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Method for measuring aerosol parameters by lateral laser radar based on CCD (charge-coupled device) imaging technology

A lateral laser radar and laser radar technology, which is applied in the measurement of scattering characteristics, etc., can solve the problems such as failure to effectively explore the lateral laser radar inversion method

Inactive Publication Date: 2015-07-01
中国人民解放军陆军军官学院
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AI Technical Summary

Problems solved by technology

Although it solves the problem of how to accurately determine the corresponding relationship between pixels in the CCD and the emitted beam, it fails to effectively explore a suitable inversion method for side-facing lidar

Method used

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  • Method for measuring aerosol parameters by lateral laser radar based on CCD (charge-coupled device) imaging technology
  • Method for measuring aerosol parameters by lateral laser radar based on CCD (charge-coupled device) imaging technology
  • Method for measuring aerosol parameters by lateral laser radar based on CCD (charge-coupled device) imaging technology

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Embodiment Construction

[0047] see figure 1 , figure 2 and image 3 , the method of measuring aerosol parameters by lateral lidar based on CCD imaging technology is as follows:

[0048] first,

[0049] To calibrate the CCD camera, it is specifically to first make the optical axis 1 of the CCD camera perpendicular to the plane of the calibration table 2, and then use the CCD camera 3 to obtain the CCD image of the calibration table 2; wherein, the opening angle 6 of the CCD camera 3 is 90 (can be 60-120) degrees, the vertical distance from the calibration table 2 is 5 (may be 5-10) m, the calibration table 2 is a single-line table, and the table in the single-line table is black and white with a side length of 1cm square table. Then, the declination angle θ and angular width dθ of each pixel are calculated from the number of the table in the CCD image of the calibration table 2 and the number of the same dimensional pixel in the table as the increment of the table number.

[0050] Second,

[00...

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Abstract

The invention discloses a method for measuring aerosol parameters by a lateral laser radar based on a CCD (charge-coupled device) imaging technology. The method comprises the following steps of: firstly, selecting a phase-comparison function value of aerosol to atmospheric molecules of a reference point in a horizontal direction; determining and affirming that a backscatter coefficient value of the aerosol on the reference point is equal to that at each scattering angle; inserting the drift angle (theta) and the angle width (dtheta) with each pixel of a CCD camera, and the vertical distance (D) between the CCD camera (3) and a beam (5) emitted by the laser radar into a lateral laser radar equation; taking the adjacent point as a new reference point after solving the phase-comparison function of the aerosol on the adjacent point from the value, gradually solving until a profile of the phase-comparison function of the aerosol is obtained; then affirming that the obtained phase-comparison function value of the aerosol in the horizontal direction is equal to that in the vertical direction, measuring the backscatter coefficient value of the aerosol at one height as the reference point, and obtaining the profile of the backscatter coefficient value of the aerosol by adopting the method. Therefore, the aerosol parameters conforming to the actual condition can be measured.

Description

technical field [0001] The invention relates to a method for measuring aerosol parameters by laser radar, in particular to a method for measuring aerosol parameters by lateral laser radar based on CCD imaging technology. Background technique [0002] CCD imaging lateral lidar is a new technology that is being researched internationally. It is to place the transmitting device and the receiving device in two places, and use the signal intensity on different pixels in the CCD camera to record the lateral direction of the emitted beam at different distances. Scattered light intensity. The vertical distance from the CCD camera to the emitted beam is generally 5 to 200m, and the opening angle of the CCD camera can reach 90 degrees. In this way, the beam range that can be detected by the CCD camera can be from 0 to 5 km. [0003] This principle and device are different from ordinary lidar-backscatter lidar. Ordinary lidar receives back scattered light, while CCD imaging side lid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/49
Inventor 陶宗明麻晓敏陈向春张清泽陈宇储德林
Owner 中国人民解放军陆军军官学院
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