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Tropospheric atmospheric temperature profile measurement method, device and control method

A technology of atmospheric temperature and measurement method, which is applied in the field of atmospheric detection, can solve the problems of large pulse energy time control and the inability to clarify the position of laser scattering points, etc., and achieve the effects of improving ability, simple calculation, and fast data acquisition

Active Publication Date: 2019-09-10
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

[0004] In a series of studies on atmospheric Rayleigh-Brillouin scattering, the atmospheric backward Rayleigh-Brillouin scattering signals usually detected by continuous lasers are accumulated from the scattering signals at different heights, although the scattering signals are enhanced intensity, but the location of the laser scattering point cannot be determined
In addition, another widely used method to measure the atmospheric temperature profile is to use a pulsed laser to detect the 180° backward echo signal at a certain height, and then obtain physical information such as atmospheric temperature, pressure, and wind speed at that point, but this The method of temperature measurement requires large pulse energy and precise time control

Method used

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  • Tropospheric atmospheric temperature profile measurement method, device and control method

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Embodiment 1

[0048] Embodiment 1: a preferred implementation case of the present invention is enumerated below (referring to figure 1 ). Tropospheric atmospheric temperature profile measuring device, in which the Rayleigh-Brillouin scattering signal generated by the interaction between the laser light emitted by the laser source 1 and the atmospheric gas molecules, the Rayleigh-Brillouin scattering signal returned from point A is sent by the receiving system 2 (Schmidt-Cassegrain telescope) after receiving (the direction of the detection signal is always perpendicular to the receiving system 2), it is transmitted to the first fiber coupler 6 through the optical fiber 5, and the stray light in the environment is filtered out by the optical filter 7, Then collimate and filter through the spatial collimation filter system composed of two convex lenses 8, 9 and slit 10, and then the scattered signal is frequency-identified through the F-P scanning interferometer 11 (SA210-3B, THORLABS), and pa...

Embodiment 2

[0049] Embodiment 2: another preferred implementation case of the present invention is enumerated below (referring to figure 2 ). The device for measuring the tropospheric atmospheric temperature profile, the single-chip microcomputer 19 adjusts the angle by controlling the driver 21 (RD-023MS, RORZE) to drive the motor 22 (56B YG250B), and the motor 22 controls the two-dimensional turntable 4 to realize the movement. The angle value is read into the single-chip microcomputer 19, and compared with the angle value set by the motor 22, if the given angle value and the angle value read back are within the allowable range of deviation, the motor 22 stops adjusting. Others are the same as in Example 1.

[0050] image 3 It is the atmospheric Rayleigh-Brillouin scattering spectrograms of 1km, 4km, 7km and 10km respectively obtained by simulation with a wavelength of 355nm in the present invention. In practice, the corresponding actual atmospheric temperature can be obtained from...

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Abstract

The invention discloses a tropospheric atmospheric temperature profile measurement method, device and control method. The position of the receiving system is controlled by a single-chip microcomputer to change the detection angle of the receiving system, and the returned Rayleigh-Brillouin scattering signal is received at the detection angle, and Based on the Rayleigh-Brillouin scattering theory to invert the temperature, combined with the horizontal distance between the receiving system and the laser emitting device, the vertical height of the receiving system from the ground and the detection angle, according to the geometric theory, the specific height information of the scattering signal is obtained. Finally, the temperature profiles of the atmospheric troposphere at different altitudes are obtained. The present invention has the advantages of uniqueness, fast data acquisition, and simple calculation, and effectively solves the problem that it is difficult to obtain height information from the measured atmospheric spontaneous Rayleigh-Brillouin scattering spectrum using a continuous laser; it improves the efficiency of receiving scattered signals Capability; with the advantages of high accuracy and spatial resolution.

Description

technical field [0001] The invention relates to atmospheric detection technology, in particular to a method, device and control method for measuring tropospheric atmospheric temperature profile based on Rayleigh-Brillouin scattering. Background technique [0002] Atmospheric temperature is an important meteorological parameter in atmospheric science research. According to the changes in the vertical direction of the physical properties such as the composition, temperature, and density of the entire earth's atmosphere, the atmosphere is divided into five layers in the vertical direction, and the temperature change characteristics of each layer are different. There are characteristics. Among them, the tropospheric temperature is most affected by the ground, and the upper bound varies with latitude and season, so the precise measurement of the temperature profile in this layer has research significance. [0003] With the development of atmospheric detection technology, Rayleig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K11/32
CPCG01K11/32G01K11/322
Inventor 吴涛杨传音胡蓉菁何兴道
Owner NANCHANG HANGKONG UNIVERSITY
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