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Cloud Particle Spectrum Distribution Measurement Method and Measurement System

A measurement system and technology for cloud particles, which are applied in measurement devices, particle size analysis, scattering characteristics measurement, etc., can solve the problems of no proposed cloud particles and low measurement accuracy of cloud particles.

Active Publication Date: 2016-01-20
TIANJIN UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent CN102175591A utilizes the Mie forward scattering signal of cloud particles to the laser, divides the signal into two channels, and performs particle size measurement and particle determination in the depth of field respectively, and uses the scattered light intensity information to realize accurate measurement of cloud particle particle size, but this method The measurement accuracy of cloud particles is relatively low, and the patent does not propose an effective method for discriminating the phase state (liquid phase / ice phase) of cloud particles

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  • Cloud Particle Spectrum Distribution Measurement Method and Measurement System
  • Cloud Particle Spectrum Distribution Measurement Method and Measurement System
  • Cloud Particle Spectrum Distribution Measurement Method and Measurement System

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Embodiment 1

[0025] Embodiment 1: Cloud Particle Spectrum Distribution Measurement System

[0026] Such as figure 1 As shown, the present invention firstly provides a cloud particle spectrum distribution measurement system, which system includes a sheet polarized laser beam generation system, a particle scattered light detection system and a computer system;

[0027] The sheet polarized laser beam generation system includes a sheet polarized laser beam generation box 1, a laser 5 is arranged in the box, and a beam expander lens 6, a pinhole filter 7, and a collimator lens are sequentially arranged along the optical path of the laser output light. 8. Polarizer 9, convex cylindrical lens 10, concave cylindrical lens 11 and first reflector 12. An exit window 19 is provided on the box on the reflected light path of the first reflector, and the reflected light passes through the exit window. Incident to cloud particle scattering detection area 2;

[0028] The particle scattered light detec...

Embodiment 2

[0029] Embodiment 2: Cloud Particle Spectrum Distribution Measurement Method

[0030] Such as image 3 As shown, the method for measuring cloud particle spectrum distribution provided by the invention, the specific steps are as follows:

[0031] 1. The laser beam emitted by the laser in the box of the sheet polarized laser beam generation system is collimated into a plane wave through a beam expander lens, a pinhole filter and a collimator lens, and then forms a linearly polarized light through a polarizer, and then passes through a convex The cylindrical lens and the concave cylindrical lens compress the light beam into a sheet-like light beam, and then enter the cloud particle scattering detection area from the exit window of the box through the first reflector;

[0032] 2. Cloud particle scattered light enters the particle scattered light detection system from the incident window on the particle scattered light detection box, and then the cloud particle scattered light e...

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Abstract

A method and system for measuring cloud particle spectrum distribution. The measurement system includes a sheet polarized laser beam generation system, a particle scattered light detection system and a computer system. The measurement method of the present invention uses polarized light to irradiate cloud particles, and uses a spectroscopic prism to divide the scattering signal into two paths, one path directly uses a photoelectric image detector to detect the out-of-focus interferogram, and the other path passes through a depolarizer and then uses a photoelectric image detector to detect The detection of the defocused interferogram, through the comparison of the defocused interferogram and the defocused interferogram, the phase state of the cloud particles can be discriminated, and the information of the defocused interference fringe is used to invert the particle size of the liquid cloud and the ice cloud particle equivalent size. The invention provides a new diagnostic method for atmospheric particle detection, which can be used for airborne cloud microphysics detection, realizes online measurement of cloud particle phase, scale, distribution and water content, and provides a powerful tool for meteorological prediction and manual intervention. in accordance with.

Description

technical field [0001] The invention belongs to the technical field of cloud particle spectrum analysis and detection, and in particular relates to a cloud particle spectrum distribution measurement method and a measurement system for measuring the cloud particle spectrum distribution in the atmosphere and discriminating the cloud particle phase state. Background technique [0002] Cloud microphysical characteristics are usually described by cloud particle spectral distribution (phase state, scale, concentration and water content, etc.). The detection of cloud particle spectrum distribution is an important issue in the research fields of cloud physics, atmospheric physics and atmospheric dynamics, which can provide a theoretical basis for the prediction of artificial weather modification and small and medium-scale disaster weather. [0003] A variety of measurement techniques and methods based on different measurement principles and suitable for different measurement ranges ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/02G01N15/06G01N21/49
Inventor 张红霞翟梦冉吕且妮刘京贾大功
Owner TIANJIN UNIV
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