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分析了大气压力、温度和摄影斜距的变化对航空相机离焦的影响,给出了计算相机离焦量的简易数学方程,介绍了基于高精度硅压力传感器、铂热电阻温度传感器和GPS的数据采集处理的自动调焦系统组成和设计原理,制作完成了系统的硬件电路和软件流程设计,经过光学测试和实际应用证明:这种设计实用可靠,调焦速度快,精度高,完全满足高机动性航空摄影侦察的需要。
The influence of atmospheric pressure, temperature and photography slant distance on the defocusing of aerial camera is analyzed. A simple mathematical equation for calculating the defocusing amount of camera is given. The high precision silicon pressure sensor, platinum thermal resistance temperature sensor and GPS Data acquisition and processing of auto-focus system components and design principles, the production completed the system hardware circuit and software flow design, after optical testing and practical application of proof: This design is practical and reliable, focusing speed, high precision, fully meet the high Needs for mobile aerial photography reconnaissance.