A Dynamic Sea Surface Laser Pulse Beam Echo Simulation Method

A technology of laser pulse and simulation method, which is applied in the field of research on target and ambient light scattering characteristics, can solve problems such as difficult to grasp the mechanism and law, undisclosed laser pulse echo simulation method, and inability to use dynamic sea surface echo simulation, etc., to achieve saving human effect

CN103472443BInactive Publication Date: 2015-10-21SHANGHAI RADIO EQUIP RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2015-10-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for dynamic sea surface laser pulse wave beam echo simulation. The method for dynamic sea surface laser pulse wave beam echo simulation comprises the following steps that according to a sea spectrum statistic model, a dynamic sea surface is generated by means of the reverse-FFT technology, and the parameters such as the wind speed, the wave height and the sea wave period are considered through the model; space energy distribution and the pulse shape of each emitted laser wave beam are measured, space-time distribution of any laser wave beam is obtained through fitting, and section spatial light intensity distribution at any distance is determined based on energy conservation; a laser radar wave beam back scattering echo radar equation is established based on the radiometry, rough surface processing is conducted on a water surface element, and the water surface element is expressed through a bidirectional reflection distribution function; drawing, coloring, rendering, real-time animation, hidden-line elimination and clipping of the scene are completed based on a computer graphic base OpenGL. The method for dynamic sea surface laser pulse wave beam echo simulation can be applied to different sea condition model machine dynamic intersection virtual experiments, facilitate development of sea surface pulse echo scattering mechanism study, and save a large amount of cost.
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Description

technical field

[0001] The invention relates to the research field of target and ambient light scattering characteristics, in particular to a laser pulse-echo simulation technology for arbitrary beams on rough sea surfaces. Background technique

[0002] In the development process of the short-range laser radar system, it is necessary to establish a sea background echo simulation model to provide the necessary theoretical basis for the research of data acquisition, feature extraction, control and identification of the echo characteristics of maritime targets. At present, the development of short-range laser radar systems relies on a large number of sea experiments, which consumes a lot of manpower and material resources, and it is difficult to grasp the mechanism and laws.

[0003] Among the retrieved domestic and foreign published documents, there are papers based on the Cox-Munk model of the sea surface slope that introduce the reflection model of the Gaussian beam on the s...

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Embodiment Construction

[0020] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings.

[0021] Simulation method principle of the present invention is as follows:

[0022] Such as figure 1 Shown is the flow chart of the emulation of the dynamic sea surface laser pulse beam echo in the present invention, based on radiometrics, the pulse beam laser radar equation is established, the equation considers the scattering effect of sea water, and the surface element scattering model is characterized by the Torrance-Sparrow two-way reflection distribution function model; Based on the sea spectrum model and inverse FFT technology to complete the dynamic sea surface generation; use computer graphics technology to complete scene rendering, blanking, and clipping.

[0023] The specific steps of the simulation are as follows:

[0024] Step 1: Use an optical waveform measuring instrument to obtain the discrete data of the spatial intensity distributio...