PHOTOPLETHYSMOGRAPHY APPARATUS
First Claim
1. A photoplethysmography apparatus:
- a plurality of light-emitting units spaced apart from each other and configured to emit light to a measurement part;
a light-receiving unit disposed in the center of the light-emitting units and configured to detect transmitted or reflected light from the measurement part by the light-emitting units;
a signal pre-processing unit configured to amplify and filter a measurement signal of the light-receiving unit; and
a signal processing unit configured to extract a heart rate of a target person using an output signal of the pre-processing unit,wherein the light-emitting units and the light-receiving unit provide a plurality of optical paths, and the light-receiving unit detects spatially averaged reflected or transmitted light at the measurement part.
1 Assignment
0 Petitions
Accused Products
Abstract
A photoplethysmography apparatus is provided. The photoplethysmography includes a plurality of light-emitting units spaced apart from each other and configured to emit light to a measurement part, a light-receiving unit disposed in the center of the light-emitting units and configured to detect transmitted or reflected light from the measurement part by the light-emitting units, a signal pre-processing unit configured to amplify and filter a measurement signal of the light-receiving unit, and a signal processing unit configured to extract a heart rate of a target person using an output signal of the pre-processing unit. The light-emitting units and the light-receiving unit provide a plurality of optical paths, and the light-receiving unit detects spatially averaged reflected or transmitted light at the measurement part.
21 Citations
8 Claims
-
1. A photoplethysmography apparatus:
-
a plurality of light-emitting units spaced apart from each other and configured to emit light to a measurement part; a light-receiving unit disposed in the center of the light-emitting units and configured to detect transmitted or reflected light from the measurement part by the light-emitting units; a signal pre-processing unit configured to amplify and filter a measurement signal of the light-receiving unit; and a signal processing unit configured to extract a heart rate of a target person using an output signal of the pre-processing unit, wherein the light-emitting units and the light-receiving unit provide a plurality of optical paths, and the light-receiving unit detects spatially averaged reflected or transmitted light at the measurement part. - View Dependent Claims (2, 3, 4)
-
-
5. A photoplethysmography apparatus comprising:
-
light-receiving units spaced apart from each other and attached to a measurement part of a target person and configured to detect reflected or transmitted light from the measurement part; a light-emitting unit disposed in the center of the light-receiving units and attached to the measurement part and configured to provide output light to the measurement part; an acceleration sensor attached to the measurement part and configured to detect motion; a signal pre-processing unit configured to amplify and filter output signals of the light-receiving units and the acceleration sensor; and a signal processing unit configured to compensate dynamic disturbance caused by the acceleration using the output signal of the signal pre-processing unit extract a heart rate of the target person, wherein the signal processing unit processes output signals of the light-receiving units after averaging the output signals. - View Dependent Claims (6)
-
-
7. A photoplethysmography apparatus comprising:
-
a light-emitting unit; a first reflecting unit configured to reflect output light of the light-emitting unit in one direction or to one side; a second reflecting unit disposed on the center of the first reflecting unit and configured to reflect of output light of the light-emitting unit or re-reflect the light reflected from the first reflecting unit and provide the re-reflected light to the first reflecting unit; and a light-receiving unit mounted on the second reflecting unit and attached to a measurement part of a target person, wherein the first reflecting unit and the second reflecting unit provide a plurality of symmetrical optical paths between the light-emitting unit and the light-receiving around the measurement part. - View Dependent Claims (8)
-
Specification