Rotational speed and/or rotational angle detection unit and working device

A rotational speed and/or rotational angle detection unit for detecting a rotational speed and/or a rotational angle of a crankshaft of a working device or a vehicle that is drivable by muscular power and/or by motor power about a rotational axis of the crankshaft, the rotational speed and/or rotational angle detection unit comprising:

• a surface structure that is materially and/or magnetically formed on a surface of the crankshaft;
• and
• a sensor unit configured to detect a magnetic field carried by the crankshaft and by the surface structure;
• wherein the surface structure is configured as encoding for an angular position of the crankshaft about the rotational axis.

A working device that is drivable with muscular power and/or or by motor power, the working device being a vehicle, or a bicycle, or an electric bicycle, or an e-bike, or a pedelec, comprising:

• at least one wheel;
• a drive configured to drive the at least one wheel;
• and
• a rotational speed and/or rotational angle detection unit configured to detect a rotational speed and/or a rotational angle of a shaft of the drive, including:
• a surface structure that is materially and/or magnetically formed on a surface of the shaft, and
• a sensor unit configured to detect a magnetic field carried by the shaft and by the surface structure,
• wherein the surface structure is configured as encoding for an angular position of the shaft about the rotational axis;
• wherein the drive is monitorable and/or controllable based on the detected rotational speed and/or the detected rotational angle.