| 摘要 |
PURPOSE:To eliminate the influence of an induction noise by providing a moving body with a light source and arranging one terminal of an optical transmission line fitted with a lens which converges the light of said light source along a movement path for said moving body on a ground side. CONSTITUTION:The moving body MB is provided with a signal generation part b1 and the light source a1 driven by it. Then, one-side terminals of numbers of optical transmission paths OPT fitted with lenses LZ for converging the light of the light source a1 to the place where the position of the moving body MB is detected along the movement path for the moving body MB is arranged on the ground side, and those optical transmission lines OPT are connected to a photodetection processing part PRC on the other side. The photodetection processing part PRC discriminates which optical transmission line OPT transmits the light of the light source a1 of the moving body MB to detect the absolute position of said moving body MB. This system eliminates a noise generated on an optical transmission line, so the influence of an induction noise is eliminated. |
