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Airborne backscattering cloud particle detecting instrument, meteorological detecting device and cloud particle detecting method

A backscattering and cloud particle technology, applied in the direction of instruments, measuring devices, particle size analysis, etc., can solve the problems of polarization ambiguity, which has not yet appeared, and accurately distinguish the phase and size of cloud particles, and achieve multi-function and simple overall structure Effect

Pending Publication Date: 2018-07-31
CHENGDU UNIV OF INFORMATION TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Using a linearly polarized laser beam as the light source to measure the linearly polarized component of backscattering works well when backscattering is dominated by single scattering, but when the concentration of particles is large and multiple scattering dominates, it can lead to polarization Fuzzy, it is difficult to correctly distinguish the particle shape
[0005] In summary, there is no detection instrument that can accurately distinguish the phase and size of cloud particles in the case of large concentrations in the prior art

Method used

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  • Airborne backscattering cloud particle detecting instrument, meteorological detecting device and cloud particle detecting method
  • Airborne backscattering cloud particle detecting instrument, meteorological detecting device and cloud particle detecting method

Examples

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Embodiment 1

[0046] Example 1: Such as figure 1 , figure 2 The airborne backscattering cloud particle detector shown includes: a laser source 1, a circular polarizer 2, a first focusing mirror 3, an optical window 4, a cloud particle to be measured 5, a first collimator 6, a second Focusing mirror 7, second collimating mirror 8, band pass filter 9, quarter wave plate 10, polarization beam splitting prism 11, third focusing mirror 12, P light detector 13, fourth focusing mirror 14, S light detector 15, signal amplifying circuit board 16, signal acquisition and processing board 17; among them, the laser light emitted by the laser source 1 sequentially passes through the circular polarizer 2, the first focusing mirror 3, and the optical window 4 to converge on the first focusing mirror 3 Focus position; the cloud particle 5 to be measured passes through the focused light and scatters light, and the backscattered light generated by it passes through the 4f system composed of the first collimat...

Embodiment 2

[0050] Embodiment 2: A weather detection drone, which has the airborne backscatter cloud particle detector described in Embodiment 1.

[0051] In summary, the solution of the present invention uses the circular polarization direction of the backscattered light generated by the circularly polarized light to illuminate the particles to detect and analyze the phase state of cloud particles, which can effectively distinguish cloud particles in the case of large particle concentrations Compared with the existing linearly polarized laser method of detecting the phase state of particles, the measurement is more accurate and the application range is wider. It can be applied to cloud physics research, artificial weather modification and other application fields.

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Abstract

The invention discloses an airborne backscattering cloud particle detecting instrument, a meteorological detecting device and a cloud particle detecting method. The airborne backscattering cloud particle detecting instrument comprises a laser emitting module, a backscattered light detecting module and a signal detecting and processing module, wherein a laser light beam of the laser emitting moduleis changed into circularly polarized light through a circular polarizer, and is converged to a to-be-detected cloud particle via a first focusing lens; scattered light is changed into parallel lightthrough an optical 4f system, is split into two beams of linearly polarized light S and P via a quarter-wave plate, then is beam-split into the mutually perpendicular light S and P through a polarization beam splitting prism, and then is converged to the signal detecting and processing module by respective corresponding light S focusing lens and light P focusing lens; detected signals are sent bythe signal detecting and processing module to a signal amplification circuit respectively to be amplified, and then is subjected to sampling analysis by a signal collecting and processing circuit to determine the phase state and size which are corresponding to the to-be-detected cloud particle. The airborne backscattering cloud particle detecting instrument is used for solving the disadvantage that the phase state and size of a cloud particle cannot be accurately distinguished in a high-concentration circumstance.

Description

Technical field [0001] The invention belongs to the technical field of cloud particles, and specifically relates to an airborne backscattered cloud particle detector, meteorological detection equipment and cloud particle detection method suitable for airborne use and capable of distinguishing the phase state of cloud particles. Background technique [0002] Analyzing the particle size scale spectrum and phase state information of the particles in the cloud, that is, distinguishing whether it is a small water droplet or a small ice crystal, is of great significance in cloud physics science research. [0003] The detection principle of detecting the phase state of particles through the backscattered light characteristics of cloud particles is based on the polarization characteristics of light and the scattering characteristics of particles to laser light. According to the theory of polarization scattering, the backscattered signal of linearly polarized light by spherical particles in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02G01W1/00
CPCG01N15/0205G01N15/0211G01W1/00
Inventor 伍波
Owner CHENGDU UNIV OF INFORMATION TECH
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