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红外辐射面源应用于特定红外特性目标的模拟,各种红外探测、制导系统的外场测试,红外目标源标红外辐射性能基本取决于面源温度场的控制。介绍了大型红外辐射面源系统的主要组成,采用外凸锥型制作辐射源表面以提高红外发射率。采用大功率加热管结合温控仪进行升温控制,通过分析及计算确定了加热系统的功率,并通过CFD仿真进行了冷却系统的风道设计及风扇选型。实验得出大尺寸辐射面温度的稳定性及均匀性均满足设计要求,可在30 min内将辐射面温度均匀控制在[80℃,300℃]范围内,误差小于±1.5℃,可以设定温度以模拟不同的红外特性。
Infrared radiation surface source is applied to the simulation of infrared target, infrared detection and field test of guidance system. The infrared radiation performance of infrared target source basically depends on the control of surface temperature field. The main components of the large-scale infrared radiation surface source system are introduced. The convex surface is used to make the surface of the radiation source to improve the infrared emissivity. The heating system is controlled by high-power heating pipe combined with temperature controller. The power of the heating system is determined through analysis and calculation. The air duct design and fan selection of the cooling system are carried out by CFD simulation. Experiments show that the stability and uniformity of large-size radiant surface temperature meet the design requirements, the radiation surface temperature can be uniformly controlled within [80 ℃, 300 ℃] within 30 min, the error is less than ± 1.5 ℃, can be set Temperature to simulate different infrared characteristics.