基于国产FPGA芯片的连续变焦红外镜头齐焦性同步补偿控制  

Synchro Parfocalization Feafures Compensation Control for Continuous Zoom Infrared Lens Based on Domestic FPGA Chip

作　　者：雷志雄[1] 洪普[1] LEI Zhi-xiong;HONG Pu(Huazhong Institute of Electro-Optics-Wuhan National Laboratory for Optoelectronics,Wuhan 430223,China)

机构地区：[1]华中光电技术研究所—武汉光电国家研究中心,湖北武汉430223

出　　处：《光学与光电技术》2022年第3期113-118,共6页Optics & Optoelectronic Technology

基　　金：国家重大科学仪器设备开发专项(2013yq290489)资助项目

摘　　要：针对连续变焦红外镜头不同温度下的齐焦性问题,根据连续变焦红外镜头的齐焦性拟合补偿曲线,提出一种同步控制运动方法,通过采用主从协同运动,路径规划,轨迹分解、合成,将变焦运动与补偿运动结合在一起。再经过预测补偿、同步采样和插补算法,快速完成补偿运动。此外,采用节根节点校准及位置耦合方式,减小补偿累积误差。在变焦电机与补偿电机协同作用下,保证红外镜头在不同环境温度下,都能实现变焦匀速运动时,齐焦性在指定的精度范围内,从而实现红外镜头的齐焦性。能有效弥补连续变焦红外镜头因连续工作或温度变化导致齐焦性不足的问题。Aiming at the problem of parfocalization feafures of continuous zoom infrared lens at different temperatures,a synchronous motion control method is proposed according to the compensation curve fitting of parfocalization feafures of continuous zoom infrared lens.The zoom motion and the compensation motion are combined by using master-slave cooperative motion,path planning,trajectory decomposition and synthesis.After prediction compensation,synchronous sampling and interpolation algorithm,the compensation motion is completed quickly.In addition,the root node calibration and position coupling are used to reduce the cumulative compensation error.Under the cooperative action of the zoom motor and the compensation motor,it is ensured that the infrared lens can realize the zoom uniform motion at different ambient temperatures,and the focus uniformity is within the specified accuracy range,so as to realize the focus uniformity of the infrared lens.It can effectively make up for the lack of focus uniformity of continuous zoom infrared lens due to continuous operation or temperature change.

关 键 词：同步控制 路径规划 根节点校正 采样位置耦合 插补算法 

分 类 号：TH74[机械工程—光学工程]