SENSOR DEVICE FOR INSERTING INTO A RECESS OF A ROTATABLE BODY, AND SYSTEM WITH A ROTATABLE BODY AND A SENSOR DEVICE ACCORDING TO THE INVENTION INSERTED INTO THE RECESS OF THE ROTATABLE BODY

摘要

The invention relates to a sensor device (10) for inserting into a recess (102) of a rotatable body (100), in particular a roller body. The sensor device (10) has at least one communication unit (21) for wirelessly communicating with an external unit and an energy receiver unit (30), said energy receiver unit (30) having at least one conductor loop (31) for inductively supplying energy to the sensor device (10). One aspect of the invention consists in that the communication unit (20) has an antenna element (21), wherein the antenna element (21) and the conductor loop (31) are arranged relative to each other such that the vector (22) of an electric field which can be received and/or emitted by the antenna element (21) is aligned substantially perpendicularly to the main extension plane of the conductor loop (31). The invention additionally relates to a system that has a rotatable body with a recess into which a sensor device according to the invention is inserted.