Methods and systems to characterize the user of a personal care device

A personal care device configured to identify a characteristic of a user of the device, comprising:

• a sensor configured to obtain sensor data for a plurality of personal care sessions;
• and
• a controller comprising a training module and a classifier, the training module configured to:
• (i) receive, from the sensor, sensor data for at least one personal care session for each of at least two different users of the personal care device;
• (ii) extract, via an extraction module of the processor, a plurality of features from each of the personal care sessions;
• (iii) reduce, using a dimensionality reduction process, the number of extracted plurality features from one or more of the personal care sessions;
• and (iv) train, using the reduced number of extracted plurality of features, a classifier to identify a characteristic of each of the at least two different users of the personal care device;
• wherein the controller is further configured to receive, from the sensor, sensor data for at least part of a new personal care session initiated by one of the at least two different users of the personal care device, and extract a plurality of features from the sensor data for the new personal care session;
• wherein the classifier is configured to identify, using the extracted plurality of features from the new personal care session, a characteristic of the user of the personal care device, wherein the identified characteristic of the user is an identification of the user and/or the wherein the identified characteristic of the user is an operating parameter of the user.

A personal care device configured to provide feedback to an identified user, comprising:

• a sensor configured to obtain sensor data for a plurality of personal care sessions;
• and
• a controller comprising a training module and a classifier, the training module configured to:
• (i) receive, from the sensor, sensor data for at least one personal care session for each of at least two different users of the personal care device;
• (ii) extract, via an extraction module of the processor, a plurality of features from each of the personal care sessions;
• (iii) reduce, using a dimensionality reduction process, the number of extracted plurality of features from one or more of the personal care sessions;
• and (iv) train, using the reduced number of extracted plurality of features, a classifier to identify a characteristic of each of the at least two different users of the personal care device;
• and wherein the controller is further configured to:
• (v) receive, from the sensor, sensor data for at least part of a new personal care session initiated by one of the at least two different users of the personal care device;
• (vi) extract a plurality of features from the sensor data for the new personal care session;
• (vii) identify, using the extracted plurality of features from the new personal care session, a characteristic of the user of the personal care device, wherein the identified characteristic of the user is an identification of the user and/or wherein the identified characteristic of the user is an operating parameter of the user;
• and
• a user interface configured to provide, based on the identified characteristic of the user of the personal care device, feedback to the user.