MEASURING RESPIRATION RATE WITH MULTI-BAND PLETHYSMOGRAPHY
First Claim
1. A method of an electronic device including a plurality of light emitters, the method comprising:
- emitting light from the plurality of light emitters;
receiving first light information based on light emitted at a first wavelength from a first light emitter;
receiving second light information based on light emitted at a second wavelength from a second light emitter; and
based on a cross-correlation of the first and second light information, computing a physiological signal corresponding to a respiratory rate of a user of the electronic device.
0 Assignments
0 Petitions
Accused Products
Abstract
A photoplethysmogram (PPG) signal may be obtained from a pulse oximeter, which employs a light emitter and a light sensor to measure the perfusion of blood to the skin of a user, and multiple wavelengths of light may be employed. For various wavelengths, relatively long wavelengths may interrogate relatively deep blood vessels in comparison to relatively short wavelengths, which may interrogate relatively shallow blood vessels. Accordingly, for co-located emitters of different wavelengths, there may be a time delay in the pulse signal measured by each wavelength. The time delay as a function of time may vary according to the constriction and dilation of the blood vessels, which itself may vary according to the respiratory rate of a user.
55 Citations
24 Claims
-
1. A method of an electronic device including a plurality of light emitters, the method comprising:
-
emitting light from the plurality of light emitters; receiving first light information based on light emitted at a first wavelength from a first light emitter; receiving second light information based on light emitted at a second wavelength from a second light emitter; and based on a cross-correlation of the first and second light information, computing a physiological signal corresponding to a respiratory rate of a user of the electronic device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A non-transitory computer readable medium, the computer readable medium containing instructions that, when executed, perform a method of an electronic device including a plurality of light emitters, the method comprising:
-
emitting light from the plurality of light emitters; receiving first light information based on light emitted at a first wavelength from a first light emitter; receiving second light information based on light emitted at a second wavelength from a second light emitter; and based on a cross-correlation of the first and second light information, computing a physiological signal corresponding to a respiratory rate of a user of the electronic device. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
-
-
17. An electronic device, comprising:
-
a first light emitter configured to emit a first light, the first light including a first wavelength and a first light information; a second light emitter configured to emit a second light, the second light including a second wavelength and a second light information; a detector configured to receive the first light and the second light; and a processor configured to; receive first light information; receive second light information; and based on a cross-correlation of the first and second light information, compute a physiological signal corresponding to a respiratory rate of a user of the electronic device. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
-
Specification