System and Method for Measurement of Physiological Data with Light Modulation
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United States of America Patent
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Issued Date -
Nov 14, 2013
app pub date -
May 11, 2012
filing date -
May 11, 2012
priority date (Note) -
Abandoned
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Abstract
The present invention discloses a device for measuring physiological data of a subject. It comprises a light modulation unit, an optical detection unit and a signal processing unit. The present invention can operate in an active mode or a passive mode to measure a subject's heart rate, respiratory information, haemoglobin level, cardiac output or oxygen saturation of the blood, etc. Fourier Transform based lock-in technique is used to detect the physiological signals reliably even when the signal is weak. In addition, ambient light can be used as the light source to complete the measurement.
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