Laser radar based water-in-cloud raman scattering full-spectrum measurement system and method thereof

A technology of Raman scattering and laser radar, which is applied in the directions of Raman scattering and material excitation analysis, and can solve problems such as laser radar systems that do not yet exist

Inactive Publication Date: 2013-02-20
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there is no lidar system that d

Method used

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  • Laser radar based water-in-cloud raman scattering full-spectrum measurement system and method thereof
  • Laser radar based water-in-cloud raman scattering full-spectrum measurement system and method thereof
  • Laser radar based water-in-cloud raman scattering full-spectrum measurement system and method thereof

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Embodiment 1

[0052] This embodiment provides a lidar-based Raman scattering full-spectrum measurement system for water in clouds, the structure of which is as follows: figure 1 As shown, it includes a laser emitting device, a laser receiving device, a spectral resolution device, a photoelectric detection device, a data acquisition device and a double pulse trigger device.

[0053] The laser emitting device is arranged below the measured cloud, and includes a laser 1, a beam expander 2 and a reflector 3, and the centers of the laser 1, the beam expander 2 and the reflector 3 are arranged on the same straight line superior. The laser pulse emitted by the laser 1 enters the entrance of the beam expander 2, and the beam expander 2 transmits the laser pulse to the reflector 3, and the reflector 3 transmits the laser pulse vertically to In the air, and hit the measured cloud body. The laser 1 is a Nd:YAG laser, the wavelength of the pulsed laser beam is 355nm, the single pulse energy is 70mJ, ...

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Abstract

The invention discloses a laser radar based water-in-cloud raman scattering full-spectrum measurement system. The system comprises a laser emitting device, a laser receiving device, a spectrum resolution device, a photoelectric detection device, a data collecting device and a double-pulse triggering device, wherein the laser emitting device comprises a laser, a beam expander and a reflector, the spectrum resolution device comprises an optical fiber, an aspherical mirror, a broad bandpass filter, a grating spectrometer and a rotating platform, the photoelectric detection device comprises a photomultiplier which converts optical signals into electric signals, the data collecting device comprises a photon counting card and a computer, and the double-pulse triggering device comprises a sensing triggering module, a single chip microcomputer and a gating device. Simultaneously, the invention discloses a laser radar based water-in-cloud raman scattering full-spectrum measurement method. According to the system and the method, solid water and liquid water in clouds serve as detection objects, the whole system is compact in structure, easy to control and regulate and high in stability.

Description

technical field [0001] The invention relates to a full-spectrum measurement system for Raman scattering of water in clouds, and more specifically, to a full-spectrum measurement system for Raman scattering of water in clouds based on laser radar and a measurement method thereof. Background technique [0002] Lidar and spectroscopy are increasingly used in atmospheric science. So far, the macro-observation technology of clouds has been relatively mature, and there are many methods such as manual observation, ceilometer, all-sky imager, weather radar, and satellite remote sensing. However, there are still relatively few observation methods for the microphysical characteristics of clouds. As far as continuous observation is concerned, millimeter-wave radar is currently recognized as an effective detection device. However, compared with millimeter-wave radar, lidar has more advantages in terms of spatial resolution and mode of action, and lidar has relatively mature technologie...

Claims

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Application Information

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IPC IPC(8): G01N21/65
Inventor 卜令兵吕敏徐中兵丘祖京邵楠清庄一洲张强
Owner NANJING UNIV OF INFORMATION SCI & TECH
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