Abstract:
Image scanning system is the core sub-system of aerial camera. It requires high scanning accuracy, high scanning frequency, small size, simple structure, otherwise, the image is blur and image frame rate is low. Low-precision scanning mechanism abroad changes the rotary motion into linear scanning movement using rotary motor plus cams, gears, worm and other mechanical transmission mechanism. The image plane scanning system is bulky, has complex structure and low intelligence. It does not match the trends of future camera. Voice coil motor is chosen to produce linear reciprocating motion for the new design high-frequency and high-speed image scanning structure. Image scanning mode was rectangular scanning. In order to achieve high control accuracy and high repetition rate, intelligent control method with continuous force control of VCM was introduced. Image scanning frequency can reach 15 Hz, scanning speed accuracy can be in 0.2%, the linear travel was at least 0.2 mm, linear scanning speed is 103 mm/s. The experimental results shows that it is stronger in robustness, better in adaptability, the quality and effect of control are satisfactory. This result can meet the specific requirements of the project.