Harri Matti-Heikki Laakkonen,Hannu Olavi Kinnunen,Markku Olavi Koskela
申请号：
US14606341
公开号：
US20160213267A1
申请日:
2015.01.27
申请国别(地区):
US
年份:
2016
代理人:
摘要：
Disclosed is an apparatus for measuring photoplethysmogram. The apparatus includes a ring structure with at least one photon source and at least one photon detector positioned on an inner surface of the ring structure. The apparatus further includes a controller configured to measure a preliminary photoplethysmogram during a first time period by taking a first number of samples, determine a form factor from said preliminary photoplethysmogram, determine an inter beat interval from said preliminary photoplethysmogram, and use the form factor and the inter beat interval to determine a second number of samples to be taken during a second time period of measurement of the photoplethysmogram and the distribution of the samples to be taken in function of time.
