| 摘要 |
The invention relates to a rotational speed measuring device and to a method for measuring the rotational speed on coaxially arranged drive shafts, from which a first drive shaft is formed as an inner shaft (2) in a second drive shaft embodied as a hollow shaft (1). Said hollow shaft (1) has at least one opening (3 - 5) and a rotational speed transmitter (6) is arranged on the inner shaft (2) and can be detected by the opening (3 - 5) of the hollow shaft (1). A rotational speed sensor (7) is arranged on the outer side of the hollow shaft (1), said sensor can pick up the rotational speed on the rotational speed transmitter (6). |
