| 摘要 |
PURPOSE:To perform control which receives less influences from external irregular lights, by providing two projectors and two light-reception detectors at the front and rear sides on one diagonal line of a car body in the direction perpendicular to the advancing direction of the car and performing the control by irradiating and detecting one side edge of a light reflecting tape by means of each set of the projector and detector. CONSTITUTION:Projectors 3 and 4 which irradiate both edges 21 and 22 of a light reflecting tape and light-reception detectors 5 and 6 which receive reflecting lights are provided at the front and rear sections on one diagonal line of the car body of an unmanned carrier car 1 in the direction perpendicular to the advancing direction of the car 1. A semiconductor position detector is composed of resistance layers pro vided on both surfaces of a high-resistance silicon substrate and N+layer and each layer is connected with both right and left electrodes and a common electrode, respec tively. When the distance between the right and left electrodes and the distance be tween an optical beam made incident on the resistance layers and an electrode 51 are designated as l and x, respectively, the electric currents fetched by the right and left electrodes respectively become as follows: IA=IO(l-x)/l and IB=IOx/l. By using the currents IA and IB, the incident position of the optical beam can be known. |
