MARTIN OUWERKERK,LUTZ CHRISTIAN GERHARDT,NEIL FRANCIS JOYE
申请号：
US15780847
公开号：
US20180353101A1
申请日:
2016.12.14
申请国别(地区):
US
年份:
2018
代理人:
摘要：
A sensor is provided for sensing layer removal from a surface. A head has an abrasive portion for contacting the surface and a conducting portion inside the head. This device has a sensor design which provides self-generation of a sensor signal with no power supply to the device head. This simplifies the design of the sensor head, and means it can have a design which is easy to clean with no parts which are easily damaged. In one set of examples, the device is a skin treatment device.
