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    Non-contact Vital Signs Monitor

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    4958638.pdf (1011.Kb)
    Date
    9/25/1990
    Author
    Sharpe, Steven M.
    Seals, Joseph
    Macdonald, Anita H.
    Crowgey, Scott R.
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    Abstract
    An apparatus for measuring simultaneous physiological parameters such as heart rate and respiration without physically connecting electrodes or other sensors to the body. A beam of frequency modulated continuous wave radio frequency energy is directed towards the body of a subject. The reflected signal contains phase information representing the movement of the surface of the body, from which respiration and heartbeat information can be obtained. The reflected phase modulated energy is received and demodulated by the apparatus using synchronous quadrature detection. The quadrature signals so obtained are then signal processed to obtain the heartbeat and respiratory information of interest.
    URI
    http://hdl.handle.net/1853/56775
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