Monitoring usage of a hair cutting device
AssigneeKoninklijke Philips N.V.
InventorsMannold Van De Schootbrugge, Daniel Alonzo Dirksz
Life of this patent
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Abstract
According to an aspect, there is provided a computer-implemented method (100) for monitoring usage of a cutting element of a hair cutting device, the method comprising: receiving (102) pressure data indicative of a pressure applied by a cutting element of a hair cutting device on a surface at intervals during a cutting event; storing (104) the received pressure data in a storage device; estimating (106), based on pressure data stored in the storage device in relation to the cutting event and on pressure data stored in the storage device in relation to one or more previous cutting events, a level of wear of the cutting element; and providing (108) an indication of the estimated level of wear for presentation to a recipient.
Claims9
A computer-implemented method for monitoring usage of a cutting element of a hair cutting device, the cutting element having one or more blades, the method comprising steps of:
- receiving pressure data from a pressure sensor configured to measure, at intervals during a cutting event, a pressure applied by the cutting element of the hair cutting device on a surface of a subject's skin;
- storing the pressure data received in the receiving step in a storage device;
- receiving, at intervals during the cutting event, electrical current data indicative of an electrical current across a motor that drives the cutting element of the hair cutting device:
- applying a low-pass filter to the electrical current data received in the receiving step, to define a low-pass-filtered electrical current data;
- determining, by a processor, based on a summation or numerical integration of the pressure data stored in the storage device relating to the cutting event and the pressure data stored in the storage device relating to the one or more previous cutting events, a total pressure applied by the cutting element to the surface since a defined start point;
- and
- estimating, by the processor, a level of wear of the cutting element based on the total pressure and further based on the low-pass-filtered electrical current data;
- and
- providing, by the processor, an indication of the estimated level of wear for presentation to a recipient.
A hair cutting device comprising:
- a cutting element having one or more blades configured to cut hairs extending from a surface of a subject;
- a pressure sensor configured to measure a pressure applied by the cutting element on the surface of the subject's skin during a hair cutting event;
- a motor configured to drive the cutting element;
- a current measurement unit configured to measure an electrical current across the motor;
- and
- a processor configured to:
- receive pressure data from the pressure sensor;
- store the pressure data in a storage device;
- receive, at intervals during the cutting event, electrical current data from the current measurement unit;
- apply a low-pass filter to the electrical current data received in the receiving step, to define a low-pass-filtered electrical current data;
- determine, based on a summation or numerical integration of the pressure data stored in the storage device relating to the cutting event and the pressure data stored in the storage device relating to the one or more previous cutting events, a total pressure applied by the cutting element to the surface since a defined start point;
- estimate a level of wear of the cutting element based on the total pressure and further based on the low-pass-filtered electrical current data and
- provide an indication of the estimated level of wear for presentation to a recipient.
Dependencies are inferred from the claim text.