Hybrid laser radar for Mars atmosphere detection

A laser radar and atmospheric detection technology, applied in the field of laser radar, can solve the problems of restricting the development of Mars atmospheric detection and the difficulty of realizing the atmospheric laser radar system

Pending Publication Date: 2021-06-08
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

[0006] However, since Mars atmospheric exploration not only requires wind field detection, but also aerosol particle concentration, type, and distribution detection; carbon dioxide gas concentration detection, single coherent detection o...

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  • Hybrid laser radar for Mars atmosphere detection
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Embodiment Construction

[0018] The present invention will be described in detail below in conjunction with the accompanying drawings. As a part of this description, the principle of the present invention will be described through implementation. Other aspects, features and advantages of the present invention will become clear through the detailed description.

[0019] see figure 2 , which shows a hybrid laser mine for Mars atmospheric detection which is composed of optical transceiver module A, coherent balance detection module B, single-light direct detection module C and data processing module D in the present invention, wherein:

[0020] The optical transceiver module A divides the variable-wavelength continuous-wave laser signal into signal light and local oscillator light, obtains and emits energy-amplified frequency-shifted pulsed light into the atmosphere, and obtains the backward direction from Martian atmospheric molecules and dust. scattered signal;

[0021] The coherent balance detection...

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Abstract

The invention relates to a hybrid laser radar for Mars atmosphere detection. The hybrid laser radar comprises a single set of optical transceiver module for obtaining back scattering signals from Mars atmosphere molecules and dust; a coherent balance detection module which mixes the local oscillation light and the atmospheric echo signal into an intermediate frequency electric signal and converts the intermediate frequency electric signal into a high-speed analog electric signal, so a Mars atmospheric wind field is obtained through data processing; a single-photon direct detection module which is used for measuring photon electric signals of each channel to obtain photon count of each channel; and a data processing module which obtains the concentration of polarized light and Mars aerosol particles. The laser power and the echo signal stability are calibrated by using the signal-to-noise ratio of coherent detection and the photon number of direct detection, and the method is used for detecting the content of carbon dioxide gas. The hybrid laser radar has the advantages of large dynamic range and small data processing calculation amount by using single photon direct detection, and also has the advantages of high coherent detection sensitivity and good weak signal amplification performance, and the problem of multi-atmosphere parameter detection of the Mars atmosphere detection laser radar is solved under the condition that the load weight and complexity are not increased.

Description

technical field [0001] The invention belongs to the technical field of laser radar, and in particular relates to a hybrid laser radar for Mars atmospheric detection. Background technique [0002] Mars exploration is the focus of solar system exploration and planetary science at home and abroad. Human Mars exploration has a history of nearly 60 years. The detection methods range from flyby to orbiting remote sensing detection, and then to unmanned lander and Mars rover detection. scientific data. In 2020, China launched the Tianwen-1 Mars probe. China plans to carry out its first Mars exploration and Mars sampling return between 2020 and 2030. Mars / Phobos sampling return and Mars manned exploration in countries around the world are also planned in the next 10-2030. Achieved within 20 years. [0003] At present, the atmosphere of Mars is less than 1% of that of the Earth, mainly composed of carbon dioxide, which circulates between the atmosphere and the polar ice caps, causi...

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Application Information

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IPC IPC(8): G01S17/88G01S17/95G01N21/53G01N21/39G01J4/00
CPCG01S17/88G01S17/95G01N21/53G01N21/39G01J4/00G01N2021/4709G01N2021/4792G01N2021/392Y02A90/10
Inventor 王冲孙翔宇薛向辉
Owner UNIV OF SCI & TECH OF CHINA
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