Abstract: The contact structure includes a first contact, a second contact, a first contact arm and a second contact arm. In an embodiment, the first contact arm includes at least two spring plates, arranged one on top of another and fixed at one end. The second contact is located on the second contact arm. The first contact is located on the spring plate, on a side of the first contact arm relatively closer to the second contact arm. The at least two spring plates, under a driving action, experience elastic deformation which causes the first contact and the second contact to come into contact with each other. The switch apparatus includes at least one driver and the contact structure of an embodiment. An embodiment of the present solution can reduce the number of contacts in a contact structure.

Abstract: A rotation angle measuring apparatus and method are provided for measuring a rotation angle of a moving disk relative to a stationary disk, the moving disk being configured to rotate about an axis and the stationary disk being arranged opposite the moving disk. A magnet is arranged on the moving disk. A first magnetic sensor is arranged on the stationary disk, the first magnetic sensor generating an angle signal under the action of the magnet as the moving disk rotates. An incremental rotation angle of the moving disk is determined on the basis of an output of the receiving region, a period of the static electric field is determined on the basis of an angle signal generated by the first magnetic sensor, and an absolute rotation angle of the moving disk is determined on the basis of the period of the static electric field and the incremental rotation angle.

Abstract: A rotation angle measuring apparatus and method are provided for measuring a rotation angle of a moving disk relative to a stationary disk, the moving disk being configured to rotate about an axis and the stationary disk being arranged opposite the moving disk. A magnet is arranged on the moving disk. A first magnetic sensor is arranged on the stationary disk, the first magnetic sensor generating an angle signal under the action of the magnet as the moving disk rotates. An incremental rotation angle of the moving disk is determined on the basis of an output of the receiving region, a period of the static electric field is determined on the basis of an angle signal generated by the first magnetic sensor, and an absolute rotation angle of the moving disk is determined on the basis of the period of the static electric field and the incremental rotation angle.