All-time overall height atmospheric sounding and observing laser radar

A technology of atmospheric detection and laser radar, which is applied to measuring devices, climate sustainability, and radio wave measurement systems, etc. Difficult to launch synchronously and other problems to achieve the effect of improving detection ability and application range, convenient use and maintenance, and reliable work

Inactive Publication Date: 2009-09-02
WUHAN INST OF PHYSICS & MATHEMATICS CHINESE ACADEMY OF SCI
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This system consisting of multiple lasers, multiple telescopes and many detection equipment is expensive, complicated to adjust and difficult to maintain
On the one hand, it is difficult for multiple lasers to transmit synchronously, which will cause the echo signals of multiple lidars to be asynchronous in time; on the other hand, multiple laser beams will have a certain deviation in space, resulting in The wave signal is not spatially consistent

Method used

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  • All-time overall height atmospheric sounding and observing laser radar

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Effect test

Embodiment 1

[0021] The lidar for full-height atmospheric detection at all-day time is composed of a laser emitting part 1, an optical receiving part 2, and a signal detecting part 3. Among them:

[0022] The optical receiving part 2 is composed of a low-altitude telescope 210, a first optical fiber 211, a motorized biaxial translation stage 212, an upper-altitude telescope 200, a second optical fiber 221, and a third optical fiber 231. The low-altitude telescope 210 is placed vertically, the electric dual-axis translation stage 212 is arranged in parallel at the focal plane of the low-altitude telescope 210, the optical fiber head at one end of the first optical fiber 211 is vertically installed in the center of the electric dual-axis translation stage 212, and the end face of the optical fiber head is located at the focal plane. On a plane; the high-altitude telescope 200 is placed vertically, 3-8 meters away from the low-altitude telescope 210, and the fiber ends of the second optical fiber...

Embodiment 2

[0038] The low-altitude telescope 210 or the high-altitude telescope 200 in Embodiment 1 adopts a reflecting telescope, a refracting telescope, a reflex telescope or a combined telescope.

Embodiment 3

[0040] The narrowband filter in Embodiment 1 adopts a composite filter, a birefringent filter, or an atomic filter.

[0041] The working process of the present invention is:

[0042] The 589nm laser emitted by the dual-wavelength transmitter of the laser emission part excites 80-110 km sodium layer fluorescence, and the echo light is focused to the third optical fiber entrance by the high-altitude telescope and sent into the sodium layer fluorescence channel to obtain 80-110 km sodium layer fluorescence. Sodium atom number density and fluctuation information; the 532nm laser emitted by the dual-wavelength transmitter excites 30-80 kilometers of atmospheric Rayleigh scattering, and the echo light is focused to the second fiber entrance by the high-altitude telescope, and then sent into the Rayleigh scattering channel to obtain 30- 80 kilometers of atmospheric density, temperature, fluctuations and other information; the 532nm laser emitted by the dual-wavelength transmitter also si...

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Abstract

The invention discloses an all-time overall height atmospheric sounding and observing laser radar, and relates to a laser radar which can sound and observe various atmospheric parameters from the near ground to the height 110 kilometers above the ground. The laser radar consists of three parts, namely a laser emitting part (1), an optical receiving part (2) and a signal detection part (3). By the organic combination of dual wavelength emission, simultaneous three channel reception, narrow band filter and reception-emission combined adjusting and the like, the all-time overall height atmospheric sounding and observing laser radar is formed. The laser radar has the advantages that: at night, the radar can simultaneously sound and observe the atmospheric parameters in the height range of 1 to 110 kilometers; and in the daytime, the radar can simultaneously sound and observe the atmospheric parameters in two sections of height ranges of 1 to 60 kilometers and 80 to 110 kilometers; moreover, the radar also has the advantages of scientific technical proposal, high systematic integration level, good automaticity, reliable operation and convenient use, and provides a high-performance sounding way for research of the medium-upper atmosphere and environment monitoring of the medium-upper atmosphere.

Description

Technical field: [0001] The invention relates to a lidar, in particular to a full-elevation lidar for detecting a wide range of atmospheric layers from near the ground to 110 kilometers, and a full-time lidar for continuous 24-hour uninterrupted atmospheric detection. Background technique: [0002] From the near ground to the 110-kilometer high-altitude atmospheric layer, it is an important link in the Sun-Earth relationship chain and an important research field in space physics and atmospheric science. Lidar has the advantages of high temporal and spatial resolution, high detection sensitivity, distinguishable detection species and no atmospheric detection blind zone, etc., and is especially suitable for the detection of multiple atmospheric parameters in this layer. [0003] Atmospheric detection lidar is usually 30 kilometers as the boundary, divided into low-altitude detection lidar and high-altitude detection lidar. There are two main types of high-altitude detection lidar: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/95
CPCY02A90/10
Inventor 龚顺生程学武李发泉杨国韬王继红窦贤康薛向辉杨勇李勇杰王嘉珉贾汉春
Owner WUHAN INST OF PHYSICS & MATHEMATICS CHINESE ACADEMY OF SCI
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