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基于有限元热分析方法,建立了不同形状的黑体空腔传感器模型,并对其腔体发射率进行求解,同时讨论了腔体开口、腔长、腔口与接收面之间的距离、材料自身的发射率等参数对腔体发射率的影响,通过对各种形状黑体空腔的发射率比较,得出最佳的黑体空腔设计方案。仿真结果表明,改变影响腔体几何结构的各参数时,黑体空腔腔体发射率也随之变化,当黑体空腔为圆台-圆台形,且腔体开口较小、腔体长度较长、腔口与接收面之间的距离较远、材料自身的发射率较大时,腔体发射率较高。
Based on the finite element method, a blackbody cavity sensor model with different shapes was established and its cavity emissivity was solved. The cavity opening, cavity length, distance between the cavity mouth and the receiving surface, the material itself The emissivity and other parameters on the cavity emissivity. Through comparing the emissivity of various shapes of blackbody cavity, the best blackbody cavity design is obtained. The simulation results show that when changing the parameters that affect the geometric structure of the cavity, the emissivity of the blackbody cavity cavity also changes. When the blackbody cavity is a truncated cone-truncated cone and the cavity opening is small, the cavity length is longer, The distance between the mouth of the cavity and the receiving surface is far, and the emissivity of the cavity is higher when the emissivity of the material itself is larger.