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Atmospheric aerosol analysis method based on coherent laser radar spectral intensity data

An atmospheric aerosol and lidar technology, which is applied in the direction of material analysis, material analysis, color/spectral property measurement by optical means, etc., can solve the problems of atmospheric aerosol analysis that have not yet appeared coherent lidar

Active Publication Date: 2020-07-28
青岛镭测创芯科技有限公司
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Problems solved by technology

[0006]There are no current applications of coherent lidar for atmospheric aerosol analysis

Method used

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  • Atmospheric aerosol analysis method based on coherent laser radar spectral intensity data
  • Atmospheric aerosol analysis method based on coherent laser radar spectral intensity data
  • Atmospheric aerosol analysis method based on coherent laser radar spectral intensity data

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Embodiment Construction

[0038] The detection process of the coherent laser radar is the frequency mixing detection of the laser local oscillator signal and the radar echo signal in space. Among them, the laser local oscillator signal is a narrow bandwidth signal with a certain intensity derived from the laser seed source. The echo of the laser emission pulse in the atmosphere is received by the same optical device, and then mixed with the local oscillator light in space, and then the optical signal is converted into an electrical signal by the detector.

[0039] Among them, the local oscillator signal of the coherent lidar system is:

[0040]

[0041] A od is the local oscillator amplitude, is the optical phase of the local oscillator, f od is the optical frequency of the local oscillator; x and y are the plane coordinate information of the optical distribution of the local oscillator, and t corresponds to the time information; the above form is a complex representation, where the real part re...

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Abstract

The present invention provides an atmospheric aerosol analysis method based on coherent laser radar spectrum intensity data, according to the signal detection process analysis of the coherent laser radar, the maximum intensity of the gate spectrum data of different distances contains atmospheric echo information. Spectral intensity data of corresponding height is extracted and can correspondinglyinclude an atmospheric extinction coefficient and a backscattering coefficient atmospheric laser radar equation. The atmospheric extinction coefficient is inverted by utilizing the calculation relationship between the atmospheric backscattering coefficient and the atmospheric extinction coefficient. The coherent laser radar carries out aerosol detection, the application function of the coherent radar is expanded, and the data utilization rate of a coherent system is improved. Compared with traditional aerosol laser radar detection, the spectral intensity data is large in signal-to-noise ratio,and the detection distance and precision have obvious advantages. Moreover, the coherent laser radar is compact in structure, optical components are stable and reliable, and the reliability of the used environment is superior to that of a traditional aerosol radar.

Description

technical field [0001] The invention relates to a method for aerosol analysis by using laser radar, in particular to a method for measuring atmospheric aerosol information based on coherent laser radar spectral intensity data. Background technique [0002] Atmospheric information, such as wind speed, temperature, humidity, aerosol, cloud and other information, plays a very important role. Whether it is for weather forecasting, safe and efficient operation of airports, monitoring of air pollutants, or military applications, it plays a very important role. [0003] The measurement information of lidar has high temporal and spatial resolution and can be measured continuously, which has obvious advantages compared with traditional atmospheric detection methods. Coherent lidar systems have mature applications, but they are mainly used for atmospheric wind field measurement. In coherent lidar, the echo intensity is converted into spectral data by methods such as Fourier transfor...

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Application Information

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IPC IPC(8): G01S17/95G01S7/48G01N21/27
CPCG01S17/95G01S7/4802G01N21/27G01N2021/1744Y02A90/10
Inventor 秦胜光尹嘉萍王希涛李荣忠宋小全吴松华
Owner 青岛镭测创芯科技有限公司
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