基于传感器的自动调焦系统设计

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...

Design of autofocusing system based on sensors

The effect of the change of atmospheric pressure,temperature and oblique photographic distance on being out of focus of aerial camera during aerial photograph is analyzed.The simple maths equation is presented in order to calculate out of focus.The configuration and design principle of autofocusing system for data acquisition and processing based on high precision silicon pressure sensor,platinum resistance temperature sensor and GPS for aerial camera are introduced.The hardware circuit and the software process design are done.The optical measurement and practical application show that the design is practical and reliable.It has high speed and high precision focusing.