| 摘要 |
PURPOSE:To prevent rear-end collision of vehicles by irradiating a guide light while sectioning it along the running route and detecting the presence of a vehicle in the irradiated section when a reply signal comes. CONSTITUTION:A guide light irradiation controller Ai irradiates the guide light fi via a slit Si to a vehicle W. The guide light fi is reflected in a reflection plate Ri, a reflected light vi is received by a photodetector Bi to generate a photodetecting signal Ri. The photodetecting signal Ri is inputted to a succeeding controller Ai+1. The controller Ai+1 uses the signal Ri to detect the presence of the vehicle W in the guide light irradiating section. When the presence of the vehicle is detected, the controller Ai+1 stops the irradiation of the guide light at the adjacent subsequent section to stop the subsequent vehicles in the subsequent adjacent section. Thus, the rear-end collision of vehicles is prevented. |
