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Radiometer imaging method based on phased array scanning system

An imaging method and radiometer technology, applied in the field of radiometer imaging, can solve problems such as low efficiency, high requirements for radiometer temperature consistency, and complex testing procedures.

Active Publication Date: 2018-05-29
BEIJING INST OF REMOTE SENSING EQUIP
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Problems solved by technology

[0003] The purpose of the present invention is to provide a radiometer imaging method based on a phased array scanning system, which solves the problems of high temperature consistency between radiometers, complicated test process, long test time and low efficiency using the traditional test method

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Embodiment Construction

[0036] A radiometer imaging method based on a phased array scanning system, the specific steps of which are:

[0037] The first step is to build a radiometer imaging system based on the phased array scanning system

[0038] Radiometer imaging system based on phased array scanning system, including: control computer 1, millimeter wave radiometer 2, DC power supply Ⅱ3, DC power supply Ⅲ4, phased array antenna 5, DC power supply I6, millimeter wave noise head 7 and precision attenuation device 8.

[0039] The 28V voltage output end of the DC power supply I6 is connected to the input end of the millimeter wave noise head 7; the noise temperature output end of the millimeter wave noise head 7 is connected to the input end of the precision attenuator 8; the output end of the precision attenuator 8 is connected to the millimeter wave radiation The input terminal of the meter 2 is connected; the output terminal of the millimeter wave radiometer 2 is connected with the phased array an...

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Abstract

The invention discloses a radiometer imaging method based on a phased array scanning system. The system according to the radiometer imaging method comprises a control computer (1), a millimeter wave radiometer (2), a DC power supply II (3), a DC power supply III (4), a phased array antenna (5), a DC power supply I (6), a millimeter wave noise head (7) and a precision attenuator (8). The millimeterwave noise head generates the accurately calibrated noise temperature output in the required millimeter wave band under the +28V DC voltage excitation of the DC power supply I and the required noisetemperature is outputted through millimeter wave manual adjusting precision attenuator. The control computer (1) controls switching of the phased array antenna beams to perform two-dimensional image acquisition and storage. Compared with the conventional radiometer imaging method, only one radiometer is required without servo mechanism so as to have the advantages of simple equipment, easy and convenient operation and adjustable equivalent noise temperature test.

Description

technical field [0001] The invention relates to a radiometer imaging method, in particular to a radiometer imaging method based on a phased array scanning system. Background technique [0002] A single radiometer can only feed back temperature signals to pointing points. If a radiometer is to be used to image in a two-dimensional plane, it is currently completed using a radiometer array composed of multiple radiometers and a motion servo mechanism. The number of radiometers determines a The resolution of one dimension, the motion amplitude of the motion servo determines another dimension. This method requires more radiation and a special motion mechanism, which is costly, and there is temperature drift between multi-radiometers, and the calibration is complicated, and the imaging range and resolution are difficult to change. This test method has problems such as complex test equipment and test environment, high requirements for radiation source temperature consistency, long...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/10
CPCG01J5/10G01J5/80
Inventor 吴海涵赵崇辉崔广斌
Owner BEIJING INST OF REMOTE SENSING EQUIP
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