Research On The Dynamic Resolution Detection System For CCD Aerial Camera And The Key Technologies

The dynamic resolution of CCD aerial camera is an important index to judge the imaging quality of CCD aerial camera.However,in order to accurately detect this index,the traditional method is to install the CCD aerial camera on the aircraft,so that the CCD aerial camera could take photos at different heights and different speeds.Then the image is analyzed and interpreted.Of course the cost is certainly huge.Therefore,it is necessary to study a dynamic resolution detection system for CCD aerial camera.The aim is to simulate the flying posture of the aircraft on the ground,and to make the CCD aerial camera photograph the specific resolution board,in order to obtain the dynamic resolution.Firstly,the overall design of the dynamic resolution detection system for CCD aerial camera is put forward.Based on this,the key technologies including infinite target simulation technique and linear motion technique are studied.Secondly,the main factors that affect the uniformity of linear motor speed are analyzed.The composite control strategy for linear motion,combining PID control and iterative learning control,is proposed.And S-type acceleration and deceleration curve is added to realize the flexible control of the system.Thirdly,the hardware and software design of the control system is described,and the control interface is written by using LabVIEW.Finally,the testing platform of the control system was set up,and a series of testing experiments were carried out.The experimental results showed that the design scheme satisfied the requirements of the main technical indexes.