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Multifunctional large airflow field two-dimensional imaging detection device and detection method

A two-dimensional imaging and detection device technology, which is applied to measurement devices, uses multiple variables to indicate weather conditions, meteorology and other directions, and can solve the problem of inability to achieve detection, lack of atmospheric optical turbulence, transmittance and spatial shock waveform quantification It solves the problems of comprehensive measurement function, etc., to achieve the effect of unlimited field of view, unlimited detection distance, and wide application.

Pending Publication Date: 2021-03-16
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Application Information

AI Technical Summary

Problems solved by technology

Limited by traditional methods and technical conditions, it is impossible to detect the atmospheric turbulence field on the scale of hundreds of meters to hundreds of kilometers in the free atmosphere, let alone the quantitative and comprehensive measurement functions of atmospheric optical turbulence, transmittance and space shock wave waveform

Method used

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  • Multifunctional large airflow field two-dimensional imaging detection device and detection method
  • Multifunctional large airflow field two-dimensional imaging detection device and detection method
  • Multifunctional large airflow field two-dimensional imaging detection device and detection method

Examples

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Effect test

Embodiment 1

[0100] Example 1: Detect the flow formed by heating air from a heat source such as an electric soldering iron.

[0101] According to the multi-functional atmospheric flow field two-dimensional imaging detection device described in the technical solution of the present invention, it detects the flow formed by heating the air by a heat source such as an electric soldering iron. The specific implementation steps are: ①Use A4 paper or other diffuse reflection paper to print a background pattern with Gaussian white noise texture, and paste it on a flat object; ②Place the CCD imaging system 2 meters away, and make the lens point vertically On the surface of the paper, adjust the focal length of the lens and focus; ③Put the electric soldering iron directly under the middle of the lens and the paper, and turn on the power; ④Start the image acquisition and processing software, run the optical flow algorithm, and observe the flow of hot air from the monitor.

Embodiment 2

[0102] Embodiment 2: Detect the shock wave generated by the spark discharge and its diffusion process.

[0103] According to the multifunctional atmospheric flow field two-dimensional imaging detection device described in the technical solution of the present invention, the shock wave generated by the spark discharge and its diffusion process are detected. The specific implementation steps are: ①Use A4 paper or other diffuse reflection paper to print a background pattern with Gaussian white noise texture, and paste it on a flat object; ②Place the CCD imaging system 2 meters away, so that the lens points vertically On the surface of the paper, adjust the focal length of the lens and complete the focus; ③ Place the high-voltage discharge module between the lens and the paper and power it on; ④ Turn on the image acquisition and processing software, run the optical flow algorithm, and observe the high-voltage discharge excitation shock wave and its propagation phenomenon on the dis...

Embodiment 3

[0104] Embodiment 3: detecting atmospheric turbulence on a 1 km path.

[0105] According to the multifunctional atmospheric flow field two-dimensional imaging detection device described in the technical solution of the present invention, the atmospheric turbulence on the 1km path is detected. The specific implementation steps are: ① paste 1 square meter microcrystalline prism reflective film on the wall 1km away or place it vertically on a hard backboard 1km away; ② turn on the laser, adjust the laser emission power, divergence angle and irradiation ③Adjust the CCD imaging lens so that the image formed by the reflective target surface is located in the center of the CCD target surface; ④Open the image acquisition and processing software to display the dynamic changes of the laser spot and run the laser spot Processing algorithm to obtain laser scintillation index, spot centroid, turbulence intensity and internal scale parameters, etc.

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Abstract

The invention discloses a multifunctional large airflow field two-dimensional imaging detection device and method. The device comprises a camera, a lens, an optical adjustment frame, a laser, an inclined reflector, an optical flat plate, a two-dimensional rotary lifting platform, a movable base, a computer data acquisition and processing system, an illumination light source and a background screen. A laser is used as an illumination light source, a corner reflection array, a microcrystalline prism reflective film or a natural target background is used as a cooperative target, and two-dimensional imaging detection of an atmospheric flow field and flow display and quantitative measurement of transparent fluid are realized by combining laser shadow and background schlieren technical principles. The multifunctional large airflow field two-dimensional imaging detection device and method have the advantages that hardware is simple and easy to implement, the algorithm speed is high, precisionis high, quasi real-time performance is achieved, the device and method can be applied indoors and outdoors, the view field size and detection distance are not limited, functions are diversified, andapplication is wide.

Description

technical field [0001] The invention relates to the technical field of atmospheric optics and fluid detection, in particular to a multifunctional atmospheric flow two-dimensional imaging detection device and detection method for atmospheric flow display and quantitative measurement. Background technique [0002] The atmosphere is a transparent fluid that exists widely on the earth and is closely related to human survival and production activities. Atmospheric turbulence is an important form of motion in the atmosphere. Its existence significantly enhances the vertical and horizontal exchange of momentum, heat, water vapor, and pollutants in the atmosphere, which is far greater than the exchange intensity of molecular motion. The law of atmospheric turbulent motion is a scientific problem that is generally concerned by physics, meteorology, astronomy, and industrial and agricultural production but has not yet been fully resolved. It still needs to develop advanced measurement...

Claims

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Application Information

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IPC IPC(8): G01N21/27G01W1/02
CPCG01N21/27G01W1/02
Inventor 梅海平任益充张俊昕沈刘晶黄印博饶瑞中
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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