| 摘要 |
<p>Apparatus for detecting the quantity of rotation of a rotatably driven rotary shaft, and has the following characteristics. A reduction gear having a reduction ratio of an integer is provided with its input shaft connected to the rotary shaft of a rotational power source. The apparatus is provided in an output shaft system of the reduction gear, and adapted to output a signal of position every time the output shaft has rotated at 360o, and signals of angles of rotation, the levels of which are in accordance with an angle of rotation of the input shaft. One of the signals of angles of rotation and the signal of position are outputted simultaneously to count the quantity of rotation of the rotary shaft on the basis of these signals. Therefore, even if the rotary shaft is rotated a plurality of times in one direction, the quantity of rotation thereof can be accurately detected.</p> |
