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Radar altimeter used for detecting and landing in rail

A radar altimeter and electrical connection technology, applied in the field of radar altimeter, to achieve the effect of ensuring safe landing and reducing complexity

Inactive Publication Date: 2009-06-24
CENT FOR SPACE SCI & APPLIED RES
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] The purpose of the present invention is to overcome the defect that the existing radar altimeter can only be used for altitude measurement when orbiting a star, or can only be used for altitude measurement when a lander lands, thereby providing a radar altimeter that can be used for orbiting a star. Altitude measurement, in turn an altimeter that measures altitude while the lander is on the ground

Method used

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Embodiment Construction

[0023] The radar altimeter of the present invention will be described below in conjunction with the accompanying drawings and specific embodiments.

[0024] Such as figure 1 As shown, make a radar altimeter of the present invention, this altimeter comprises: data processing unit 1, timing unit 2, the first direct digital synthesizer 3 (Direct Digital Synthesizer), the second direct digital synthesizer 4, amplifier 5. Power divider 6, power amplifier 7, switch network 8, first antenna 9, first low noise amplifier 10, first mixer 11, first filter amplifier 12, quadrature detection unit 13, first modulus Conversion unit 14, first digital filter unit 15, second antenna 16, attenuator 17, second low noise amplifier 18, second mixer 19, second filter amplifier 20, second analog-to-digital conversion unit 21 and second Digital filtering unit 22. Wherein said data processing unit 1 is respectively connected with said timing unit 2, first digital filter unit 15, second digital filte...

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Abstract

The invention discloses a radar altimeter for on-orbit detection and landing. On the basis of the existing pulse compression radar altimeter, a data processing unit is further connected with a second digital filtering unit, a second direct digital synthesizer, The attenuator is electrically connected to the second filter amplifier; the timing unit is also electrically connected to the second direct digital synthesizer and the second analog-to-digital conversion unit; the second antenna is electrically connected to the attenuator, and the attenuator is electrically connected to the second low-noise amplifier connected, the second low-noise amplifier is electrically connected to the second mixer, the second mixer is electrically connected to the second filter amplifier, the second filter amplifier is electrically connected to the second analog-to-digital conversion unit, and the second analog-to-digital conversion unit The unit is then electrically connected to the second digital filtering unit. The invention not only has the ability to measure the height of the planet's surface on the orbit, but also has the ability to provide the height measurement and the speed measurement for the lander's landing process.

Description

technical field [0001] The invention relates to a radar altimeter, in particular to a radar altimeter which can be used for both on-orbit detection and landing, that is, a radar altimeter for on-orbit detection and landing. Background technique [0002] A radar altimeter is a radar instrument used to measure the height between the antenna surface of the instrument and the measured target. The existing radar altimeters used in space applications are generally divided into two types according to the purpose, one is the landing radar altimeter used by the aircraft when it lands, and the other is used by the aircraft when it is running on the satellite orbit The radar altimeter used for in-orbit detection. [0003] A typical application of a landing radar altimeter is in lunar exploration, where it is used to assist a lunar lander in landing. For example, the altimeter measurement range of the "Explorer" lunar landing spacecraft is 4m-12km; the measurement height range of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/08G01S13/10G01S13/89
Inventor 许可唐月英于秀芬刘和光
Owner CENT FOR SPACE SCI & APPLIED RES
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