On-demand heart rate estimation based on optical measurements
US10285651B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2016 |
| Grant date | May 14, 2019 |
| Priority date | — |
| Expiry date | Mar 22, 2037 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/7221
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Activity monitors and smart watches utilizing optical measurements are becoming widely popular, and users expect to get an increasingly accurate estimate of their heart rate (HR) from these devices. These devices are equipped with a light source and an optical sensor which enable estimation of HR using a technique called photoplethysmography (PPG). One of the main challenges of HR estimation using PPG is the coupling of motion into the optical PPG signal when the user is moving randomly or exercising. The present disclosure describes a computationally feasible and fast HR estimation algorithm to be executed at instances of little or no motion. Resulting HR readings may be useful on their own, or be provided to systems that monitor HR continuously to prevent the problem of such systems being locked on an incorrect HR for long periods of time. Implementing techniques described herein leads to more accurate HR measurements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.