| 摘要 |
The system includes a stationary optical waveguide (1) with partly transparent surface material, positioned lengthways along the moving direction (6) of the unit (7), A light source (3) emits light beams (4) which are detected by one or two fixed light receivers (2,8). As the unit moves, so does the light source and the emitted beams. This ensures the exact position can be established and suitable pre-programmed sets of instructions can be triggered at set positions. |
