CN102455720A - Temperature control system for vacuum low-temperature black body - Google Patents
Temperature control system for vacuum low-temperature black body Download PDFInfo
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- CN102455720A CN102455720A CN2010105230603A CN201010523060A CN102455720A CN 102455720 A CN102455720 A CN 102455720A CN 2010105230603 A CN2010105230603 A CN 2010105230603A CN 201010523060 A CN201010523060 A CN 201010523060A CN 102455720 A CN102455720 A CN 102455720A
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Abstract
The invention discloses a temperature control system for a vacuum low-temperature black body. The temperature control system comprises a structure of the system, constituents of the system, a principle of the system, and a temperature control algorithm used by the system. The black body, which works under vacuum low-temperature environment, is a standard radiation source calibrated by infrared radiation of a satellite remote sensor. The temperature control system for the black body is a control system which is non-linear, provided with large time delay, and is difficult to build by a mathematical model. At the heating-up initial stage, different fuzzy control algorithms are used for a black body cavity and a protective cavity; at the heating-up rear stage, heating for the black body cavity is stopped, an intelligent PID (Proportion Integration Differentiation) control algorithm is only used for the protective cavity, so that stability for the black body is held by radiation heat exchange between two cavities. Fuzzy control rules are perfected by debugging atmosphere and vacuum low-temperature environment for many times. The temperature control system for the vacuum low-temperature black body, which is combined with a plurality of temperature control algorithms, serves to a certain type of radiation calibration test. In the test, the temperature control precision and stability for the system are high, so that the working state of the black body as a standard radiation source is ensured; simultaneously, the temperature control time for the system is short, thus the test period is shortened, and the test cost is reduced.
Description
Technical field
The invention belongs to the space environment simulation field, specifically, the present invention relates to the vacuum and low temperature black matrix temperature-controlling system that a kind of satellite remote sensor infrared radiation bracketing is used.
Background technology
The chamber type black matrix of temperature adjustment is the calibrated radiation source of satellite remote sensor infrared radiation calibration continuously, can be used for demarcating the space remote sensing instrument.Black matrix is operated under the vacuum low-temperature environment, and is adjustable continuously in 240K～360K temperature range, through the continuous variation of blackbody temperature, and the radiation of simulation earth different natural target warm area.In the radiation calibration test, not only require the arrival target temperature of black matrix rapid Continuous, and require black matrix to maintain target temperature long-term and stably.Vacuum and low temperature black matrix temperature-controlling system arises at the historic moment to this test demand.
Summary of the invention
The object of the present invention is to provide a kind of vacuum and low temperature black matrix temperature-controlling system, this system can control the point source black matrix and arrive target temperature fast, and stable maintenance is at target temperature.To achieve these goals, the present invention has adopted following technical scheme:
The vacuum and low temperature black matrix temperature-controlling system that a kind of satellite remote sensor infrared radiation bracketing is used comprises point source black matrix, sensor for measuring temperature, surveying instrument, gateway, programmable power supply, switch and TT&C software.Wherein point source black matrix and TT&C software are the key components of system.
The point source black matrix is made up of blackbody chamber and protection chamber, and blackbody chamber is the cylinder inner cone chamber of band awl mouth, and the protection chamber wraps in the blackbody chamber outside; Be vacuum between the two, blackbody chamber has same heat transfer structure with the protection chamber, opens helicla flute on the wall; The outside puts heating muff; The both ends of the surface welding forms the cooling fluid pipeline, and heating plate is installed on heating muff.
Platinum-resistance thermometer is placed on the inner cone bottom of blackbody chamber as sensor for measuring temperature, is that temperature balance is the most local here.Surveying instrument is regularly measured the temperature value in blackbody chamber and protection chamber according to the setting cycle of software through survey sensor.Surveying instrument has only gpib interface, for the computing machine easy communication, convert gpib interface into LAN interface through a gateway.
Two programmable power supplys link to each other with heating plate on the protection chamber with blackbody chamber respectively.Programmable power supply is according to the instruction adjustment electric current of temperature control software and the output of voltage, and the heating power of control heating plate reaches the purpose of controlling blackbody temperature.
Computing machine and programmable power supply carry out communication through LAN interface, for can be simultaneously and 2 programmable power supplys and 1 surveying instrument communication, system disposition switch.
When black matrix being carried out temperature control work, system divides 2 stages to carry out temperature control.
System the intensification initial stage in order to improve programming rate, 2 power supplys are respectively to blackbody chamber and the heating of protection chamber, and to blackbody chamber and the different FUZZY ALGORITHMS FOR CONTROL of protection chamber employing fuzzy rule.Because blackbody chamber heats up with the protection chamber simultaneously, has accelerated the programming rate of black matrix.
System is heating up the later stage; When the blackbody chamber temperature when a certain temperature controlling point, adjustment power supply 1 is output as 0, stops the heating to blackbody chamber; Only thermostatic control is carried out in the protection chamber; Through the radiation heat transfer between protection chamber and the blackbody chamber, keep the temperature stabilization of blackbody chamber, temperature control system is got into by the heating that heats up and keeps heating.
Keeping the heating period, in order to guarantee the stability of blackbody temperature, the temperature control algorithm in protection chamber 2 changes Intelligent PID Control into by fuzzy control, makes the protection cavity temperature satisfy control accuracy.And the stability of utilizing the temperature in protection chamber controls the temperature stability of blackbody chamber, reaches the purpose of improving the systematic steady state performance.
Description of drawings
Fig. 1 is a vacuum and low temperature black matrix structure.The structure of point source black matrix is the cylinder inner cone chamber of band awl mouth.
Fig. 2 is a vacuum and low temperature black matrix temperature-controlling system structural drawing.System is the closed loop temperature-controlling system that has 2 temperature control targets.
Fig. 3 is a vacuum and low temperature black matrix temperature control schematic diagram.System adopts different temperature control algorithms respectively to 2 temperature control targets.
Fig. 4 is the black matrix temperature control curve of intensification 10K.System reached stable in 40 minutes, stability reaches 0.1K/30min.
Fig. 5 is the black matrix temperature control curve of intensification 30K.System reached stable in 100 minutes, stability reaches 0.1K/60min.
Embodiment
Below in conjunction with accompanying drawing the present invention is elaborated.
With reference to Fig. 1, the black matrix geometry cavity adopts cylinder inner cone chamber, and this is to calculate the highest chamber shape of emissivity.In addition, black matrix is in the low temperature background environment, and near the thermal loss cavity hatch is a more serious problem, so added an awl mouth by way of compensation at opening part, has reduced near the thermal loss of opening.This blackbody chamber structure can effectively reduce the temperature non of cavity, improves the temperature stability of emission cavity.
With reference to Fig. 2 and Fig. 3, the temperature-rise period incipient stage, in order to improve programming rate, 2 power supplys are respectively to blackbody chamber and the heating of protection chamber.System adopts different fuzzy rules to carry out fuzzy control to blackbody chamber respectively with the protection chamber, according to the output of blackbody chamber with the temperature deviation of protecting the chamber, temperature deviation rate of change, these parameter adjustment power supplys of heating power, is heated up simultaneously in blackbody chamber and protection chamber.Wherein fuzzy rule is through repeatedly atmosphere and vacuum low-temperature environment descend the data summary of debugging to draw.
Heating up the later stage; When the blackbody chamber temperature when a certain temperature controlling point; According to heating power, temperature deviation, these parameters of temperature deviation rate of change, the temperature control algorithm 1 adjustment power supply 1 of blackbody chamber is output as 0, and the blackbody chamber thermal source quits work; Have only the thermal source in protection chamber to play insulation effect, temperature control system is got into by the heating that heats up and keeps heating.
Keeping the heating period, in order to guarantee the stability of blackbody temperature, the temperature control algorithm in protection chamber 2 changes Intelligent PID Control into by fuzzy control.The pid parameter of confirming when calling debugging automatically according to target temperature; And according to on-site actual situations; Carry out fuzzy reasoning from the each side such as stability, response speed and stable state accuracy of system; On-line automatic adjustment pid parameter makes pid parameter in the fluctuation among a small circle up and down of fixed numerical value, makes the protection cavity temperature satisfy control accuracy.And then, make the blackbody chamber temperature steadily reach target temperature through the radiation heat transfer between protection chamber and the blackbody chamber, and utilize the stability of the temperature in protection chamber to control the temperature stability of blackbody chamber, reach the purpose of improving the systematic steady state performance.
With reference to Fig. 4, in the test of certain model infrared multispectral radiation calibration, will the heat up successive steps property temperature control of 10K of system, for all temperature controlling points, system all can reach stable in 40 minutes, and stability reaches 0.1K/30min.
With reference to Fig. 5, in the test of certain model infrared multispectral radiation calibration, will the heat up successive steps property temperature control of 30K of system, for all temperature controlling points, system all can reach stable in 100 minutes, and stability reaches 0.1K/60min.
Claims (6)
1. vacuum and low temperature black matrix temperature-controlling system comprises:
Point source black matrix, sensor, well heater, digital multimeter, programmable power supply, gateway, switch and TT&C software.Wherein point source black matrix and TT&C software are the key components of system.
The emission cavity structure of point source black matrix is vertebra chamber in the awl mouthful cylinder, and blackbody chamber wraps in temperature control layer (protection chamber) the inside, is vacuum between the two.Thermostatic mode adopts the electrically heated thermostatic mode of liquid nitrogen, leans on the heating and cooling of temperature control layer, blackbody chamber is reached and is stabilized in a certain temperature controlling point.
The algorithm that TT&C software adopts fuzzy control and Intelligent PID Control to combine carries out continuous temperature control to the blackbody chamber with radiation relation respectively with the protection chamber, and improves fuzzy control rule through atmosphere and vacuum and low temperature debugging.
2. vacuum and low temperature black matrix temperature-controlling system according to claim 1 is characterized in that, vertebra chamber in the awl mouth cylinder of point source black matrix can effectively reduce the temperature non of cavity, improves the temperature stability of emission cavity.
3. vacuum and low temperature black matrix temperature-controlling system according to claim 1 is characterized in that the test operation person only need import target temperature, and temperature control software can automatic control system reach target temperature, during without any need for manual operation.
4. vacuum and low temperature black matrix temperature-controlling system according to claim 1 is characterized in that, the temperature control process of black matrix is divided into the intensification heating and keeps 2 stages of heating.In the intensification heating process, blackbody chamber heats up with the protection chamber simultaneously, keeps in the heating process, has only the heating power supply work in protection chamber, through the radiation heat transfer between protection chamber and the blackbody chamber, utilizes the temperature stability in protection chamber, keeps the temperature stability of blackbody chamber.
5. vacuum and low temperature black matrix temperature-controlling system according to claim 4 is characterized in that black matrix is under vacuum low-temperature environment; The temperature control process does not produce overshoot; Temperature control speed is fast, and every rising 10K carries out temperature control work once, just can reach system stability fast in 40 minutes; Every rising 30K carries out temperature control work once, just can reach system stability fast in 100 minutes.And after system arrived and stablizes, stability was superior to 0.1K/60min.Can satisfy the technical indicator of temperature control time and these 2 relative contradictions of temperature-controlled precision simultaneously.
6. vacuum and low temperature black matrix temperature-controlling system according to claim 4 is characterized in that black matrix is under vacuum low-temperature environment; Need maintain a certain specified temp for a long time; System is in the temperature control process that reaches more than 24 hours, and system stability is good, and stability is superior to 0.3K/24h.
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| CN2010105230603A CN102455720A (en) | 2010-10-28 | 2010-10-28 | Temperature control system for vacuum low-temperature black body |
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| CN2010105230603A CN102455720A (en) | 2010-10-28 | 2010-10-28 | Temperature control system for vacuum low-temperature black body |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103677012A (en) * | 2013-11-28 | 2014-03-26 | 北京振兴计量测试研究所 | Fine partition control system for improving uniformity of vacuum surface source black bodies |
| CN104133201A (en) * | 2014-05-27 | 2014-11-05 | 北京空间机电研究所 | Onboard calibration device based on variable temperature blackbodies |
| CN109520623A (en) * | 2018-12-27 | 2019-03-26 | 北京航天长征飞行器研究所 | Online real-time radiation calibration device under vacuum low-temperature environment |
| CN111273711A (en) * | 2020-03-31 | 2020-06-12 | 成都飞机工业（集团）有限责任公司 | Large-caliber high-temperature infrared surface source black body device with double-zone temperature control |
| CN111678609A (en) * | 2020-06-11 | 2020-09-18 | 上海卫星装备研究所 | High-precision blackbody cavity and manufacturing method thereof |
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| CN2247858Y (en) * | 1995-10-10 | 1997-02-19 | 中国航空工业总公司第014中心 | Subminiature infrared blackbody source |
| US20080192797A1 (en) * | 2007-02-13 | 2008-08-14 | Industrial Technology Research Institute | Standard radiation source |
| CN201369836Y (en) * | 2009-01-15 | 2009-12-23 | 凯迈（洛阳）测控有限公司 | Point-source blackbody radiation source |
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| CN2247858Y (en) * | 1995-10-10 | 1997-02-19 | 中国航空工业总公司第014中心 | Subminiature infrared blackbody source |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103677012A (en) * | 2013-11-28 | 2014-03-26 | 北京振兴计量测试研究所 | Fine partition control system for improving uniformity of vacuum surface source black bodies |
| CN103677012B (en) * | 2013-11-28 | 2016-11-02 | 北京振兴计量测试研究所 | A kind of improve suction surface source black matrix uniformity finely divide control system |
| CN104133201A (en) * | 2014-05-27 | 2014-11-05 | 北京空间机电研究所 | Onboard calibration device based on variable temperature blackbodies |
| CN104133201B (en) * | 2014-05-27 | 2016-06-01 | 北京空间机电研究所 | A kind of onboard process device based on variable temperature black matrix |
| CN109520623A (en) * | 2018-12-27 | 2019-03-26 | 北京航天长征飞行器研究所 | Online real-time radiation calibration device under vacuum low-temperature environment |
| CN111273711A (en) * | 2020-03-31 | 2020-06-12 | 成都飞机工业（集团）有限责任公司 | Large-caliber high-temperature infrared surface source black body device with double-zone temperature control |
| CN111678609A (en) * | 2020-06-11 | 2020-09-18 | 上海卫星装备研究所 | High-precision blackbody cavity and manufacturing method thereof |
| CN111678609B (en) * | 2020-06-11 | 2023-06-13 | 上海卫星装备研究所 | High-precision black body cavity and manufacturing method thereof |
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Application publication date: 20120516 |