Design Of Electromagnetic Echo Simulator For Interactive Scene

Electromagnetic echo simulator converts the electromagnetic detector outdoor test task into indoors,which greatly reduces the test cost and has extremely high application value.The current electromagnetic echo simulator's UI interface is simple or even not equipped with human-computer interaction interface,the human-computer interaction experience of testers is very poor.With the development of computer graphics technology,3D scene simulation technology is becoming more and more mature.In order to simulate the real electromagnetic detector application environment and meet the objective requirements of the simulator to generate analog digital echo in real time,this paper has carried out the following research work:(1)The design of 3D virtual scene software.This paper used OSG(Open Scene Graph)3D graphics rendering engine to design a 3D virtual digital earth to simulate electromagnetic detector application scenario based on osgEarth(Open Scene Graph Earth)extension package.In addition to improving the authenticity of the virtual scene based on loading the earth's digital elevation and image data,adding geographic boundaries,and rendering the environment effects,it also adds functions such as earth manipulator,viewpoint control and compass to improve the interoperability of the software.On the basis of the above work,this paper completed the target flight path setting and situation simulation,and it outputs the scene data to the computing platform in real time.(2)The calculation of analog digital electromagnetic echo.In order to complete the echo calculation task with short frame time and large data volume,thanks to the development of heterogeneous computing,based on the OpenCL architecture,this paper completed the real-time calculation of electromagnetic detector digital echo on the CPU-GPU heterogeneous platform.This paper analyzed the computing tasks and designed multi-threading and cache to complete scene parsing,target parameter calculation and other short-time serial tasks on the CPU side.This paper also divided the data on the GPU side to complete the long-time parallel digital echo generation task.This paper completed the function of generating analog digital electromagnetic echo in real-time according to the scene.(3)The design of the returned-display software.In order to verify the correctness of the scene calculation,this paper sent the scene data in the echo calculation software to the returned-display software.The returned-display software is based on the Qt(a C++graphical user interface application development framework)graphical view framework,completing the target 2D track display and target parameter display.This paper combined the 3D scene to verify the correctness of the whole system.At last,this paper tested and verified the function of the whole system,and gave the test results of the three modules.The test results meet the expected requirements.