Arrangement for determining a number of revolutions of a rotatably mounted shaft and method for determining a number of revolutions of a rotatably mounted shaft

摘要

Arrangement for determining a number of rotations of a rotatably mounted shaft, wherein a permanent magnet is non-rotatably connected to the shaft, wherein the signal generated by a permanent magnet in operative connection with the microgenerator signal voltage is supplied to an energy buffer via a rectifier to a capacitor, wherein a memory (3) for Storage of the number of revolutions is supplied from the energy buffer, wherein the signal voltage of the micro generator is supplied to a supplied from the energy buffer counting logic, which is connected to the memory (3) for reading the respective old number of revolutions and for storing the newly determined number of revolutions, the memory (3) is long-term stable and / or designed in FRAM technology, wherein the permanent magnet is arranged in the sensitive region of the microgenerator, wherein an angle sensor (5) by means of a signal line to a computer (14) is connected to determine the rotational position, in particular the rotation angle of the shaft, wherein by the computer (14) the voltage applied to the energy buffer (6) is evaluated, the computer (14) having a means for evaluating the voltage applied to the energy buffer (6) is connected via a data exchange connection, wherein the Angle sensor (5) and the computer (14) are powered by a voltage source from which the counting logic and the energy buffer are not supplied, wherein the angle sensor (5) has a Hall sensor, which is in operative connection with the permanent magnet.