| 摘要 |
PURPOSE:To ensure an automatic traveling control for preventing a rear-end collision by expanding the light projecting area of a light projecting means and the light receiving area of a light receiving means, only toward the inside of a curved route. CONSTITUTION:The light receiving means 3 and the light projecting means 4 are provided at the front end central part and the rear end part of a self-traveling car respectively, and further, a detecting means 6 to read traveling direction change information, which a body 5 to be detected, installed beside the traveling route, has, is provided at it. For instance, when the detecting means 6 detects the pattern No.3 body 5 to be detected, installed beside the traveling route at the vicinity of the start end of the right handed curve, a switch circuit is switched so as to operate the phototransistors 3C, 3R and the light emission diodes 4C, 4R of the central and the right side parts, and the light receiving area of the light receiving means 3 and the light projecting area of the light projecting means 4 come to a state R that they are expanded in a right direction. Thus, the light receiving means 3 of the succeeding self-traveling car can surely detect a light beam form the projecting means 4 of the preceding self-traveling car, and the succeeding self-traveling car stop or decelerate automatically, and the rear-end collision can be avoided. |
