| 摘要 |
A vibration sensor includes a permanent cylindrical magnet, coil and two cylindrical springs. A permanent bar rectangular magnet is used as the permanent cylindrical magnet, and two pairs of coils placed at the opposite sides of the permanent bar rectangular magnet are used as coil. The pairs of coils are displaced one with respect to another by distance equal to the length of the permanent bar rectangular magnet, the coils are connected in series matched, and the starts and the finishes of the coils placed at one side of the permanent bar rectangular magnet are connected to differentiator. |
