Abstract:

GPS is controlled by other country and jammed easily, it is the potential danger to the unmanned aerial vehicle ( UAV) based on GPS. In order to make it land automatically and safely, a novel method of UAV automatic landing’s guidance in all weather is proposed based on the cooperative object that is controlled to radiate infrared on the landing runway (highway or square available) and infrared computer vision. The infrared (8~12 μm) visual system is adopted as the video gathering system by analyzing the permeation ratio of light-wave and atmospheric windows and some experiments.The cooperative object is developed,and its infrared image is better when its temperature is higher 170~200℃ than the temperature of background.Then the traditional moment invariant recognition algorithm is studied to recognize the cooperative object,but the reliability of recognition is low.For improving reliability and accuracy,a sort of recognition algorithm based on direction code for the cooperative object is put forward.The experimental results show that the time consumption of this new recognition algorithm is 96% the time consumption of the traditional moment invariant recognition algorithm,and the recognition reliability is improved obviously.

Key words: UAV,  , all , weather,  , automatic , landing&rsquo, s , guidance,  , infrared , image,  , computer , vision