	US 12,262,979 B2
	Device, system and method for detection and processing of heartbeat signals
Simone Tognetti, Vimodrone (IT); Ivan Cenci, Verucchio (IT); Daniele Resnati, Carate Brianza (IT); Maurizio Garbarino, Turin (IT); and Matteo Lai, San Sperate (IT)
Assigned to Empatica Srl, Milan (IT)
Filed by Empatica Srl, Milan (IT)
Filed on Jun. 13, 2022, as Appl. No. 17/839,007.
Application 17/839,007 is a continuation of application No. 16/687,061, filed on Nov. 18, 2019, granted, now 11,389,074.
Application 16/687,061 is a continuation of application No. 16/371,701, filed on Apr. 1, 2019, abandoned.
Application 16/371,701 is a continuation of application No. 15/789,220, filed on Oct. 20, 2017, granted, now 10,285,602, issued on May 14, 2019.
Application 15/789,220 is a continuation of application No. 14/808,488, filed on Jul. 24, 2015, granted, now 9,833,155, issued on Dec. 5, 2017.
Application 14/808,488 is a continuation of application No. PCT/IB2014/058428, filed on Jan. 21, 2014.
Prior Publication US 2023/0074365 A1, Mar. 9, 2023
Int. Cl. A61B 5/0533 (2021.01); A61B 5/00 (2006.01); A61B 5/024 (2006.01); A61B 5/0531 (2021.01)

CPC A61B 5/02416 (2013.01) [A61B 5/0002 (2013.01); A61B 5/0071 (2013.01); A61B 5/0531 (2013.01); A61B 5/0533 (2013.01); A61B 5/7203 (2013.01); A61B 5/7214 (2013.01); A61B 2562/0219 (2013.01)]

19 Claims

1. A heart beat detection device, comprising:

a strap configured to be fastened to a wrist of a person, the strap comprising a conductivity sensor configured to measure a conductivity of a skin of the person, wherein the conductivity sensor is configured to periodically invert a polarity to reduce one or more of polarization and electrolysis; and

at least one optical sensor unit configured to be placed near the skin of the person, the at least one optical sensor unit including a light emitter configured to emit light onto the skin, and a light receiver configured to receive light reflected by the skin and to convert the light reflected by the skin into an electric signal.