Pulse rate monitor

Details Pulse rate monitor Pulse rate monitor

1994-12-14

1997-12-16

Nasser, Robert

Surgery

Truss

Pad

128687, 128690, A61B 500

Patent

active

056973748

ABSTRACT:
A pulse rate monitor having an enhanced accuracy, reduced power consumption and reduced calculation time comprises a pulse wave extraction circuitry for extracting pulse wave frequency components from a power spectrum output of a pulse wave sensor and a movement sensor, and a pulse rate calculation circuit for calculating a pulse rate in accordance with the extracted pulse wave frequency components. A display device may be included to display the calculated pulse rate. In order to reduce power consumption, unnecessary circuitry may be deactivated and unnecessary operations may be avoided by use of a changing circuit which changes the method of calculation when movement of the user is not detected. Accordingly, when no movement has been detected for a predetermined period of time, the pulse rate may be calculated based upon a direct output of the pulse rate sensor, while the frequency analysis circuitry and calculation circuitry may remain deactivated.

REFERENCES:
patent: 4260951 (1981-04-01), Lewyn
patent: 4409983 (1983-10-01), Albert
patent: 5381797 (1995-01-01), Pak et al.
patent: 5431170 (1995-07-01), Mathews

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