Development of a laser scan method to decrease hidden areas caused by objects like pole at whole 3-D shape measurement

The authors are researching about Three dimensional mapping using mobile robot and 3-D laser scanner. We developed 3-D laser scanner which can measure whole 3-D shape with a combination of 2-D laser scanner and Pan-Tilt base. However, measuring surrounding areas using the scanner on mobile robot, there are some areas where can´t measure whole 3-D shape caused by overview camera and wireless LAN´s aerial mounted on a robot. In this paper, 3-D laser scanner can measure uniform and whole 3-D shape, which tilts constant value around pitch axis and then rotates one revolution around yaw axis. We propose measuring method that decrease effects of hidden objects by making offset between 2-D laser scan plane and pitch axis.