发明授权
US09031629B2 Non-contact photoplethysmographic pulse measurement device and oxygen saturation and blood pressure measurement devices using the same 有权
非接触式光电体积描记术脉搏测量装置和血氧饱和度测量装置使用相同

Non-contact photoplethysmographic pulse measurement device and oxygen saturation and blood pressure measurement devices using the same
摘要:
The present invention provides a non-contact photoplethysmographic (PPG) pulse measurement device, and oxygen saturation and blood pressure measurement devices using the PPG pulse measurement device. The PPG pulse measurement device includes a sensing unit including at least two light emitting units for emitting light into a human body without making direct contact with skin, and a light receiving unit for sensing reflected light. A signal separation unit separates output of the sensing unit into a ripple component and a ripple-free component. A microprocessor unit monitors the ripple-free component and compares the ripple-free component with a DC signal value. A luminance adjustment unit adjusts luminance of the light emitting units. A filter and amplification unit eliminates noise from the ripple component. An A/D conversion unit converts output of the filter and amplification unit into a digital signal. A signal transmission unit transmits output of the A/D conversion unit.
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