In this paper, the visible and infrared measurement data of different ground scenes are used as the modeling basis to build infrared scene models for typical ground scenes. The infrared spectrum data of GF-5 satellite were used to verify the simulation data of the ground scene that under the same detection conditions. Based on the acquisition of satellite infrared channel calibration data and spectral response curve, the infrared radiation of the interested background is obtained. The solar radiation value and atmospheric transmission (transmittance radiation) under the corresponding detection conditions are calculated. Based on the remote sensing test results, the error statistics of the calculation results of the ground object background infrared model are carried out. The results show that the maximum statistical error between the theoretical calculation results and the remote sensing test results is 29.0%, and the average absolute error of the six bands is 15.2%. From the comparison accuracy of remote sensing test data, the simulation results of the ground scenes simulation model are reasonable and the model has high reliability.
Modern speedboats are widely used in maritime weapons. They have the characteristics of fast speed, small size and strong concealment, and can effectively attack target area. For the detection of infrared waveband, the infrared concealment design of speedboat is of great significance. For the water speedboats, the ship itself is mainly made of aluminum alloy, and driven by diesel engine. According to the analysis of infrared special distribution, the characteristics of high temperature on the hull surface caused by the engine operation are the most prominent radiation characteristics for the infrared detection. Therefore, it is necessary to carry out the design of heat insulation materials on the hull surface to reduce the heat conduction capacity of the engine part to the hull surface. In this paper, based on the analysis of the radiation characteristics of the speedboat itself, the thermal insulation materials with low thermal conductivity are designed for the body part of the engine room, and the temperature and radiation characteristics of the surface of the boat are compared and analyzed. Through comparative analysis, it is found that after the low thermal conductivity material is used in the design, the average temperature reduction at the engine part is 10.2K, the medium wave radiance decreases 21.6%, and the long wave radiance decreases 12.5%. The research on the characteristic stealth of speedboat facing the marine environment has the necessary research value.
The traditional stationary target infrared simulation equipment has the shortcomings: single surface emissivity and unable to simulate the texture details of the target. In this paper, depending on the design of the emissivity of the coating, the simulation algorithm is used to simulate the infrared characteristics of the stationary target. After optimizing the simulation scheme, the effect of simulating the solid contour and detail texture characteristics of stationary target is achieved. It provides practical simulation materials for the development of infrared characteristic simulation equipment of stationary target.The simulation effect evaluation software is constructed through the evaluation method of image similarity. The simulation similarity results of infrared characteristics under different configuration schemes are given. The quantitative comparison and analysis about infrared characteristics of the simulated stationary target and real target is realized, which provides the evaluation basis for simulation effect.
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