Schneider, Stefan Michael

In accordance with the present disclosure, a personal hygiene device has a resonant motor and a motor control unit for applying a periodic voltage signal with a driving frequency at the resonant motor for driving the resonant motor into an oscillating motion with an oscillating frequency equal to the driving frequency. The motor control unit comprises a synthesizer circuit for digitally synthesizing the periodic voltage signal from voltage pulses of variable length provided with a pulse frequency higher than the driving frequency such that at least two voltage pulses are applied at least in one of two half cycles of each period of the periodic voltage signal.

In accordance with the present disclosure, a personal hygiene device has a resonant motor and a motor control unit for applying a periodic voltage signal with a driving frequency at the resonant motor for driving the resonant motor into an oscillating motion with an oscillating frequency equal to the driving frequency. The motor control unit comprises a synthesizer circuit for digitally synthesizing the periodic voltage signal from voltage pulses of variable length provided with a pulse frequency higher than the driving frequency such that at least two voltage pulses are applied at least in one of two half cycles of each period of the periodic voltage signal.

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The present invention is concerned with an apparatus for performing a localization of a movable treatment device relative to a target surface is provided, the movable treatment device having at least one inertial sensor and being configured to treat the target surface, the apparatus having a motion pattern classification device configured to discriminate between two or more motion classes contained in a set of motion classes of the movable treatment device, and an interface for providing at least one inertial sensor data from the inertial sensor to the motion pattern classification device, the at least one inertial sensor data representing a movement of the movable treatment device, wherein the motion pattern classification device has at least one neural network configured to receive the at least one inertial sensor data and to classify the at least one inertial sensor data with respect to the motion classes contained in the set of motion classes, wherein said motion classes are each associated with one or more different zones relating to the target surface so that the classification of the at least one inertial sensor data with respect to the motion classes indicates an estimation of the location of the movable treatment device with respect to the one or more zones of the target surface. The invention is also concerned with a respective method.

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