CN202975310U - Tri-polarized microwave radiometer calibrating device under vacuum environment - Google Patents
Tri-polarized microwave radiometer calibrating device under vacuum environment Download PDFInfo
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- CN202975310U CN202975310U CN 201220695886 CN201220695886U CN202975310U CN 202975310 U CN202975310 U CN 202975310U CN 201220695886 CN201220695886 CN 201220695886 CN 201220695886 U CN201220695886 U CN 201220695886U CN 202975310 U CN202975310 U CN 202975310U
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Abstract
The utility model discloses a tri-polarized microwave radiometer calibrating device under a vacuum environment. The device comprises a polarization generator (1), a stainless steel shielding barrel (2), a stainless steel fixed plate A (3), a fixed temperature point reference load (4), a stainless steel fixed plate B (6), a heat-insulating supporting plate (7), a bottom plate (8), a turntable (9), temperature sensors (10), a variable temperature point reference load (5), liquid nitrogen pipes (11) and resistance heating rods (12), wherein the polarization generator (1) comprises a stainless steel frame and a metal line. The variable temperature point reference load (5) and the fixed temperature point reference load (4) are used for substituting for an original scheme using three fixed temperature point reference loads, so that the structure of the calibrating device is simplified, used space is saved, and the tri-polarized microwave radiometer calibrating device under the vacuum environment is more suitable for calibration of a tri-polarized microwave radiometer under the vacuum environment.
Description
Technical field
The utility model relates to a kind of three polarization microwave radiometer calibrating installations of three polarization microwave radiometer calibrating installations, particularly a kind of vacuum environment.
Background technology
The polarization microwave radiometer has been applied to the passive microwave remote sensing field gradually since the nineties in last century, it further extracts the polarization information of observed object on the basis that traditional microwave radiometer power magnitude is measured.Namely except two orthogonally polarized components of measurement target microwave thermal electromagnetic radiance, can also measure the real part of the multiple correlation component of these two quadrature components
T 3Three polarized radiation meters (are measured
T v,
T h,
T 3The radiometer of these three stokes components) practical proof of the remarkable effect aspect the wind field of remote sensing ocean.
In the world, the microwave radiometer of nearly all service application type Seeds of First Post-flight all will be calibrated before emission.The laboratory calibration is basic, the most most economical calibrating mode; Ground vacuum environment calibration is the highest a kind of calibrating mode of precision.Gasiewski and Kunkee have designed a kind of calibrating installation that can calibrate three polarization microwave radiometers, and this device comprises that mainly cold reference load, physochlaina infudibularis are examined load and the generator that polarizes.But the problem that the devices that the people proposes such as Gasiewski exist is also to need to use the non-polarized reference load of another one, i.e. the 3rd reference load.In the calibration radiation timing, or temporarily remove the polarization generator, or mobile radiometer points to the 3rd reference load except cold reference load and physochlaina infudibularis are examined load, could realize three calibrations that polarize microwave radiometers.
The device that Gasiewski and Kunkee propose can be realized the laboratory calibration of three polarization microwave radiometers.But for the calibration of ground vacuum environment, exist larger Project Realization difficulty on the Gasiewski scheme.Because when the vacuum correction of ground, there is larger difficulty in mobile polarization generator in vacuum tank, in case mechanical fault occurs, can only termination test, and the polarization generator probably faces transportable restriction nowhere.In this external vacuum tank, because the space is relatively narrow and small, allow radiometer complete in the antenna axial direction rotation, also will mobile radiometer point to the also more difficult realization of another reference load except cold reference load and physochlaina infudibularis are examined load.
The scheme that the people such as Gasiewski propose and the difference of the core of this device are that the Gasiewski scheme does not comprise variable temperature point reference load.The Gasiewski scheme has been used two fixed temperature point reference load, and instant heating reference load and cold reference load are placed on respectively on the position of this device fixed temperature point reference load and variable temperature point reference load.In order to realize calibrating the brightness temperature vector signal output of the required linear independence of three polarized radiation meters, this scheme need in the radiometer calbration process, the 3rd fixed temperature point reference load repeatedly be moved to the generator that polarizes above.
The utility model content
The utility model purpose is to provide a kind of three polarization microwave radiometer calibrating installations of vacuum environment, solves calibrating installation in the past and need to remove the polarization generator and introduce the 3rd reference load and the problem of the structure complicated that causes.
A kind of three polarization microwave radiometer calibrating installations of vacuum environment, comprise: polarization generator, stainless steel shielding bucket, stainless steel fixed plate A, fixed temperature point reference load, stainless steel fixed head B, adiabatic back up pad, base plate, turntable and temperature sensor also comprise: variable temperature point reference load, liquid nitrogen pipe and resistance heated rod.Wherein, the polarization generator comprises: stainless steel framework and metal wire.
Stainless steel framework is rectangular configuration, is equipped with one group of equally spaced parallel lines metal wire on metal frame.The spacing of metal wire is less than 5% of operation wavelength, and wire diameter is less than 20% of metal wire separation.Polarization generator one end and a stainless steel shielding barrel upper end screw are fixed, and the polarization generator other end and stainless steel fixed head B screw are fixed, and stainless steel fixed head B and adiabatic back up pad screw are fixed.The horizontal plane angle of polarization generator and variable temperature point reference load is 45 degree.Stainless steel shielding bucket is a square circle type structure, and its lower end and base screw are fixed, and the height of stainless steel shielding bucket is greater than the fixed temperature point reference load length of side.
Stainless steel fixed plate A and base screw are fixed, and fixed temperature point reference load and stainless steel fixed plate A screw are fixed.
It is inner that liquid nitrogen pipe, temperature sensor are placed in fixed temperature point reference load, and it is inner that liquid nitrogen pipe evenly embeds fixed temperature point reference load, temperature sensor embedding fixed temperature point reference load tip.
Variable temperature point reference load level is placed on adiabatic back up pad, and variable temperature point reference load and adiabatic back up pad screw are fixed, and variable temperature point reference load and fixed temperature point reference load are vertical relation.Liquid nitrogen pipe, resistance heated rod, temperature sensor are placed in variable temperature point reference load inside.It is inner that liquid nitrogen pipe, resistance heated rod evenly embeds variable temperature point reference load, temperature sensor embedding variable temperature point reference load tip.
Adiabatic back up pad is placed between variable temperature point reference load and base plate, and adiabatic back up pad and bottom plate screw are fixed
,Be used for the heat conduction heat exchange between blocking-up variable temperature point reference load and base.Base plate and turntable screw are fixed.
During work, the fixed temperature point reference load of liquid nitrogen refrigerating provides the reference signal of the fixedly brightness temperature between a 80K～90K.Variable temperature point reference load utilizes liquid nitrogen as the refrigeration medium, and the resistance heated rod provides the bright temperature signal output of standard that temperature spot is adjustable as heating arrangement.The physical temperature of load inside is by temperature sensor monitors.Turntable is positioned at the bottommost of calibrating installation, utilize turntable to change calibrating installation with respect to by the angle of school antenna for radiometer polarised direction, and the physical temperature of change variable temperature point reference load, like this from fixed temperature point reference load and the signal that upwards produces after reflection through the polarization generator, with upwards the signal of transmission is combined from variable temperature point reference load and transmission hyperpolarization generator, provide the standard brightness temperature signal for calibration three polarized radiation meters, the calibrating signal transmission direction is variable temperature reference load normal direction.Radiation heat transfer in stainless steel shielding bucket minimizing vacuum tank between background environment and fixed temperature point reference load and variable temperature point reference load is for the surface temperature homogeneity that improves fixed temperature point reference load and variable temperature point reference load.
This device is with a variable temperature point reference load and a fixed temperature point reference load, substituted the scheme of three fixed temperature point reference load of original use, simplify the calibrating installation structure, be more suitable for three polarized radiation meter calibratings under vacuum environment thereby saved usage space.This device uses variable temperature point reference load to replace in the Gasiewski scheme in two fixed temperature point reference load one, put the liquid nitrogen pipe of reference load inside and the physical temperature that electric resistance heater changes reference load by variable temperature, and then the output brightness temperature of change reference load, can produce the calibrating signal combination identical with Gasiewski scheme effect.
Description of drawings
The schematic diagram of three polarization microwave radiometer calibrating installations of a kind of vacuum environment of Fig. 1;
The polarization generator schematic diagram of three polarization microwave radiometer calibrating installations of a kind of vacuum environment of Fig. 2.
1. polarization generator 2. stainless steels shield bucket 3. stainless steel fixed plate A 4. fixed temperature point reference load
5. variable temperature point reference load 6. adiabatic back up pad 8. base plate 9. turntables of stainless steel fixed head B 7.
10. temperature sensor 11. liquid nitrogen pipe 12. resistance heated rods 13. stainless steel framework 14. metal wires.
Embodiment
A kind of three polarization microwave radiometer calibrating installations of vacuum environment, comprise: polarization generator 1, stainless steel shielding bucket 2, stainless steel fixed plate A 3, fixed temperature point reference load 4, stainless steel fixed head B6, adiabatic back up pad 7, base plate 8, turntable 9 and temperature sensor 10 also comprise: variable temperature point reference load 5, liquid nitrogen pipe 11 and resistance heated rod 12.Wherein, polarization generator 1 comprises: stainless steel framework 13 and metal wire 14.
Stainless steel framework 13 is rectangular configuration, is equipped with one group of equally spaced parallel lines metal wire 14 on metal frame.The spacing of metal wire 14 is less than 5% of operation wavelength, and metal wire 14 diameters are less than 20% of metal wire 14 spacings.Polarization generator 1 one ends and stainless steel shielding bucket 2 upper end screws are fixed, and polarization generator 1 other end and stainless steel fixed head B6 screw are fixed, and stainless steel fixed head B6 and adiabatic back up pad 7 screws are fixed.Polarization generator 1 is 45 degree with the horizontal plane angle of variable temperature point reference load 5.Stainless steel shielding bucket 2 is a square circle type structure, and its lower end and base screw are fixed, and the height of stainless steel shielding bucket 2 is greater than fixed temperature point reference load 4 length of sides.
Stainless steel fixed plate A 3 is fixed with base screw, and fixed temperature point reference load 4 is fixed with stainless steel fixed plate A 3 screws.
Variable temperature point reference load 5 levels are placed on adiabatic back up pad 7, and variable temperature point reference load 5 is fixed with adiabatic back up pad 7 screws, and variable temperature point reference load 5 is vertical relation with fixed temperature point reference load 4.Liquid nitrogen pipe 11, resistance heated rod 12, temperature sensor 10 are placed in variable temperature point reference load 5 inside.Liquid nitrogen pipe 11, resistance heated rod 12 evenly embeds variable temperature point reference load 5 inside, temperature sensor 10 embedding variable temperature point reference load 5 tips.
Adiabatic back up pad 7 is placed between variable temperature point reference load 5 and base plate 8, and adiabatic back up pad 7 is fixed with base plate 8 screws
,Be used for the heat conduction heat exchange between blocking-up variable temperature point reference load 5 and base.Base plate 8 is fixed with turntable 9 screws.
During work, the fixed temperature point reference load 4 of liquid nitrogen refrigerating provides the reference signal of the fixedly brightness temperature between a 80K～90K.Variable temperature point reference load 5 utilizes liquid nitrogen as the refrigeration medium, and resistance heated rod 12 provides the bright temperature signal output of standard that temperature spot is adjustable as heating arrangement.The physical temperature of load inside is by temperature sensor 10 monitorings.Turntable 9 is positioned at the bottommost of calibrating installation, utilize turntable 9 to change calibrating installations with respect to by the angle of school antenna for radiometer polarised direction, and the physical temperature of change variable temperature point reference load 5, like this from fixed temperature point reference load 4 and the signal that upwards produces after reflection through polarization generator 1, with upwards the signal of transmission is combined from variable temperature point reference load 5 and transmission hyperpolarization generator 1, provide the standard brightness temperature signal for calibration three polarized radiation meters, the calibrating signal transmission direction is variable temperature reference load normal direction.Stainless steel shielding bucket 2 reduces the radiation heat transfer between the interior background environment of vacuum tank and fixed temperature point reference load 4 and variable temperature point reference load 5, is used for improving the surface temperature homogeneity of fixed temperature point reference load 4 and variable temperature point reference load 5.
Claims (1)
1. three of vacuum environment polarization microwave radiometer calibrating installations, comprise: polarization generator (1), stainless steel shielding bucket (2), a stainless steel fixed plate A (3), fixed temperature point reference load (4), stainless steel fixed head B(6), adiabatic back up pad (7), base plate (8), turntable (9) and temperature sensor (10), characterized by further comprising: variable temperature point reference load (5), liquid nitrogen pipe (11) and resistance heated excellent (12); Wherein, polarization generator (1) comprising: stainless steel framework (13) and metal wire (14);
Stainless steel framework (13) is rectangular configuration, is equipped with one group of equally spaced parallel lines metal wire (14) on metal frame; The spacing of metal wire (14) is less than 5% of operation wavelength, and metal wire (14) diameter is less than 20% of metal wire (14) spacing; Polarization generator (1) one end and stainless steel shielding bucket (2) upper end screw is fixed, polarization generator (1) other end and stainless steel fixed head B(6) screw fixes, stainless steel fixed head B(6) and adiabatic back up pad (7) screw fix; Polarization generator (1) is 45 degree with the horizontal plane angle of variable temperature point reference load (5); Stainless steel shielding bucket (2) is a square circle type structure, and its lower end and base screw are fixed, and the height of stainless steel shielding bucket (2) is put reference load (4) length of side greater than fixed temperature;
Stainless steel fixed plate A (3) is fixed with base screw, and fixed temperature point reference load (4) is fixed with stainless steel fixed plate A (3) screw;
Liquid nitrogen pipe (11), temperature sensor (10) are placed in fixed temperature point reference load (4) inside, and liquid nitrogen pipe (11) evenly embeds fixed temperature point reference load (4) inside, and temperature sensor (10) embeds fixed temperature point reference load (4) tip;
Variable temperature point reference load (5) level is placed on adiabatic back up pad (7), and variable temperature point reference load (5) is fixed with adiabatic back up pad (7) screw, and variable temperature point reference load (5) is vertical relation with fixed temperature point reference load (4); Liquid nitrogen pipe (11), resistance heated rod (12), temperature sensor (10) are placed in variable temperature point reference load (5) inside; Liquid nitrogen pipe (11), resistance heated rod (12) evenly embeds variable temperature point reference load (5) inside, temperature sensor (10) embedding variable temperature point reference load (5) tip;
Adiabatic back up pad (7) is placed between variable temperature point reference load (5) and base plate (8), and adiabatic back up pad (7) is fixed with base plate (8) screw
,Be used for the heat conduction heat exchange between blocking-up variable temperature point reference load (5) and base; Base plate (8) is fixed with turntable (9) screw;
during work, the fixed temperature point reference load (4) of liquid nitrogen refrigerating provides the reference signal of the fixedly brightness temperature between a 80K～90K, variable temperature point reference load (5) utilizes liquid nitrogen as the refrigeration medium, and resistance heated rod (12) provides the bright temperature signal output of standard that temperature spot is adjustable as heating arrangement, the physical temperature of load inside is monitored by temperature sensor (10), turntable (9) is positioned at the bottommost of calibrating installation, utilize turntable (9) to change calibrating installation with respect to by the angle of school antenna for radiometer polarised direction, and the physical temperature of change variable temperature point reference load (5), like this from fixed temperature point reference load (4) and through polarization generator (1) signal of generation after reflection upwards, with upwards the signal of transmission is combined from variable temperature point reference load (5) and transmission hyperpolarization generator (1), provide the standard brightness temperature signal for calibration three polarized radiation meters, the calibrating signal transmission direction is variable temperature reference load normal direction, stainless steel shielding bucket (2) reduces the radiation heat transfer between the interior background environment of vacuum tank and fixed temperature point reference load (4) and variable temperature point reference load (5), is used for improving the surface temperature homogeneity of fixed temperature point reference load (4) and variable temperature point reference load (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220695886 CN202975310U (en) | 2012-12-17 | 2012-12-17 | Tri-polarized microwave radiometer calibrating device under vacuum environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220695886 CN202975310U (en) | 2012-12-17 | 2012-12-17 | Tri-polarized microwave radiometer calibrating device under vacuum environment |
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| CN202975310U true CN202975310U (en) | 2013-06-05 |
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| CN 201220695886 Expired - Fee Related CN202975310U (en) | 2012-12-17 | 2012-12-17 | Tri-polarized microwave radiometer calibrating device under vacuum environment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110231516A (en) * | 2019-06-14 | 2019-09-13 | 北京无线电计量测试研究所 | A kind of quick temperature-changeable microwave noise source |
-
2012
- 2012-12-17 CN CN 201220695886 patent/CN202975310U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110231516A (en) * | 2019-06-14 | 2019-09-13 | 北京无线电计量测试研究所 | A kind of quick temperature-changeable microwave noise source |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20141217 |
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| EXPY | Termination of patent right or utility model |