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Method and device for measuring scattering property of horizontally oriented particle swarm

A technology of horizontal orientation and scattering characteristics, applied in the field of measurement of particle swarm scattering characteristics, which can solve the problem of inability to measure the scattering characteristics of horizontally oriented particle swarms

Inactive Publication Date: 2013-06-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to solve the problem that the scattering characteristics of horizontally oriented particle groups in cirrus clouds cannot be measured at present, thereby providing a method and device for measuring the scattering characteristics of horizontally oriented particle groups

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  • Method and device for measuring scattering property of horizontally oriented particle swarm
  • Method and device for measuring scattering property of horizontally oriented particle swarm
  • Method and device for measuring scattering property of horizontally oriented particle swarm

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specific Embodiment approach 1

[0030] Specific implementation mode 1. Combination figure 1 Illustrate this specific embodiment, the measurement method of horizontal orientation particle swarm scattering characteristic, it is realized by the following steps:

[0031] Step 1, adopting a xenon searchlight to generate a light beam, the light beam irradiates the cirrus cloud layer in a vertical manner, and the light beam produces a diffuse reflection spot and a specular reflection spot under the action of horizontally oriented ice crystal particles in the cirrus cloud layer;

[0032] Step 2, using a CCD camera to observe the diffuse reflection facula and specular reflection facula generated in step 1;

[0033] Step 3, by adding two different filter lenses on the xenon searchlight, the light beam irradiates the cirrus cloud layer at two different wavelengths λ, and uses a CCD camera to observe the diffuse reflection facula and specular reflection facula generated N times;

[0034] and according to the formula: ...

specific Embodiment approach 2

[0052] Specific embodiment two, realize the measuring device of the horizontal orientation particle group scattering characteristic of specific embodiment one, it comprises xenon searchlight 1 and CCD camera 2, described xenon searchlight 1 is used for sending light beam to the ice crystal particle group in the cirrus cloud;

[0053] The CCD camera 2 is used to collect light beams under the action of horizontally oriented ice crystal particles in the cirrus cloud layer to generate diffuse reflection spots and specular reflection spots.

specific Embodiment approach 3

[0054] Embodiment 3. The difference between this embodiment and the device for measuring the scattering characteristics of horizontally oriented particle groups described in Embodiment 2 is that the CCD camera 2 has a focal length of 5 million pixels with a wavelength of 75 mm.

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Abstract

The invention discloses a method and a device for measuring scattering property of a horizontally oriented particle swarm, and relates to the field of atmospheric radiation, in order to solve the problem that the scattering property of the horizontally oriented particle swarm in cirrus cloud cannot be measured at present. The method takes a xenon search light as a light source and lower cloud as a measurement object, adopts a common long-focus charge coupled device (CCD) camera as recording equipment, utilizes the xenon search light to irradiate the lower cloud towards the zenith direction, and takes horizontally oriented ice crystal particles as a horizontal mirror, wherein a virtual image of the search light appears at the position of which the height is 2h, the angle widths of the ice crystal particles can be obtained according to the relation of the camera, a search light source and a light source virtual image, observable facula is divided into two parts when the direction of the camera is close to the zenith direction, and the angle range of a mirror image reflecting part needs to be constrained in that delta theta is approximately equal to lambda / D +2F. Thus, effective sizes D and vibration parameters F of the ice crystal particles can be derived from the obtained facula radius delta theta and ray wavelength lambda. The method and the device are suitable for measurement of the scattering property of the horizontally oriented particle swarm.

Description

technical field [0001] The invention relates to the field of atmospheric radiation, in particular to a method and device for measuring the scattering characteristics of particle groups. Background technique [0002] Cirrus clouds are one of the most widely distributed and common cloud types in the world. The main components of cirrus clouds are non-spherical ice crystal particles, mainly hexagonal columnar and flat-shaped ice crystal particles, and their average surface coverage exceeds 50%. In tropical regions The frequency of occurrence is as high as 70%. With the continuous improvement of detection methods and the continuous enhancement of data processing and analysis technology, cirrus clouds have gradually become the focus of researchers from all walks of life. As an optical property of matter itself, scattering properties can explain some common natural phenomena and be applied to environmental simulation, which has also attracted attention in recent years. [0003] ...

Claims

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Application Information

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IPC IPC(8): G01N15/00
Inventor 张寅关皓文丛明煜周程灏巩晋南陈静
Owner HARBIN INST OF TECH
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