公开(公告)号：US10331210B2

公开(公告)日：2019-06-25

申请号：US16023276

申请日：2018-06-29

Applicant: North Inc.

Inventor： Cezar Morun ,  Stephen Lake

IPC: A61B5/00 ,  G06F3/01 ,  A61B5/0492 ,  G06F1/16

Abstract: Systems, articles, and methods for improved capacitive electromyography (“EMG”) sensors are described. The improved capacitive EMG sensors include one or more sensor electrode(s) that is/are coated with a protective barrier formed of a material that has a relative permittivity εr of about 10 or more. The protective barrier shields the sensor electrode(s) from moisture, sweat, skin oils, etc. while advantageously contributing to a large capacitance between the sensor electrode(s) and the user's body. In this way, the improved capacitive EMG sensors provide enhanced robustness against variations in skin and/or environmental conditions. Such improved capacitive EMG sensors are particularly well-suited for use in wearable EMG devices that may be worn by a user for an extended period of time and/or under a variety of skin and/or environmental conditions. A wearable EMG device that provides a component of a human-electronics interface and incorporates such improved capacitive EMG sensors is described.

公开(公告)号：US20190192037A1

公开(公告)日：2019-06-27

申请号：US16292609

申请日：2019-03-05

Applicant: North Inc.

Inventor： Cezar Morun ,  Stephen Lake

IPC: A61B5/0492 ,  H05K1/16

CPC classification number: A61B5/0492 ,  H05K1/162 ,  H05K1/167 ,  H05K2201/10151 ,  H05K2201/10166 ,  Y10T29/4913

Abstract: Systems, articles, and methods for surface electromyography (“EMG”) sensors that combine elements from traditional capacitive and resistive EMG sensors are described. For example, capacitive EMG sensors that are adapted to resistively couple to a user's skin are described. Resistive coupling between a sensor electrode and the user's skin is galvanically isolated from the sensor circuitry by a discrete component capacitor included downstream from the sensor electrode. The combination of a resistively coupled electrode and a discrete component capacitor provides the respective benefits of traditional resistive and capacitive (respectively) EMG sensor designs while mitigating respective drawbacks of each approach. A wearable EMG device that provides a component of a human-electronics interface and incorporates such capacitive EMG sensors is also described.