieldingsPoint, it is characterized in that: sensitive area (1) is by coating (11), substrate (12), background electric heaterAnd temperature thermocouple (14) composition (13); The coating (11) in sensitive area (1) front is and space flightThe identical coating in device surface, background electric heater (13) and temperature thermocouple (14) are installed in the back side;Heat shielding (3) by thermal isolation film (31), aluminium cup (32), temperature control electric heater (33), RTD (34),Temperature thermocouple (35), appearance facial mask (36) and base plate (37) composition; Heat shielding (3) is cupShape, makes with highly heat-conductive material; Heat shielding (3) inner surface is pasted thermal isolation film (31) and thermometric heat is installedGalvanic couple (35), temp controlling heater (33), RTD (34) are installed in heat shielding (3) outer surface bottomBe arranged on the bottom of heat shielding (3); Sensitive area (1) is by four low thermal conductivity support bars (2) dressIn heat shielding (3), the outer surface of sensitive area (1) is concordant with heat shielding (3) end face, heat shielding (3)Sensitive area (1) back side and side are surrounded completely.
2. the isothermal heat-flow meter of high accuracy heat shielding according to claim 1, is characterized in that: instituteState RTD (34) and adopt three-wire system.
3. the isothermal heat-flow meter of high accuracy heat shielding according to claim 1, is characterized in that: low leadingHeating rate support bar (2) is polyimides sleeve pipe or teflon sleeve.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105659831B true CN105659831B (en) | 2009-04-29 |
Family
ID=
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Kulacki et al. | Natural convection in a horizontal fluid layer with volumetric energy sources | |
| CN101290299B (en) | Variable thermal conductivity factor measuring apparatus and method | |
| CN109001252A (en) | Test device of thermal conductivity coefficient | |
| CN205656518U (en) | Constant temperature control system | |
| CN111024269B (en) | A planar heat flow sensor for measuring heat flow along a wall and its calibration method | |
| Keltner | Heat flux measurements: theory and applications | |
| CN102090884B (en) | Cavity device of blackbody radiation source | |
| CN107329507A (en) | A kind of thermostatic control system | |
| CN105784765A (en) | Powder material heat insulation effect evaluation device and application method thereof | |
| CN105659831B (en) | High precision heat shield isothermal heat flow meter | |
| Sima et al. | Accurate numerical model for characteristic temperature acquisition of miniature fixed-point blackbodies | |
| Holmberg et al. | Performance and modeling of heat flux sensors in different environments | |
| CN114609177B (en) | Application method of thermoelectric generator in thermal flow parameter measurement equipment | |
| US1977340A (en) | Heat convection meter | |
| Assaad et al. | Thin-film heat flux sensor for measuring the film coefficient of rubber components of a rolling tire | |
| CN208505485U (en) | A kind of surface temperature measurement instrument | |
| Stepanić et al. | An in situ temperature calibration of a guarded hot plate apparatus | |
| Diller et al. | Heat flux measurement | |
| CN112067119A (en) | Thermal compensation method based on terahertz power measurement | |
| KR101152839B1 (en) | Layered type micro heat flux sensor | |
| Hoffie | Convection calibration of schmidt-boelter heat flux gages in shear and stagnation air flow | |
| JPS61288133A (en) | Measuring instrument for radiation heating value | |
| JPS5923369B2 (en) | Zero-level heat flow meter | |
| Hubble et al. | Development and evaluation of the time-resolved heat and temperature array | |
| CN216209930U (en) | Temperature control device for radiation processing grade quasi-adiabatic electron beam graphite calorimeter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| DC01 | Secret patent status has been lifted | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090429 Termination date: 20180626 |