Wearable LED Sensor Device Configured to Identify a Wearer's Pulse

摘要

A wearable sensor device can include at least one LED and a light sensor for generating a photoplethysmogram (“PPG”) from light emitted by the at least one LED. The wearable sensor device can also include a processing unit that is configured to process the PPG to produce a highly reliable representation of the wearer's pulse.

主权项

1. A wearable sensor device comprising:
a housing configured to allow the wearable sensor device to be worn on a portion of the body; and a circuit comprising:
a first LED secured to the housing in a manner that causes the first LED to face the portion of the body when the wearable sensor device is worn;a light sensor secured to the housing, the light sensor being positioned to receive light that is transmitted from the first LED and reflected from or transmitted through the portion of the body, the light sensor being configured to generate a photoplethysmogram (“PPG”) representing the amount of light that is received by the light sensor over time;a processing unit configured to receive the PPG and to process the PPG, the processing of the PPG including:
identifying peaks in the PPG;identifying valleys in the PPG;using the valleys to generate a base of the PPG; andsubtracting the base from the PPG to yield beat data; anda storage for storing the beat data.