Combining measurements from different sensors
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United States of America Patent
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Jan 12, 2010
Issued Date -
N/A
app pub date -
Jun 8, 2001
filing date -
Jun 16, 2000
priority date (Note) -
Expired
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Abstract
A method for combining measurements from two or more independent measurement channels, particularly physiological measurements such as heart rate. Independent measurements of heart rate, for instance by ECG and pulse oximetry, can be combined to derive an improved measurement eliminating artefacts on one channel. A model of the process generating the physiological parameter, e.g., the heart rate, is constructed and is run independently for each channel to generate predictions of the parameter. The measured values are compared with the predicted values and the differences are used as an indication of the confidence in the measurement. The measurements from the two channels are ombined using weights calculated from the respective differences.
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