| 摘要 |
A position transducer in which a sensor moves between two terminal points of a path uses the movement of the sensor to set at least one of the terminal points at the maximum displacement of the sensor in that direction. For example, a slider 28 of a potentiometer is coupled to the motor 32 of the servo-drive via intermediate elements 30. The terminal connectors 34, 36 of the potentiometer are displaceably arranged on the resistor member 26 of the same so that they are pushed away from each other by the slider 28 during its very first displacement, and then remain at these positions. A system of this nature results in an automatic adaptation of the position transducer to the path length of the sensor coupled to the servo-drive. The transducer can be a differential capacitor, a differential inductor or a photodetector variably shielded from a light source. <IMAGE> |
