Apparatus and method for measuring heart rate
US5365934A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1993 |
| Grant date | Nov 22, 1994 |
| Priority date | — |
| Expiry date | Apr 26, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/7246
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An exercise apparatus for measuring heart rate is provided which comprises a sensor for generating a signal which includes the biopotential signal produced by a heart. This signal is filtered, amplified and digitized. A computer autocorrelates the digitized signal. A plurality of signal indication routines then scan the autocorrelated output for the presence of periodic signals. Each of the signal indication routines uses different search or filter criteria, such as peak and wave form detection, and generates one (and in some cases, several) candidate heart rates. An arbitrator then selects one of the candidate heart rates according to predetermined criteria. These criteria include the value of previously selected heart rates. In one embodiment, the signal indication and arbitration routines are especially well-suited for measuring the heart rate of a user while exercising on a stair climbing machine or treadmill.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.