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A motion scanning device and method for a microwave radiometer in a geostationary orbit

A technology of microwave radiometer and geostationary orbit, which is applied in the field of microwave radiometer beam scanning, can solve problems such as difficult to control the phase consistency of vibration elements, large driving torque, and bearing platform magnitude torque interference, so as to improve beam scanning efficiency and reduce Drive torque, effect of reducing disturbance torque

Active Publication Date: 2021-06-22
SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For microwave radiometers in geostationary orbit, the antenna diameter and mass of the reflector are large, and two-dimensional fast scanning of the ground is required. The above scanning method needs to provide a large driving torque, or bring a large magnitude of torque to the supporting platform. interference, making it impossible for the satellite platform to compensate
If the method of array electric scanning is adopted, it is difficult to control the consistency of the phase of the vibration element when the observation frequency band is high, which will seriously affect the detection accuracy and cannot be used

Method used

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  • A motion scanning device and method for a microwave radiometer in a geostationary orbit
  • A motion scanning device and method for a microwave radiometer in a geostationary orbit
  • A motion scanning device and method for a microwave radiometer in a geostationary orbit

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Embodiment 1

[0041] see image 3 , the present embodiment provides a motion scanning device for a microwave radiometer in a static orbit, comprising: a cascaded antenna reflective surface group 8, a rotating scanning mirror group, and a quasi-optical feeder 6 are sequentially arranged along the microwave radiation direction;

[0042] The cascaded antenna reflection surface group 8 is used to reflect microwave radiation input to the rotating scanning mirror group. Wherein, the above-mentioned cascaded antenna reflective surface group 8 is sequentially provided with a cascaded antenna first reflective surface 81 , a cascaded antenna second reflective surface 82 and a cascaded antenna third reflective surface 83 along the microwave radiation direction.

[0043] The cascaded antenna reflecting surface group 8 in this embodiment receives microwave radiation generated in the observation area. First, the microwave radiation enters the rotating scanning mirror group through the cascaded antenna r...

Embodiment 2

[0054] see Image 6 , the present embodiment provides a motion scanning method based on embodiment 1 of a geostationary microwave radiometer, comprising the following steps:

[0055] S1: Receive and reflect external microwave radiation signals;

[0056] S2: The first rotating scanning mirror and the second rotating scanning mirror arranged parallel to each other rotate around the rotation axis together to perform secondary mirroring on each point on the space curve of the reflected output microwave radiation signal, so that the beam of the microwave radiation signal is output in a directional manner ;

[0057] S3: receiving and measuring the microwave radiation signal output by the beam orientation.

[0058] The present embodiment is described in detail now:

[0059] In step S1 of this embodiment, the cascaded antenna reflecting surface group receives and reflects external microwave radiation signals.

[0060] In step S2 of this embodiment, the lateral offset distance of t...

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Abstract

The invention discloses a static-orbit microwave radiometer motion scanning device and method. The device includes: a cascaded antenna reflection surface group, a rotating scanning mirror group, and a quasi-optical feeding part are sequentially arranged along the microwave radiation direction; the rotating scanning mirror group includes The drive unit, the first rotating scanning mirror, the second rotating scanning mirror, and the fixed bracket, the first rotating scanning mirror and the second rotating scanning mirror are respectively fixed at both ends of the fixing bracket, and the first rotating scanning mirror is parallel to the second rotating scanning mirror Setting, one end of the fixed bracket is also drivingly connected with the rotating shaft of the driving part, the fixed bracket and the rotating shaft are vertically arranged, and the rotating shaft of the driving part is set at an angle of 45 degrees with the first rotating scanning mirror; the entrance of the quasi-optical power feeding part is connected to the first The line connecting the center points of the rotating scanning mirror is parallel to the axial direction of the rotating shaft. The invention utilizes the mirror image effect of the rotating scanning mirror to make the receiving part defocus equivalently, realize circular scanning of the beam, reduce the disturbing moment, and increase the scanning speed of the beam.

Description

technical field [0001] The invention belongs to the technical field of microwave radiometer beam scanning, and in particular relates to a motion scanning device and method for a microwave radiometer in a static orbit. Background technique [0002] Microwave remote sensing is a new field that was put into application in the 1960s, and microwave radiometer is a relatively mature subfield. The microwave radiometer's cloud and rain penetration, all-weather detection capability and detection capability of the ocean and the interior of the earth's surface make it widely used in the fields of meteorology, ocean, land, atmospheric environment and deep space detection. [0003] The microwave radiometer receives the radiation of the observation scene itself through the antenna, and feeds it into the receiver of each frequency band through the feed network. The receiver converts the microwave radiation signal into an electrical signal. The information processing unit samples and frames...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/48
CPCG01D5/48
Inventor 谢振超李向芹姚崇斌邙晓斌李雪李贝贝
Owner SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM