| 摘要 |
PURPOSE:To set freely an operation course by using a means for avoiding an interference for avoiding the interference of optical transmitters to each other so as to enable to use these transmitters commonly in plural mobile stations. CONSTITUTION:A matter to be carried is sent to a mobile station 22 at a gathering station 18 by an unmanned carrier 16 along a carrying route decided by a fixed guide line 30. An optical transmitter 32 is set to the carrier 16 in parallel to the front-rear direction of the carrier. While another optical transmitter 34 is set at the station 18. Then optical signals are transmitted and received between both tranmitters for transfer of information. In this case, eithe an optical transmitter driver 42 is provided or a bending part is formed to the carrying route in order to avoid the interference between both transmitters when the carrier 16 passes a place near the transmitter 34 at the station 18. |
