Device and method for measuring atmospheric turbulence intensity profile by receiving laser beacon

A laser beacon, atmospheric turbulence technology, applied in measurement devices, radio wave measurement systems, climate sustainability, etc., can solve the problems of uncontrolled measurement paths, large telescope apertures, low spatial resolution, etc. Flexible and adjustable, reliable data, high range resolution

Inactive Publication Date: 2015-10-28
NO 63655 TROOPS OF THE CHINESE PEOPLES LIBERATION ARMY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The temperature pulsation instrument sounding method uses the sounding balloon to hang the temperature pulsation instrument for sounding measurement. This method has high spatial resolution, but because the balloon is affected by the wind, the measurement path is not controlled. In addition, the measurement of a profile The line time is also longer
Microwave radar calculates the intensity of atmospheric turbulence by measuring the backscattering power of the radar signal, but it needs to provide the temperature and humidity on the path, which is time-consuming, and the influence of humidity on the measurement is difficult to deduct, so the accuracy is not high
The measurement principle of sodar is similar to that of microwave radar, but because sound waves are mechanical waves, they can only measure the atmospheric boundary layer, and due to the limitation of sound power, the measurement height is limited
The SCIDAR method obtains the intensity profile of atmospheric turbulence by detecting the correlation of light intensity or phase distribution on a certain area, but requires two light sources separated by a certain distance as beacons, the requirements for beacons are more stringent, and the telescope aperture is required to be larger. Generally above 1m, which brings great restrictions to its application
MASS is a low-resolution atmospheric turbulence intensity profile measurement device, which can only give atmospheric turbulence intensity values ​​at 6 to 7 heights, with low spatial resolution

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  • Device and method for measuring atmospheric turbulence intensity profile by receiving laser beacon
  • Device and method for measuring atmospheric turbulence intensity profile by receiving laser beacon
  • Device and method for measuring atmospheric turbulence intensity profile by receiving laser beacon

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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0020] see figure 1 , a device for receiving laser beacons to measure atmospheric turbulence intensity profiles, including a flat reflector 2 to receive the backscattered light of the laser beacons and reflect it to an off-axis receiving telescope 3, and the light received by the receiving telescope 3 is provided by a triangular The prism 4 is reflected into the subsequent optical path 5, and the subsequent optical path 5 splits the beam and transmits it to the photodetector 6. The photodetector 6 images the received beam and converts the optical signal into an electrical signal. The electrical signal passes through the data acquisition and processing unit 7 Collect and convert into digital signals, and calculate the atmospheric turbulence intensity profile after processing the laser beacon i...

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Abstract

The invention discloses a method and a method for measuring an atmospheric turbulence intensity profile by receiving a laser beacon. The device comprises a flat reflecting mirror for receiving backwards scattered lights of the laser beacon and reflecting received light beams to an off-axis type receiving telescope; lights received by the receiving telescope are reflected by a triangular prism and then enter into a following light path; the following light path splits the light beams and transmits the split light beams to a photoelectric detector; the photoelectric detector images the received light beams and converts light signals into electric signals; the electric signals are subjected to acquisition and conversion of a data acquisition and processing unit, and are converted into digital signals; after the laser beacon images at different distances in the space are processed, the atmospheric turbulence intensity profile can be calculated. The advantages of the method and method for measuring the atmospheric turbulence intensity profile by receiving the laser beacon are that the measurement time is not limited, the range resolution is high, and the obtained data are more genuine and more believable as a spherical wave based calculation method is adopted and a slope matrix is constructed to reflect the atmospheric turbulence intensity.

Description

technical field [0001] The invention belongs to the technical field of optical measuring instruments, and relates to a device and a method for receiving laser beacons and measuring atmospheric turbulence intensity profiles. Background technique [0002] When the laser beam is transmitted in the atmosphere, the fluctuation of the atmospheric refractive index caused by the fluctuation of the atmospheric density will cause the beam transmitted in it to produce beam drift, beam expansion, light intensity flicker, phase fluctuation and other effects, destroying the coherence of the laser beam, seriously Affects the propagation quality of the beam. In atmospheric optics research, the atmospheric turbulence intensity C n 2 It is a basic parameter to characterize the characteristics of atmospheric turbulence. The measured atmospheric turbulence intensity profile can describe the details of the turbulence in the atmosphere finely, thus providing basic parameters for the study of l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/95
CPCY02A90/10
Inventor 强希文宗飞封双连赵军卫吴敏常金勇徐云岫
Owner NO 63655 TROOPS OF THE CHINESE PEOPLES LIBERATION ARMY
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