Abstract
Many bridges had been constructed during the steep economic growth age. Presently, dealing with the deterioration of those bridges and maintaining them have become very important. Using robots for the bridge inspection to aim at the labor saving and lowering the cost is hoped for the management and maintenance of many old bridges because the conventional method will intensify the strains on the economy. We had created a four-wheel driving robot for trial purposes that can inspect cracks and corrosion in steel bridge substructures. In this study, we added the improvement to the size, the turning ability and the controller of the robot. We have confirmed better results than an old-type robot in the experiment concerning whether the robot can finish the running in a variety of exanimation courses.
