CN103576128A - Microwave imager ground vacuum calibration device and method - Google Patents
Microwave imager ground vacuum calibration device and method Download PDFInfo
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- CN103576128A CN103576128A CN201210276466.5A CN201210276466A CN103576128A CN 103576128 A CN103576128 A CN 103576128A CN 201210276466 A CN201210276466 A CN 201210276466A CN 103576128 A CN103576128 A CN 103576128A
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- temperature
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
Abstract
The invention discloses a microwave imager ground vacuum calibration device and method. The microwave imager ground vacuum calibration device comprises a vacuum calibration rotary table, a vacuum calibration temperature controller, a heat calibration source, a cold calibration source and a temperature varying calibration source, wherein the vacuum calibration temperature controller is installed on the vacuum calibration rotary table and is driven by the vacuum calibration rotary table to rotate, the heat calibration source, the cold calibration source and the temperature varying calibration source are arranged around the vacuum calibration rotary table, and radiated emission windows of the heat calibration source, the cold calibration source and the temperature varying calibration source and a radiated receiving window of the vacuum calibration temperature controller are equal in height. According to the microwave imager ground vacuum calibration device and method, the problem that a whole microwave imager can not be calibrated in a vacuum mode is solved, and FY-3A and FY-3B satellite on-track verification shows that data of ground vacuum calibration completely conform to the on-track application requirements. The microwave imager ground vacuum calibration device and method are simple in design and easy to implement, has the certain universality and can be widely applied to various satellite-borne microwave imager vacuum calibration systems.
Description
Technical field
The present invention relates to a kind of TRMMMi-crowave Imager ground vacuum robot scaling equipment and method.
Background technology
Can TRMMMi-crowave Imager obtain valuable detection information in orbit time, obtains the application of quantification and real business and use, and depends primarily on TRMMMi-crowave Imager and launch the calibration in-orbit after the accurate vacuum calibration in front ground and transmitting.
In order to realize the operational use of TRMMMi-crowave Imager precise calibration and TRMMMi-crowave Imager, TRMMMi-crowave Imager must be carried out the vacuum calibration under the various temperature of ground before transmitting.General microwave meter systems adopts the calibration of complete machine vacuum, but bulky TRMMMi-crowave Imager is limited to the conditions such as equipment and technology, cannot carry out the calibration of complete machine vacuum.
TRMMMi-crowave Imager vacuum experiment chamber calibration will draw the bright temperature of T(under TRMMMi-crowave Imager vacuum condition exactly)-V(output voltage) curve, obtain vacuum calibration precision, the linearity and the index such as the scaled correction factor in-orbit.After the complete expansion of TRMMMi-crowave Imager, bulky, cannot in general vacuum test tank, test.And high-performance, bigbore vacuum reference source also cannot realize.TRMMMi-crowave Imager antenna main reflector, hot mirror, cold empty catoptron etc. are all passive systems, and the error that their are introduced is constant at a certain temperature, can adopt completely from feed aperture, to determine calibration method and obtain T-V curve in vacuum experiment chamber.
Summary of the invention
The object of the invention is to propose a kind of TRMMMi-crowave Imager ground vacuum robot scaling equipment and method for the ground vacuum calibration of TRMMMi-crowave Imager, to solve prior art, cannot carry out to TRMMMi-crowave Imager the problem of complete machine ground vacuum calibration.
For addressing the above problem, the invention provides a kind of TRMMMi-crowave Imager ground vacuum robot scaling equipment, comprising: vacuum calibration turntable, the vacuum that is installed on described vacuum calibration turntable is calibrated temperature controller, and described vacuum calibration turntable drives vacuum calibration temperature controller to rotate; The hot reference source, cold reference source, the alternating temperature reference source that around described vacuum calibration turntable, arrange, the radiation receive window of the radiation-emitting window of described hot reference source, cold reference source, alternating temperature reference source and the measured piece of described TRMMMi-crowave Imager is contour.
Further, described measured piece is Electronic Assemblies cylinder.
The present invention also provides a kind of TRMMMi-crowave Imager ground vacuum calibrating method, comprises the following steps:
Step 1, the Electronic Assemblies cylinder of described TRMMMi-crowave Imager is installed on to described vacuum calibration temperature controller; Step 2, set the temperature of described vacuum calibration temperature controller; Step 3, by the radiation receive window of Electronic Assemblies cylinder respectively with the radiation-emitting window of described hot reference source, cold reference source, alternating temperature reference source over against, and the output voltage of recorded electronic assembled pot respectively; Step 4, described vacuum are calibrated the temperature-resistant of temperature controller, within the scope of the temperature change of predetermined alternating temperature reference source, change the temperature of alternating temperature reference source, repeating step three according to the temperature test point of predetermined alternating temperature reference source; Step 5, in the range of temperature of predetermined vacuum calibration temperature controller, the temperature test point by predetermined vacuum calibration temperature controller, regulates vacuum to calibrate the temperature of temperature controller, and repeats step 3 and step 4; Step 6, the data that obtain according to step 3 to step 5, draw the temperature-output voltage curve at each vacuum calibration temperature controller temperature.
Further, also comprise according to described temperature-output voltage curve negotiating and calculate and obtain vacuum calibration precision, the linearity and the scaled correction factor in-orbit.
Further, the range of temperature of described predetermined vacuum calibration temperature controller is-10～40 ℃, every 5～10 ℃, is a probe temperature point.
Further, predetermined alternating temperature reference source temperature change scope is 95～320K.
The present invention is by hot reference source, cold reference source, alternating temperature reference source, vacuum calibration turntable and vacuum calibration temperature controller, to TRMMMi-crowave Imager need vacuum calibration the main unit that comprises receiver system--Electronic Assemblies cylinder carries out vacuum calibration, solution cannot be carried out a difficult problem for complete machine vacuum calibration, and through FY-3A and B star, verify in-orbit, the data of ground vacuum calibration meet the requirement of application in-orbit completely.TRMMMi-crowave Imager Electronic Assemblies cylinder is arranged on to be surveyed in head rotating cylinder, for completing the basic task of TRMMMi-crowave Imager---and receiving the microwave of earth surface and atmosphere, form sensor information, is whole of the core of TRMMMi-crowave Imager.
The method, by receiver system is calibrated, has solved and cannot carry out at ground complete machine a difficult problem for vacuum calibration.Simplicity of design of the present invention, realizes easily, and has certain versatility, can be widely used in the vacuum scaling system of all kinds of spaceborne large-scale microwave radiometers ground.
Accompanying drawing explanation
Fig. 1 is the principle schematic of TRMMMi-crowave Imager provided by the present invention ground vacuum robot scaling equipment.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
The present invention utilizes TRMMMi-crowave Imager vacuum calibration test turntable to make TRMMMi-crowave Imager Electronic Assemblies cylinder simulated microwave imager duty rotation, and calibration sequential, the sampling number on each reference source and sampling time interval etc. are consistent with in orbit time all.
Fig. 1 is the principle schematic of TRMMMi-crowave Imager provided by the present invention ground vacuum robot scaling equipment.TRMMMi-crowave Imager provided by the invention ground vacuum robot scaling equipment, comprising: vacuum calibration turntable (not shown), and the vacuum that is installed on described vacuum calibration turntable is calibrated temperature controller 40, and described vacuum calibration turntable drives vacuum calibration temperature controller 40 to rotate; The hot reference source 20, cold reference source 30, the alternating temperature reference source 10 that around described vacuum calibration turntable, arrange, the radiation receive window of described hot reference source 20, cold reference source 30, the radiation-emitting window of alternating temperature reference source 10 and the measured piece 50 of described TRMMMi-crowave Imager is contour.
The Electronic Assemblies cylinder that described measured piece 50 is TRMMMi-crowave Imager, the output voltage of described Electronic Assemblies cylinder is exported by connected computer.Result and the principle of work of TRMMMi-crowave Imager are well known to those skilled in the art, are not described in detail in this.
Angle between described hot reference source 20, cold reference source 30, alternating temperature reference source 10 need to arrange according to calibration.Such as in one embodiment of the invention, described cold reference source 30 is 180 ° with the angle of alternating temperature reference source 10; Described hot reference source 20 is 70 ° with the angle of cold reference source 30; Angle between alternating temperature reference source 10 and described hot reference source 20 is 110 °.
TRMMMi-crowave Imager provided by the present invention ground vacuum calibrating method, comprising:
Step 1, the Electronic Assemblies cylinder of described TRMMMi-crowave Imager is installed on to described vacuum calibration temperature controller 40; Step 2, set the temperature of described vacuum calibration temperature controller 40, in the present embodiment, the range of temperature of described predetermined vacuum calibration temperature controller is-10～40 ℃, and the temperature setting that can in this step vacuum be calibrated to temperature controller 40 is set to-10 ℃; Step 3, by the radiation receive window of Electronic Assemblies cylinder respectively with the radiation-emitting window of described hot reference source 20, cold reference source 30, alternating temperature reference source 10 over against, and the output voltage of recorded electronic assembled pot respectively; The temperature of hot reference source 20, cold reference source 30 is set according to requirement of experiment, is definite value, and the temperature of alternating temperature reference source is adjustable; Step 4, described vacuum are calibrated the temperature-resistant of temperature controller 40, within the scope of predetermined alternating temperature reference source 10 temperature changes, in the present embodiment, predetermined alternating temperature reference source 10 temperature change scopes are 95～320K, according to the temperature test point of predetermined alternating temperature reference source 10, change the temperature of alternating temperature reference source, repeating step three; Step 5, in the range of temperature of predetermined vacuum calibration temperature controller, the temperature test point by predetermined vacuum calibration temperature controller, regulates vacuum to calibrate the temperature of temperature controller 40, and repeats step 3 and step 4; Step 6, the data that obtain according to step 3 to step 5, draw the bright temperature-output voltage curve at vacuum calibration temperature controller 40 each temperature.
Method provided by the present invention also comprises according to the bright temperature-output voltage curve at vacuum calibration temperature controller 40 each temperature and obtains vacuum calibration precision, the linearity and the scaled correction factor in-orbit.
In sum, the advantage of this vacuum scaling system is to adopt this set of vacuum scaling system both to solve the difficult problem that TRMMMi-crowave Imager complete machine cannot carry out vacuum calibration, obtained again and met the vacuum calibration data of application requirements in-orbit, and the calibration data that obtain can substitute the vacuum calibration of complete machine completely, human and material resources have greatly been saved simultaneously.
Claims (6)
1. a TRMMMi-crowave Imager ground vacuum robot scaling equipment, is characterized in that, comprising: vacuum calibration turntable, and the vacuum that is installed on described vacuum calibration turntable is calibrated temperature controller, and described vacuum calibration turntable drives vacuum calibration temperature controller to rotate; The hot reference source, cold reference source, the alternating temperature reference source that around described vacuum calibration turntable, arrange, the radiation receive window of the radiation-emitting window of described hot reference source, cold reference source, alternating temperature reference source and the measured piece of described TRMMMi-crowave Imager is contour.
2. according to TRMMMi-crowave Imager claimed in claim 1 ground vacuum robot scaling equipment, it is characterized in that, described measured piece is Electronic Assemblies cylinder.
3. a TRMMMi-crowave Imager ground vacuum calibrating method, is characterized in that, comprises the following steps:
Step 1, the Electronic Assemblies cylinder of described TRMMMi-crowave Imager is installed on to described vacuum calibration temperature controller; Step 2, set the temperature of described vacuum calibration temperature controller; Step 3, by the radiation receive window of Electronic Assemblies cylinder respectively with the radiation-emitting window of described hot reference source, cold reference source, alternating temperature reference source over against, and the output voltage of recorded electronic assembled pot respectively; Step 4, described vacuum are calibrated the temperature-resistant of temperature controller, within the scope of the temperature change of predetermined alternating temperature reference source, change the temperature of alternating temperature reference source, repeating step three according to the temperature test point of predetermined alternating temperature reference source; Step 5, in the range of temperature of predetermined vacuum calibration temperature controller, the temperature test point by predetermined vacuum calibration temperature controller, regulates vacuum to calibrate the temperature of temperature controller, and repeats step 3 and step 4; Step 6, the data that obtain according to step 3 to step 5, draw the temperature-output voltage curve at each temperature of vacuum calibration temperature controller.
4. according to TRMMMi-crowave Imager claimed in claim 2 ground vacuum calibrating method, it is characterized in that, also comprise according to described temperature-output voltage curve negotiating and calculate and obtain vacuum calibration precision, the linearity and the scaled correction factor in-orbit.
5. according to TRMMMi-crowave Imager claimed in claim 2 ground vacuum calibrating method, it is characterized in that, the range of temperature of described predetermined vacuum calibration temperature controller is-10～40 ℃, every 5～10 ℃, is a probe temperature point.
6. according to TRMMMi-crowave Imager claimed in claim 2 ground vacuum calibrating method, it is characterized in that, predetermined alternating temperature reference source temperature change scope is 95～320K.
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| CN201210276466.5A CN103576128A (en) | 2012-08-06 | 2012-08-06 | Microwave imager ground vacuum calibration device and method |
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| CN201210276466.5A CN103576128A (en) | 2012-08-06 | 2012-08-06 | Microwave imager ground vacuum calibration device and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483646A (en) * | 2014-12-24 | 2015-04-01 | 中国科学院空间科学与应用研究中心 | Real-time calibration device and method for ground-based microwave radiometer |
| CN106054147A (en) * | 2016-05-13 | 2016-10-26 | 国家卫星气象中心 | Microwave radiometer brightness temperature non-linear correction method and system |
| CN108680967A (en) * | 2018-04-03 | 2018-10-19 | 芜湖泰贺知信息系统有限公司 | A kind of robot scaling equipment and its Calibration Method for passive terahertz imaging instrument |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102081160A (en) * | 2009-11-30 | 2011-06-01 | 上海卫星工程研究所 | Detachable low-temperature connection device for microwave vacuum calibration |
| CN102519513A (en) * | 2011-11-15 | 2012-06-27 | 上海卫星工程研究所 | Ground vacuum calibration test method of satellite-borne passive microwave remote sensing instrument by use of three calibration sources |
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2012
- 2012-08-06 CN CN201210276466.5A patent/CN103576128A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102081160A (en) * | 2009-11-30 | 2011-06-01 | 上海卫星工程研究所 | Detachable low-temperature connection device for microwave vacuum calibration |
| CN102519513A (en) * | 2011-11-15 | 2012-06-27 | 上海卫星工程研究所 | Ground vacuum calibration test method of satellite-borne passive microwave remote sensing instrument by use of three calibration sources |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483646A (en) * | 2014-12-24 | 2015-04-01 | 中国科学院空间科学与应用研究中心 | Real-time calibration device and method for ground-based microwave radiometer |
| CN104483646B (en) * | 2014-12-24 | 2017-05-17 | 中国科学院空间科学与应用研究中心 | Real-time calibration device and method for ground-based microwave radiometer |
| CN106054147A (en) * | 2016-05-13 | 2016-10-26 | 国家卫星气象中心 | Microwave radiometer brightness temperature non-linear correction method and system |
| CN106054147B (en) * | 2016-05-13 | 2019-01-25 | 国家卫星气象中心 | A kind of method and system of the bright temperature gamma correction of microwave radiometer |
| CN108680967A (en) * | 2018-04-03 | 2018-10-19 | 芜湖泰贺知信息系统有限公司 | A kind of robot scaling equipment and its Calibration Method for passive terahertz imaging instrument |
| CN108680967B (en) * | 2018-04-03 | 2019-09-27 | 芜湖泰贺知信息系统有限公司 | A kind of robot scaling equipment and its Calibration Method for passive terahertz imaging instrument |
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Application publication date: 20140212 |