SENSING DEVICE FOR SENSING A VALUE REPRESENTING A DOSE OF A DOSING DEVICE AND METHOD FOR OPERATING THE SENSING DEVICE

摘要

The invention relates to a sensing device (100) for sensing a value (114) representing a dose of a dosing device (102). The sensing device (100) has a rotational angle sensor (108), which can be coupled to a rotatable dosing button (104) of the dosing device (102), and an evaluating device (110). The rotational angle sensor (108) has a coil unit (116) and an electrically conductive interference surface unit (118) that can be rotated relative to the coil unit (116). The coil unit (116) and the interference surface unit (118) are oriented transversely to an axis of rotation of the dosing button (104). The coil unit (116) comprises a transmitting coil, a first receiving coil, and at least one second receiving coil. The rotational angle sensor (104) is designed to represent a rotational angle of the dosing button (104) in a rotational angle signal (112), which rotational angle of the dosing button represents the dose. The evaluating device (110) is designed to determine the value (114) of the dose by using the rotational angle signal (112).