轻量化双目头戴夜视系统壳体结构可靠性设计

Reliability Design of Shell Structure for Lightweight Binocular Head-mounted Night Vision System

摘要:

针对固态成像型头戴夜视系统大视场、轻量化需求,对双目头戴夜视系统进行了物镜和目镜光学系统及机械装配结构设计,选用高强型碳纤维环氧树脂作为夜视系统壳体材料,利用Solid Works仿真软件优化设计了一款夜视系统壳体结构,并对壳体在极寒和高热条件下的热稳定性进行了有限元分析。仿真实验结果表明,在-40和50℃两种极端温度情况下夜视系统壳体的热应力均小于材料的屈服强度,最大应变对光学系统成像质量、显示性能和机械结构造成的影响极为有限,从而验证了壳体结构良好的耐温性和可靠性。

Abstract:

Aiming at the large field of view and lightweight requirement of solid imaging head-mounted night vision system, the optical system and mechanical assembly structure of binocular head-mounted night vision system were designed. Then, a high-strength carbon fiber epoxy was used for the shell material of the night vision system, and a new shell structure was optimized by Solid Works software. Finally, the thermal stability of the shell under extreme cold and high heat conditions was analyzed by finite element method. The simulation results show that the shell thermal stress of the night vision system is less than the yield strength of the material under the extreme conditions of -40℃ and 50℃. Moreover, the maximum strain has little effect on the imaging quality, display performance and mechanical structure of the optical system. The conclusion proves that the shell structure has good temperature resistance and reliability.