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Simple calculation method of target laser scattering characteristics under local irradiation

A calculation method and laser scattering technology, applied in the fields of identification, stealth, and target detection, can solve the problems of complicated operation steps and jaggy target edges, and achieve the effect of simple parameter setting, easy change, and easy laser spot size and irradiation position.

Active Publication Date: 2017-05-31
BEIJING INSTITUTE OF TECHNOLOGYGY
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AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the shortcomings of the existing method for calculating the laser radar scattering cross-section of the target under partial illumination that the operation steps are complicated and the edge of the target is jagged, and provides a simple calculation method for the laser scattering characteristics of the target under partial illumination
[0006] Based on the graphic electromagnetic calculation method and the OpenGL graphics library, the present invention sets the size and position of the viewing volume according to the size of the laser spot irradiated on the target, and can simply and quickly calculate the laser radar scattering cross-section of the target under local irradiation, and solves the problem of the target Problem with jagged edges

Method used

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  • Simple calculation method of target laser scattering characteristics under local irradiation
  • Simple calculation method of target laser scattering characteristics under local irradiation
  • Simple calculation method of target laser scattering characteristics under local irradiation

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Experimental program
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Embodiment

[0062] Embodiment: The transport vehicle (8.5m×3.24m×2.4m) is subjected to simulation calculation of target laser scattering characteristics under partial irradiation.

[0063] (1) Obtain the bidirectional reflectance distribution function of the surface material of the transport vehicle

[0064] Using a comparative measure, using figure 1 The test device shown in is used to test the bidirectional reflectance distribution function of the surface material sample of the transport vehicle, and calculate the bidirectional reflectance distribution function of the surface material sample of the transport vehicle according to the principle formula of the comparative measurement method. Using the cftool tool in Matlab to fit the calculated data, the relationship between the bidirectional reflection distribution function BRDF and the rotation angle x of the surface material sample of the transport vehicle under the condition of a single station is obtained as follows:

[0065]

[0...

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Abstract

The invention discloses a simple calculation method of target laser scattering characteristics under local irradiation, and belongs to the technical field of target detection, recognition, and stealth. By modifying the parameters of view-frustum, the simple calculation of scattering cross-section of a target laser radar under local irradiation can be realized. The method comprises the following steps: at first, obtaining the bidirectional reflectance distribution function of a target surface material; establishing a geometric model of a complicated target; reading the target geometric model file, according to the size and position of an irritation laser spot, setting the parameters of view-frustum; calling an OpenGL function to carry out target rendering and blanking to realize real-time display of a target under local irradiation; and finally obtaining each parameter of a target laser radar scattering cross-section calculation formula to complete the target laser radar scattering cross-section imitation calculation under local irradiation. Compared with the conventional algorithms, the adopted algorithm is easy to operate and is flexible; the size and irritation position of the irritation laser spot can be easily modified; and the target laser radar scattering cross-section imitation calculation can be realized under laser overall / local irradiation.

Description

technical field [0001] The invention relates to a simple calculation method for target laser light scattering characteristics under partial illumination, in particular to a simple calculation method for target laser radar scattering cross section under partial illumination, and belongs to the technical fields of target detection, identification and stealth. Background technique [0002] The target laser scattering characteristic is one of the most important target optical properties, and it is the basis for the laser detection system to detect and identify the target. Studying the laser scattering characteristics of the target, on the one hand, can make the design of the laser detection system reasonable, and better play the performance of the system; [0003] The target lidar scattering cross section is one of the important research objects of the target laser scattering characteristics. It can reveal the target's own attributes, and fully reflect the influence of various f...

Claims

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Application Information

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IPC IPC(8): G01N21/47
CPCG01N21/47G01N2021/4735
Inventor 王茜蒨赵婧彭中
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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