CN108088570A - A kind of radiometers image-forming method based on phase-array scanning system - Google Patents
A kind of radiometers image-forming method based on phase-array scanning system Download PDFInfo
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- CN108088570A CN108088570A CN201611038354.0A CN201611038354A CN108088570A CN 108088570 A CN108088570 A CN 108088570A CN 201611038354 A CN201611038354 A CN 201611038354A CN 108088570 A CN108088570 A CN 108088570A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000012360 testing method Methods 0.000 claims abstract description 13
- 230000005855 radiation Effects 0.000 claims abstract description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000003786 synthesis reaction Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 230000007423 decrease Effects 0.000 claims 1
- 238000003384 imaging method Methods 0.000 abstract description 3
- 230000005284 excitation Effects 0.000 abstract description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
-
- 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
- G01J5/80—Calibration
Abstract
The invention discloses a kind of radiometers image-forming method based on phase-array scanning system, including：Control computer（1）, millimeter wave radiometer（2）, DC power supply II（3）, DC power supply III（4）, phased array antenna（5）, DC power supply I（6）, millimeter wave noise head（7）And precision attenuator（8）.Under+28V DC voltages the excitation of DC power supply I, millimeter wave noise head generates the noise temperature output of accurate calibration in required millimere-wave band, by the noise temperature needed for the manual adjustment precision attenuator output of millimeter wave.Control computer（1）Phase array antenna beam switching is controlled, carries out two dimensional image acquisition and storage.The present invention only needs a radiometer, and without servo mechanism, has many advantages, such as that equipment is simple, easy to operate, test equivalent noise temperature is adjustable compared with conventional radiation meter imaging method.
Description
Technical field
The present invention relates to a kind of radiometers image-forming methods, particularly a kind of radiometers image-forming based on phase-array scanning system
Method.
Background technology
Tailored radiation meter can only be to being directed toward point feedback temperature signal, to radiometer is used to be imaged in two dimensional surface, mesh
What the preceding radiometer array and motion servo mechanism mainly formed using multiple radiometers was completed, the quantity of radiometer determines one
The resolution ratio of a dimension, the motion amplitude of motion servo determine another dimension.This method needs more radiation and specially
With motion, cost is higher, and there are temperature drift between more radiometers, calibration is complicated, and areas imaging and resolution are difficult to
Change.There are test equipment and test environment complexity, testing times high to source temperature coherence request for this test method
The long, problems such as efficiency is low.
The content of the invention
Present invention aims at a kind of radiometers image-forming method based on phase-array scanning system is provided, solve using tradition
The problem of temperature consistency requirement is high between test method radiometer, testing process is complicated, the testing time is long, efficiency is low.
A kind of radiometers image-forming method based on phase-array scanning system, concretely comprises the following steps：
The first step builds the radiometers image-forming system based on phase-array scanning system
Radiometers image-forming system based on phase-array scanning system, including：Control computer, millimeter wave radiometer, direct current
Power supply II, DC power supply III, phased array antenna, DC power supply I, millimeter wave noise head and precision attenuator.
The 28V voltage output ends of DC power supply I are connected with the input terminal of millimeter wave noise head；The noise of millimeter wave noise head
The input terminal of temperature output terminal and precision attenuator connects；The output terminal of precision attenuator and the input terminal of millimeter wave radiometer connect
It connects；The output terminal of millimeter wave radiometer is connected with phased array antenna；The output terminal of DC power supply II and millimeter wave radiometer it is straight
Flow offset side connection.The output voltage adjustable range of DC power supply II is 0-25V, the output voltage 56V of DC power supply III.
Wherein it is comprising acquisition control module, the function of acquisition control module in control computer：Control phased array antenna
Beam switchover carries out two dimensional image acquisition and storage.
Second step start preheating and steady-working state
Preheating stable operation, voltage value needed for setting are booted up, and is connected to corresponding offset port.Treat a millimeter amplitude
After penetrating meter, three DC power supplies and phased array antenna stable working state, then carry out testing process.
3rd step determines number of scan points and coordinate
According to the orientation coordinate of sweep spacing angle-determining millimeter wave radiometer scan image and pitching to coordinate.If it sweeps
Retouch at intervals of θ, orientation and pitching to scanning angle scope be respectively α, β.Then orientation, pitching are distinguished to number of scan points m, n
For
Wherein [] represents downward rounding.It is respectively per point coordinates
4th step acquisition control module demarcates millimeter wave radiometer and phased array antenna
Acquisition control module carries out millimeter wave radiometer and is demarcated with phased array antenna.Phased array antenna is directed at 70 DEG C of high temperature
Constant temperature source collects 70 DEG C of high temperature constant temperature source calibration data vecHot [mn]；Then by phased array antenna to quasi- 10 DEG C of low temperature
Constant temperature source collects -10 DEG C of cryogenic thermostat source calibration data vecCold [mn]；Obtain low temperature average value：
AveCold：Low temperature average value；
vecCold[i]：I-th road lower temperature scale；
High temperature and low temperature difference average value：
DiffAve：High temperature and low temperature difference average value；
vecHot[i]：I-th road high temperature scale；
5th step spotting image
Target image is gathered, image data OriginalData [mn] is obtained, calibration compensation finally is carried out to target image,
Separate compensation is carried out to each millimeter wave radiometer point：
CompensateData[i]：Data after i-th road internal calibration compensation；
OriginalData[i]：Data before i-th road internal calibration compensation；
AveCold：Low temperature average value；
DiffAve：High temperature and low temperature difference average value；
Data CompensateData [mn] after finally CompensateData [i] synthesis is compensated, in completion
Calibration.
Method proposes the radiometers image-forming methods based on phase-array scanning system, realize small size, high measurement essence
The degree imaging demand short with the testing time.28V DC voltages needed for DC power supply I supply millimeter wave noise heads, in 28V direct currents
Under the excitation of voltage, millimeter wave noise head generates the noise temperature output of accurate calibration in required millimere-wave band, by millimeter wave
Noise temperature needed for manual adjustment precision attenuator output.The manual adjustment precision attenuator of millimeter wave can outside cabinet hand
The variation of differential declines amount is completed under the control of dynamic knob, so as to export different noise temperatures, which will make
For the benchmark of radiation meter temperature sensitivity measure.Acquisition control module control phase array antenna beam in control computer is cut
It changes, carries out two dimensional image acquisition and storage.Radiometers image-forming method proposed by the present invention can simplify testing process, improve test
Efficiency reduces testing cost.
Description of the drawings
A kind of radiometers image-forming method system composition schematic diagrams based on phase-array scanning system of Fig. 1；
1. II 4. DC power supply of control computer 2. millimeter wave radiometer, 3. DC power supply, III 5. phased array antenna 6.
First 8. precision attenuator of 7. millimeter wave noises of DC power supply I
Specific embodiment
A kind of radiometers image-forming method based on phase-array scanning system, concretely comprises the following steps：
The first step builds the radiometers image-forming system based on phase-array scanning system
Radiometers image-forming system based on phase-array scanning system, including：It is control computer 1, millimeter wave radiometer 2, straight
Galvanic electricity source II 3, DC power supply III 4, phased array antenna 5, DC power supply I6, millimeter wave noise first 7 and precision attenuator 8.
The 28V voltage output ends of DC power supply I6 are connected with the input terminal of millimeter wave noise first 7；Millimeter wave noise first 7
Noise temperature output terminal is connected with the input terminal of precision attenuator 8；The output terminal of precision attenuator 8 and millimeter wave radiometer 2
Input terminal connects；The output terminal of millimeter wave radiometer 2 is connected with phased array antenna 5；The output terminal and millimeter wave of DC power supply II 3
The direct current biasing end connection of radiometer 2.The output voltage adjustable range of DC power supply II 3 be 0-25V, DC power supply III 4 it is defeated
Go out voltage 56V.
Wherein it is comprising acquisition control module, the function of acquisition control module in control computer 1：Control phased array antenna
5 beam switchovers carry out two dimensional image acquisition and storage.
Second step start preheating and steady-working state
Preheating stable operation, voltage value needed for setting are booted up, and is connected to corresponding offset port.Treat a millimeter amplitude
After penetrating 2, three DC power supplies of meter and 5 stable working state of phased array antenna, then carry out testing process.
3rd step determines number of scan points and coordinate
According to the orientation coordinate of 2 scan image of sweep spacing angle-determining millimeter wave radiometer and pitching to coordinate.If
Sweep spacing is θ, orientation and pitching to scanning angle scope be respectively α, β.Then orientation, pitching divide to number of scan points m, n
It is not
Wherein [] represents downward rounding.It is respectively per point coordinates
4th step acquisition control module demarcates millimeter wave radiometer 2 and phased array antenna 5
Acquisition control module carries out millimeter wave radiometer 2 and is demarcated with phased array antenna 5.Phased array antenna 5 is directed at 70 DEG C
High temperature constant temperature source collects 70 DEG C of high temperature constant temperature source calibration data vecHot [mn]；Then by phased array antenna 5 to quasi- 10
DEG C cryogenic thermostat source, collects -10 DEG C of cryogenic thermostat source calibration data vecCold [mn]；Obtain low temperature average value：
AveCold：Low temperature average value；
vecCold[i]：I-th road lower temperature scale；
High temperature and low temperature difference average value：
DiffAve：High temperature and low temperature difference average value；
vecHot[i]：I-th road high temperature scale；
5th step spotting image
Target image is gathered, image data OriginalData [mn] is obtained, calibration compensation finally is carried out to target image,
To each 2 points of progress separate compensations of millimeter wave radiometer：
CompensateData[i]：Data after i-th road internal calibration compensation；
OriginalData[i]：Data before i-th road internal calibration compensation；
AveCold：Low temperature average value；
DiffAve：High temperature and low temperature difference average value；
Data CompensateData [mn] after finally CompensateData [i] synthesis is compensated, in completion
Calibration.
Claims (1)
- A kind of 1. radiometers image-forming method based on phase-array scanning system, it is characterised in that concretely comprise the following steps：The first step builds the radiometers image-forming system based on phase-array scanning systemRadiometers image-forming system based on phase-array scanning system, including：It is control computer (1), millimeter wave radiometer (2), straight Galvanic electricity source II (3), DC power supply III (4), phased array antenna (5), DC power supply I (6), millimeter wave noise head (7) and precision decline Subtract device (8)；The 28V voltage output ends of DC power supply I (6) are connected with the input terminal of millimeter wave noise head (7)；Millimeter wave noise head (7) Noise temperature output terminal be connected with the input terminal of precision attenuator (8)；The output terminal and millimeter-wave radiation of precision attenuator (8) Count the input terminal connection of (2)；The output terminal of millimeter wave radiometer (2) is connected with phased array antenna (5)；DC power supply II (3) Output terminal is connected with the direct current biasing end of millimeter wave radiometer (2)；The output voltage adjustable range of DC power supply II (3) is 0- 25V, the output voltage 56V of DC power supply III (4)；Wherein it is comprising acquisition control module, the function of acquisition control module in control computer (1)：Control phased array antenna (5) beam switchover carries out two dimensional image acquisition and storage；Second step start preheating and steady-working statePreheating stable operation, voltage value needed for setting are booted up, and is connected to corresponding offset port；Treat millimeter wave radiometer (2), after three DC power supplies and phased array antenna (5) stable working state, then testing process is carried out；3rd step determines number of scan points and coordinateAccording to the orientation coordinate of sweep spacing angle-determining millimeter wave radiometer (2) scan image and pitching to coordinate；If it sweeps Retouch at intervals of θ, orientation and pitching to scanning angle scope be respectively α, β；Then orientation, pitching are distinguished to number of scan points m, n ForWherein [] represents downward rounding；It is respectively per point coordinates4th step acquisition control module calibration millimeter wave radiometer (2) and phased array antenna (5)Acquisition control module carries out millimeter wave radiometer (2) and is demarcated with phased array antenna (5)；Phased array antenna (5) is directed at 70 DEG C high temperature constant temperature source, collects 70 DEG C of high temperature constant temperature source calibration data vecHot [mn]；Then it is phased array antenna (5) is right Quasi- 10 DEG C of cryogenic thermostat sources collect -10 DEG C of cryogenic thermostat source calibration data vecCold [mn]；Obtain low temperature average value：AveCold：Low temperature average value；vecCold[i]：I-th road lower temperature scale；High temperature and low temperature difference average value：DiffAve：High temperature and low temperature difference average value；vecHot[i]：I-th road high temperature scale；5th step spotting imageTarget image is gathered, image data OriginalData [mn] is obtained, calibration compensation finally is carried out to target image, to every One millimeter wave radiometer (2) point carries out separate compensation：CompensateData[i]：Data after i-th road internal calibration compensation；OriginalData[i]：Data before i-th road internal calibration compensation；AveCold：Low temperature average value；DiffAve：High temperature and low temperature difference average value；Data CompensateData [mn] after finally CompensateData [i] synthesis is compensated, completes internal calibration.
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| CN201611038354.0A CN108088570B (en) | 2016-11-23 | 2016-11-23 | Radiometer imaging method based on phased array scanning system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109297589A (en) * | 2018-08-28 | 2019-02-01 | 北京遥感设备研究所 | A kind of test macro for W-waveband radiometer infrared radiation characteristics |
| CN109490979A (en) * | 2018-11-12 | 2019-03-19 | 北京航空航天大学 | A kind of millimeter wave radiometer array structure and design method suitable near field fast imaging |
| CN112630746A (en) * | 2020-12-01 | 2021-04-09 | 北京遥感设备研究所 | Pulse Doppler laser radar for long-distance target measurement |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109297589A (en) * | 2018-08-28 | 2019-02-01 | 北京遥感设备研究所 | A kind of test macro for W-waveband radiometer infrared radiation characteristics |
| CN109490979A (en) * | 2018-11-12 | 2019-03-19 | 北京航空航天大学 | A kind of millimeter wave radiometer array structure and design method suitable near field fast imaging |
| CN109490979B (en) * | 2018-11-12 | 2020-05-29 | 北京航空航天大学 | Millimeter wave radiometer array structure suitable for near-field rapid imaging and design method |
| CN112630746A (en) * | 2020-12-01 | 2021-04-09 | 北京遥感设备研究所 | Pulse Doppler laser radar for long-distance target measurement |
| CN112630746B (en) * | 2020-12-01 | 2023-09-15 | 北京遥感设备研究所 | Pulse Doppler laser radar for measuring long-distance target |
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