Method of measuring an artefact removed photoplethysmographic (PPG) signal and a measurement system
First Claim
1. A method of producing an artefact removed photoplethysmographic (PPG) signal, the method comprising:
- obtaining a first set of PPG signals from a plurality of detectors at respective measurement sites using a first illumination;
obtaining a second set of PPG signals from the plurality of detectors using a second illumination;
obtaining at least two pairs of PPG signals, each pair comprising one PPG signal from the first set and one PPG signal from the second set;
computing an artefact reference signal based on the each pair of PPG signals using a vector subspace approach by using, for the pairs of PPG signals, artefact reference signals at an angle of between
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Abstract
A method of measuring an artifact removed photoplethysmographic (PPG) signal and a measurement system for measuring an artifact removed photoplethysmographic (PPG) signal are provided. The method comprises obtaining a first set of PPG signals from a plurality of detectors at respective measurement sites using a first illumination; obtaining a second set of PPG signals from the plurality of detectors using a second illumination; obtaining at least two pairs of PPG signals, each pair comprising one PPG signal from the first set and one PPG signal from the second set, and for each pair, computing an artifact reference signal to obtain a candidate PPG signal; and choosing one of the candidate PPG signals as the artifact removed PPG signal.
8 Citations
21 Claims
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1. A method of producing an artefact removed photoplethysmographic (PPG) signal, the method comprising:
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obtaining a first set of PPG signals from a plurality of detectors at respective measurement sites using a first illumination; obtaining a second set of PPG signals from the plurality of detectors using a second illumination; obtaining at least two pairs of PPG signals, each pair comprising one PPG signal from the first set and one PPG signal from the second set; computing an artefact reference signal based on the each pair of PPG signals using a vector subspace approach by using, for the pairs of PPG signals, artefact reference signals at an angle of between - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A measurement system configured to measure an artefact removed photoplethysmographic (PPG) signal, the system comprising,
a measurement device comprising a plurality of detectors at respective measurement sites configured to obtain a first set of PPG signals using a first illumination and configured to obtain a second set of PPG signals using a second illumination; a computation unit configured to obtain at least two pairs of PPG signals, each pair comprising one PPG signal from the first set and one PPG signal from the second set, and the computation unit being configured to, for each pair, compute an artefact reference signal based on the each pair of PPG signals using a vector subspace approach by using, for the pairs of PPG signals, artefact reference signals at an angle of between - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
Specification