| 摘要 |
The method involves aligning the mutual geometrical two opposing posts, which are fitted with one or more transmitters and transducers. At least one electromagnetic beam (33,33') is directed from the first post to the other post, with a defined alignment with respect to the first post. The point at which the beam meets the other post is determined with respect to a reference point (35,35'), and the mutual alignment of the two posts is adjusted. Preferably, at least two beams are used to adjust the alignment of the posts. The two beams are in opposite directions and spaced apart. The beams may be switched on using a switch, and may turn off automatically after a certain time. |
