| 摘要 |
An embodiment of the invention extends to a transducer or an interface for converting rotational motion to electrical signals comprising a mechanical actuator which is rotationally moveable in a first direction and in a second direction, and a first and a second electrical component connected to the actuator and arranged so that rotation of the actuator in the first direction causes changes in electrical properties of the first electrical component and rotation of the actuator in the second direction causes changes in electrical properties of the second electrical component. The first and the second electrical components are connected to one or more electrical circuits so that rotation of the actuator in the first and the second directions causes changes in the one or more electrical circuits. In the embodiment, transducer comprises two conductive discs (40,42) on a rotating shaft (14) whose rotation in either direction requires measurement. At the circumference of each disc are electrically conducting hooks (60,62) which form a sliding contact with electrically conducting surfaces (32,34) on a pivoting beam (24) arrangement. As the shaft rotates, the hooks cause the beam to pivot. During this movement, the point of contact between the hooks and conducting surfaces changes as the hooks slide along the conductive surfaces. The change in the resistance of the electrical path is indicative of rotation. |
