Mitsubishi Electric Corp., a supplier of air-to-air missiles to Japan's armed forces, is adapting technologies it originally developed for military use to help self-driving cars detect obstacles and avoid collisions. Components such as millimeter-wave radars, sonars, sensors and cameras -- some of which were developed to guide missiles -- are being adapted for use in self-driving vehicles that will hit the roads by 2020, Katsumi Adachi, senior chief engineer at Mitsubishi's automotive equipment division, said in an interview.